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Troubleshooting is essential for diagnosing and resolving issues with your '''Macintosh Centris 610''' (or [[Macintosh Quadra 610]]). This guide covers the most common problems and their solutions.
<templatestyles src="Template:StyledTable/styles.css" />
 
[[File:Macintosh Centris 610 Apple product photo.jpg|thumb|right|300px|Macintosh Centris 610 (Apple product photograph, 1993)]]
'''Note:''' The Centris 610 and Quadra 610 share the same hardware. This guide applies to both models.
Symptom-based troubleshooting for the [[Macintosh Centris 610]], which shares its case, power supply and logic board family with the [[Macintosh Quadra 610]]. The tables follow Apple's own symptom charts, which list cures in order of likelihood: try the first, check whether the symptom persists, and if a replaced module did not cure it, refit the original before trying the next.<ref name="ss610ts">Apple Computer, ''Service Source: Macintosh Quadra 610 / Centris 610 / WS 60'', Troubleshooting, pp. 1-11 (PDF pp. 19-29). Hosted as [[:File:Quadra.centris_610.ws_60.pdf]]; see [[Macintosh Quadra 610/ Centris 610/WS 60 Service Source]].</ref> Apple's charts work at module level; where the cure is "replace logic board", the component-level causes on a board of this age are usually leaking capacitors or battery damage (see below).
 
== Preliminary Checks ==


Before troubleshooting, verify:
== Preliminary checks ==
* Power cable is connected and outlet is working
* Mains lead connected and outlet working.
* All cables are securely connected
* Monitor, keyboard and mouse cables seated. The mouse and keyboard use ADB; the monitor uses the DB-15 video port.
* RAM and VRAM SIMMs are properly seated
* DRAM and VRAM SIMMs seated.
* PRAM battery is installed and not dead
* PRAM battery present and reading at least 3.2 V (see [[#Battery|Battery]]).
* Peripherals and third-party cards removed, which is an early step in several of Apple's charts.<ref name="ss610ts" />


== No Power ==
== Power and video ==
<templatestyles src="Template:StyledTable/styles.css" />
{| class="wikitable styled-table" style="width:100%;"
[[File:Macintosh Centris 610 (photo).jpg|thumb|right|300px|Macintosh Centris 610. Source: Wikimedia Commons.]]
|+'''Apple's power and video symptom chart'''<ref name="ss610ts" />
{| class="wikitable styled-table" style="width:100%; text-align:center;"
! Symptom !! Apple's cures, in order
|+ '''Power Issues'''
|-
|-
! Symptom !! Possible Cause !! Recommended Action
| Screen completely dark, fan not running, LED not lit || Check external power cables; remove peripherals; replace power supply; replace logic board
|-
|-
| Completely dead, no LED || Power supply failure || Test outlet, try different power cable, check PSU capacitors
| Screen dark, audio and a drive work, fan running, LED lit || Reset PRAM; adjust monitor brightness; check cables; try another monitor; replace video cable; replace VRAM SIMMs; replace logic board
|-
|-
| Dead after storage || PRAM battery leakage || Inspect battery area for corrosion damage
| Part or all of the screen bright with sound present, but no picture || Reset PRAM; check cables; try another monitor; replace video cable; replace VRAM SIMMs; replace logic board
|-
|-
| Clicks repeatedly || PSU capacitor failure || Replace power supply electrolytic capacitors
| Screen dark, no audio, drive does not operate, fan running, LED lit || Remove peripherals and third-party cards; replace VRAM SIMMs; replace DRAM SIMMs; replace power supply; replace logic board
|-
| Powers on then dies || PSU or logic board issue || Check voltages, inspect for shorted capacitors
|-
| Front button unresponsive || Switch or wiring fault || Test switch continuity, check connections
|}
|}


== Startup Issues ==
A NuBus card in the single slot may draw 10 W at most (+12 V 2.1 W, −12 V 1.8 W, +5 V 6.1 W, or 10 W all at +5 V).<ref name="dn32">Apple Computer, ''Developer Note: Macintosh Centris 610, Macintosh Centris 650, and Macintosh Quadra 800 Computers'' (1993), Table 3-2, p. 32 (PDF p. 44). Hosted as [[:File:Macintosh Centris 610 Centris 650 and Quadra 800 Developer Note.pdf]].</ref> Remove any card when chasing a power fault.
{| class="wikitable styled-table" style="width:100%; text-align:center;"
|+ '''Startup Problems'''
|-
! Symptom !! Possible Cause !! Recommended Action
|-
| Chime but no video || VRAM issue, monitor problem || Reseat VRAM, test with different monitor
|-
| No chime, no video || RAM failure, logic board fault || Reseat RAM, check for capacitor damage
|-
| Sad Mac icon || Hardware failure (code indicates area) || Decode error, check RAM first
|-
| Flashing question mark || No bootable system found || Check hard drive, reinstall system software
|-
| Chimes of death || RAM or logic board failure || Reseat RAM, test with known-good SIMMs
|}


== Sad Mac Error Codes ==
=== Power supply ===
The supply is Apple service part 661-1688, shared with the Centris 660AV;<ref name="ss610ev">''Service Source: Macintosh Quadra 610 / Centris 610 / WS 60'', Exploded View (PDF p. 103).</ref> Console5 identifies it as the ASTEC AA16990 (Apple 614-0022) and sells an electrolytic kit for it.<ref name="c5">{{cite web |url=https://console5.com/store/macintosh-centris-quadra-610-660av-psu-cap-kit-astec-aa16990.html |title=Macintosh Centris / Quadra 610 / 660AV PSU Cap Kit - ASTEC AA16990 |publisher=Console5 |access-date=2026-09-30}}</ref> Apple publishes no rail tolerances for this machine. Before opening the supply read the mains and stored-charge warning on [[Macintosh Centris 610 General Maintenance#Working on the supply|Macintosh Centris 610 General Maintenance]].


The Centris 610 displays Sad Mac icons with hexadecimal error codes when hardware failures are detected.
== Start-up and Sad Mac ==
* A normal start-up chime with a dark screen: work through the video rows above.
* A Sad Mac icon with two lines of hexadecimal code: decode it with [[Sad Mac Error Codes]] and the [[Sad Mac Decoder]]. The first line's last two digits give the failing test (for example 01 is the ROM checksum, 04 and 05 are RAM tests, 0F is an exception), and the second line identifies the failing bit, address or exception.<ref name="sadmac">[[Sad Mac Error Codes]], expanded format and class-code tables (original research of this wiki).</ref>
* A flashing question mark: no bootable system was found. Check the hard drive and SCSI chain (below), or boot from a floppy or CD.


{| class="wikitable styled-table" style="width:80%; text-align:center;"
== Floppy drive ==
|+ '''Common Sad Mac Codes'''
{| class="wikitable styled-table" style="width:100%;"
|+'''Apple's floppy drive symptom chart'''<ref name="ss610ts" />
! Symptom !! Apple's cures, in order
|-
|-
! Code !! Meaning
| Sound and picture present, but the internal floppy drive does not work || Replace floppy drive cable; replace floppy drive; replace logic board
|-
|-
| 0000000F || RAM test failed (bad SIMM)
| Disk ejects and the screen shows a disk icon with a flashing X || Try another disk; replace floppy drive cable; replace floppy drive; replace logic board
|-
|-
| 00000001 || ROM test failed
| Disk does not eject || Switch off, then hold the mouse button down while switching on; eject the disk manually; replace floppy drive cable; replace floppy drive
|-
|-
| 00000002 || Memory test failed
| Drive tries to eject but the disk does not come out || Push the disk fully in; eject manually; replace floppy drive
|-
| 00000003 || ROM checksum error
|-
| 00000004 || Bad RAM (first bank)
|-
| 00000005 || Bad RAM (second bank)
|}
|}


See [[Sad Mac Error Codes]] for a complete reference.
See [[Macintosh Floppy Drive Maintenance]] for head cleaning.


== Intermittent Operation ==
== Hard drive, CD-ROM and SCSI ==
{| class="wikitable styled-table" style="width:100%; text-align:center;"
{| class="wikitable styled-table" style="width:100%;"
|+ '''Intermittent Issues'''
|+'''Apple's hard drive, CD-ROM and SCSI charts'''<ref name="ss610ts" />
|-
! Symptom !! Apple's cures, in order
! Symptom !! Possible Cause !! Recommended Action
|-
|-
| Random freezes || Leaking capacitors || Inspect and recap logic board
| Internal hard drive runs continuously || Replace SCSI data cable; replace hard drive; replace logic board
|-
|-
| Intermittent startup || Cold solder joints || Reflow solder on capacitors and connectors
| Internal hard drive does not operate || Replace SCSI data cable; replace SCSI power cable; check power to the drive; replace drive; replace logic board
|-
|-
| Crashes after warmup || Thermal issue, bad cap || Check cooling, inspect capacitors
| CD-ROM drive does not accept a disc || Try another disc; replace the 50-pin ribbon cable; replace CD-ROM mechanism
|-
|-
| SCSI errors || Termination or cable issue || Verify SCSI chain termination
| No CD-ROM icon on the desktop || Check the CD-ROM extension is in the System Folder; check the disc is in correctly; replace CD-ROM mechanism; replace power supply; replace SCSI data cable
|-
|-
| Lost date/time || Dead PRAM battery || Replace 3.6V lithium battery
| Works with an internal or an external SCSI device but not both || Give each device a different SCSI ID; terminate the hard drive but not the optional CD-ROM; replace the external drive's terminator; replace the external device's SCSI select cable
|}
|}


== Video Problems ==
The drive at the end of the internal SCSI cable must carry terminators and other internal devices must not; the logic board terminates the external end automatically when nothing is attached.<ref name="dnscsi">''Developer Note: Centris 610, Centris 650, Quadra 800'', "SCSI Bus and Termination", pp. 18-19 (PDF pp. 30-31).</ref> The computer is always SCSI device 7, and up to six external devices are supported.<ref name="ss610spec">''Service Source: Macintosh Quadra 610 / Centris 610 / WS 60'', Specifications, I/O Interfaces, p. 6 (PDF p. 10).</ref>
{| class="wikitable styled-table" style="width:100%; text-align:center;"
|+ '''Display Issues'''
|-
! Symptom !! Possible Cause !! Recommended Action
|-
| No video, system runs || VRAM failure || Reseat or replace VRAM SIMMs
|-
| Garbled display || VRAM or video circuit fault || Test VRAM, check for cap leakage near video
|-
| Wrong resolution || VRAM not detected || Clean and reseat VRAM
|-
| Video cuts out || Loose cable or connector || Check video port and cable connections
|}


== Floppy Drive Issues ==
== Keyboard and mouse ==
{| class="wikitable styled-table" style="width:100%; text-align:center;"
{| class="wikitable styled-table" style="width:100%;"
|+ '''Floppy Problems'''
|+'''Apple's peripheral chart'''<ref name="ss610ts" />
|-
! Symptom !! Apple's cures, in order
! Symptom !! Possible Cause !! Recommended Action
|-
|-
| Won't eject || Mechanical failure || Manually eject with paperclip, lubricate mechanism
| Cursor does not move || Restart; check the mouse connection; reset PRAM; if the mouse is plugged into the keyboard, plug it into the computer's ADB port, and if it then works replace the keyboard; if it fails in every port replace the mouse; replace logic board
|-
|-
| Can't read disks || Dirty heads || Use cleaning disk, check for debris
| Cursor moves but clicking does nothing || Replace mouse; replace logic board
|-
|-
| Disks not recognized || Drive failure || Test with known-good drive
| Double-click does not open anything || Remove duplicate System files; clear PRAM (Command-Option-P-R at start-up); check the mouse as above; replace logic board
|-
|-
| Grinding noise || Lack of lubrication || Clean and lubricate mechanism
| No response to any key || Check the keyboard is connected to an ADB port; replace keyboard cable; replace keyboard; replace logic board
|}
|}


See [[Macintosh Floppy Drive Maintenance]] for detailed procedures.
All ADB devices together may draw 500 mA at most.<ref name="ss610io">''Service Source: Macintosh Quadra 610 / Centris 610 / WS 60'', Specifications, I/O Devices, p. 8 (PDF p. 12).</ref>


== SCSI Problems ==
== Battery ==
{| class="wikitable styled-table" style="width:100%; text-align:center;"
The clock and PRAM run from a 3.6 V lithium battery.<ref name="apple">{{cite web |url=https://support.apple.com/en-us/112212 |title=Macintosh Centris 610: Technical Specifications |publisher=Apple |access-date=2026-09-30}}</ref> A machine that loses the date and time, or its control panel settings, when unplugged needs a new one. Apple's test is to measure the battery on the 10 V DC range and replace it below 3.2 V.<ref name="ss610batt">''Service Source: Macintosh Quadra 610 / Centris 610 / WS 60'', Additional Procedures, Battery Verification, p. 2 (PDF p. 94).</ref> Apple warns that the lithium battery can explode if handled or disposed of improperly.<ref name="ss610batt" /> A machine found dead after storage should be checked for battery leakage around the holder before anything else; lithium leakage is cleaned with bicarbonate, not vinegar. See [[Battery Explosion, Capacitor or Corrosion Damage]].
|+ '''SCSI Issues'''
|-
! Symptom !! Possible Cause !! Recommended Action
|-
| Drive not mounting || Termination issue || Ensure proper termination (internal and external)
|-
| Intermittent SCSI errors || Bad cable or connector || Replace SCSI cable, check connections
|-
| Slow SCSI performance || ID conflict || Verify unique SCSI IDs (0-6, avoid 7)
|-
| External drive issues || Power or termination || Check external device power, add terminator
|}
 
== Capacitor Failure ==
 
The Centris 610 logic board has 10 surface-mount electrolytic capacitors that fail with age.
 
=== Symptoms of Cap Failure ===
* Random crashes or freezes
* Audio distortion or no sound
* Boot failures
* Visible corrosion or residue on the logic board
 
=== Solution ===
Replace all 10 logic board capacitors. See [[Macintosh Centris 610 Capacitor Replacement Guide]].
 
== ⚠️ PRAM battery — remove it now ==
 
The Centris 610 carries a 3.6&nbsp;V 1/2AA lithium PRAM battery. These leak and can '''burst''', spraying corrosive electrolyte across the logic board and destroying nearby components &mdash; often while the machine simply sits in storage. '''Remove the PRAM battery from any un-serviced unit.''' If one has leaked, neutralise and clean the residue and repair corroded traces and vias before troubleshooting.<ref name="mac2_batt">[https://68kmla.org/bb/threads/warning-exploding-maxell-pram-batteries.25169/ "Warning! Exploding Maxell PRAM Batteries"], 68kMLA; and [https://macdat.net/macintosh/macii/macintosh_iicx.html MacDat &mdash; Macintosh II family]. Source for the leaking/exploding lithium PRAM battery that destroys nearby components.</ref>
 
== Logic board (tantalum capacitors) ==
 
Unlike the LC and Mac II surface-mount-electrolytic boards, the 68040-family Centris 610 logic board uses '''tantalum''' capacitors, which do not leak with age &mdash; the '''logic board does not normally need recapping'''. If the board misbehaves, look to leaked-PRAM-battery corrosion, socket/connector contacts and the power supply rather than to board capacitors.<ref name="quadra_tant">[https://retroviator.com/2021/09/02/apple-macintosh-quadra-650/ "Apple Macintosh Quadra 650"], Retro Viator; and the Apple Macintosh Quadra/Centris 650 Service Source. Source for the 68040-family logic boards using tantalum capacitors (no logic-board recap needed) while the power supply uses electrolytics that do need replacing.</ref>
 
== Power supply ==
 
The power supply uses electrolytic capacitors that fail with age (fails to power on, unexpected power-off, clicking when plugged in). '''Recap the power supply''' and confirm the rails.<ref name="mac2_psu">[https://68kmla.org/bb/threads/compact-desktop-power-supply-capacitor-lists-by-make-and-model.35890/ "Compact/Desktop Power Supply Capacitor Lists (by make and model)"], 68kMLA; and [https://www.bigmessowires.com/2016/04/21/capacitor-replacement-in-a-vintage-power-supply/ "Capacitor Replacement in a Vintage Power Supply"], Big Mess o' Wires. Source for the shared desktop PSU form factor (IIci/IIcx/IIvi/IIvx/Performa 600/Quadra 650/Quadra 700), the electrolytic failure symptoms and the PSU capacitor lists.</ref>
 
== References ==
 
<references />


== Component-level faults (deep dive) ==
== Logic board capacitors ==
Recap-a-Mac's annotated photograph marks ten 47 µF 16 V surface-mount electrolytics on the logic board.<ref name="ram">{{cite web |url=https://recapamac.com.au/quadra-610/ |title=Macintosh Quadra 610 |publisher=Recap-a-Mac |access-date=2026-09-30}}</ref> For the signs of failure see [[Capacitor Failure Symptoms]]; for the recap see [[Macintosh Centris 610 Capacitor Replacement Guide]].


=== Surface-mount capacitor leakage ===
== Related pages ==
 
* [[Macintosh Centris 610]]
The Macintosh Centris 610 logic board uses surface-mount electrolytic capacitors whose electrolyte turns corrosive with age and creeps across the board, eating through traces, pads and IC pins. Typical signatures are a machine that will not chime, chimes but shows no video, plays distorted or missing audio, or shows a garbled or checkerboard screen. Wash the affected area and replace every electrolytic with a tantalum or polymer part, then repair any lifted traces. The switch-mode power supply (ASTEC or TDK on the LC-family machines) holds its own electrolytics and fails the same way, so recap it alongside the board.<ref name="caps">Mac84, [https://mac84.net/web/macintosh-lc-series-lc-lc-ii-lc-iii-power-supply-recapping-guide-astec-usa/ Macintosh LC series power-supply recapping guide]; the [http://www.maccaps.com/MacCaps/Capacitor_Reference/Capacitor_Reference.html MacCaps capacitor reference]; and iFixit. Source for surface-mount electrolytic leakage eating traces, pads and pins, the ASTEC/TDK LC power-supply cap failures, and Apple's use of tantalum (non-leaking) capacitors on the Quadra 700/900 logic boards.</ref>
 
=== PRAM battery ===
 
The Macintosh Centris 610 backs up its clock and Parameter RAM from a 3.6&nbsp;V &frac12;AA lithium cell. These cells &mdash; red Maxell parts especially &mdash; leak or burst and corrode the board, so remove an aged one on sight. A flat cell can also stop a soft-power machine booting or disturb the video; left plugged in, trickle power preserves the settings, but a machine switched off at the wall with a dead cell loses them. Clean the area and fit a fresh 3.6&nbsp;V cell.<ref name="pram">[https://68kmla.org/bb/threads/warning-exploding-maxell-pram-batteries.25169/ Warning! Exploding Maxell PRAM batteries], 68kMLA; and [https://www.macdat.net/repair/kb/batteries_macintosh.html Mac Battery Leaks], MacDat. Source for the 3.6&nbsp;V &frac12;AA lithium PRAM cell, the Maxell leak/explosion board damage, and soft- versus hard-power PRAM retention.</ref>
 
=== Boot chime and Sad Mac ===
 
Read the start-up sound first: a normal chime with a black screen points to the display path or the monitor, an absent chime or a "chord of death" points to RAM or a core fault, and a Sad Mac shows a numeric code &mdash; see [[Sad Mac Error Codes]].
 
== Related Pages ==
* [[Macintosh Centris 610 General Maintenance]]
* [[Macintosh Centris 610 General Maintenance]]
* [[Macintosh Centris 610 Capacitor Replacement Guide]]
* [[Macintosh Centris 610 Capacitor Replacement Guide]]
* [[Sad Mac Error Codes]]
* [[Sad Mac Error Codes]]
* [[Macintosh Floppy Drive Maintenance]]
* [[Macintosh Floppy Drive Maintenance]]
== References ==
<references />


[[Category:Apple Vintage Computers]]
[[Category:Apple Vintage Computers]]
[[Category:Apple Troubleshooting Guides]]
[[Category:Apple Troubleshooting Guides]]
{{Navbox-AppleVintage|state=collapsed}}

Latest revision as of 15:20, 30 September 2026

Macintosh Centris 610 (Apple product photograph, 1993)

Symptom-based troubleshooting for the Macintosh Centris 610, which shares its case, power supply and logic board family with the Macintosh Quadra 610. The tables follow Apple's own symptom charts, which list cures in order of likelihood: try the first, check whether the symptom persists, and if a replaced module did not cure it, refit the original before trying the next.[1] Apple's charts work at module level; where the cure is "replace logic board", the component-level causes on a board of this age are usually leaking capacitors or battery damage (see below).

Preliminary checks

[edit | edit source]
  • Mains lead connected and outlet working.
  • Monitor, keyboard and mouse cables seated. The mouse and keyboard use ADB; the monitor uses the DB-15 video port.
  • DRAM and VRAM SIMMs seated.
  • PRAM battery present and reading at least 3.2 V (see Battery).
  • Peripherals and third-party cards removed, which is an early step in several of Apple's charts.[1]

Power and video

[edit | edit source]
Apple's power and video symptom chart[1]
Symptom Apple's cures, in order
Screen completely dark, fan not running, LED not lit Check external power cables; remove peripherals; replace power supply; replace logic board
Screen dark, audio and a drive work, fan running, LED lit Reset PRAM; adjust monitor brightness; check cables; try another monitor; replace video cable; replace VRAM SIMMs; replace logic board
Part or all of the screen bright with sound present, but no picture Reset PRAM; check cables; try another monitor; replace video cable; replace VRAM SIMMs; replace logic board
Screen dark, no audio, drive does not operate, fan running, LED lit Remove peripherals and third-party cards; replace VRAM SIMMs; replace DRAM SIMMs; replace power supply; replace logic board

A NuBus card in the single slot may draw 10 W at most (+12 V 2.1 W, −12 V 1.8 W, +5 V 6.1 W, or 10 W all at +5 V).[2] Remove any card when chasing a power fault.

Power supply

[edit | edit source]

The supply is Apple service part 661-1688, shared with the Centris 660AV;[3] Console5 identifies it as the ASTEC AA16990 (Apple 614-0022) and sells an electrolytic kit for it.[4] Apple publishes no rail tolerances for this machine. Before opening the supply read the mains and stored-charge warning on Macintosh Centris 610 General Maintenance.

Start-up and Sad Mac

[edit | edit source]
  • A normal start-up chime with a dark screen: work through the video rows above.
  • A Sad Mac icon with two lines of hexadecimal code: decode it with Sad Mac Error Codes and the Sad Mac Decoder. The first line's last two digits give the failing test (for example 01 is the ROM checksum, 04 and 05 are RAM tests, 0F is an exception), and the second line identifies the failing bit, address or exception.[5]
  • A flashing question mark: no bootable system was found. Check the hard drive and SCSI chain (below), or boot from a floppy or CD.

Floppy drive

[edit | edit source]
Apple's floppy drive symptom chart[1]
Symptom Apple's cures, in order
Sound and picture present, but the internal floppy drive does not work Replace floppy drive cable; replace floppy drive; replace logic board
Disk ejects and the screen shows a disk icon with a flashing X Try another disk; replace floppy drive cable; replace floppy drive; replace logic board
Disk does not eject Switch off, then hold the mouse button down while switching on; eject the disk manually; replace floppy drive cable; replace floppy drive
Drive tries to eject but the disk does not come out Push the disk fully in; eject manually; replace floppy drive

See Macintosh Floppy Drive Maintenance for head cleaning.

Hard drive, CD-ROM and SCSI

[edit | edit source]
Apple's hard drive, CD-ROM and SCSI charts[1]
Symptom Apple's cures, in order
Internal hard drive runs continuously Replace SCSI data cable; replace hard drive; replace logic board
Internal hard drive does not operate Replace SCSI data cable; replace SCSI power cable; check power to the drive; replace drive; replace logic board
CD-ROM drive does not accept a disc Try another disc; replace the 50-pin ribbon cable; replace CD-ROM mechanism
No CD-ROM icon on the desktop Check the CD-ROM extension is in the System Folder; check the disc is in correctly; replace CD-ROM mechanism; replace power supply; replace SCSI data cable
Works with an internal or an external SCSI device but not both Give each device a different SCSI ID; terminate the hard drive but not the optional CD-ROM; replace the external drive's terminator; replace the external device's SCSI select cable

The drive at the end of the internal SCSI cable must carry terminators and other internal devices must not; the logic board terminates the external end automatically when nothing is attached.[6] The computer is always SCSI device 7, and up to six external devices are supported.[7]

Keyboard and mouse

[edit | edit source]
Apple's peripheral chart[1]
Symptom Apple's cures, in order
Cursor does not move Restart; check the mouse connection; reset PRAM; if the mouse is plugged into the keyboard, plug it into the computer's ADB port, and if it then works replace the keyboard; if it fails in every port replace the mouse; replace logic board
Cursor moves but clicking does nothing Replace mouse; replace logic board
Double-click does not open anything Remove duplicate System files; clear PRAM (Command-Option-P-R at start-up); check the mouse as above; replace logic board
No response to any key Check the keyboard is connected to an ADB port; replace keyboard cable; replace keyboard; replace logic board

All ADB devices together may draw 500 mA at most.[8]

Battery

[edit | edit source]

The clock and PRAM run from a 3.6 V lithium battery.[9] A machine that loses the date and time, or its control panel settings, when unplugged needs a new one. Apple's test is to measure the battery on the 10 V DC range and replace it below 3.2 V.[10] Apple warns that the lithium battery can explode if handled or disposed of improperly.[10] A machine found dead after storage should be checked for battery leakage around the holder before anything else; lithium leakage is cleaned with bicarbonate, not vinegar. See Battery Explosion, Capacitor or Corrosion Damage.

Logic board capacitors

[edit | edit source]

Recap-a-Mac's annotated photograph marks ten 47 µF 16 V surface-mount electrolytics on the logic board.[11] For the signs of failure see Capacitor Failure Symptoms; for the recap see Macintosh Centris 610 Capacitor Replacement Guide.

[edit | edit source]

References

[edit | edit source]
  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Apple Computer, Service Source: Macintosh Quadra 610 / Centris 610 / WS 60, Troubleshooting, pp. 1-11 (PDF pp. 19-29). Hosted as File:Quadra.centris_610.ws_60.pdf; see Macintosh Quadra 610/ Centris 610/WS 60 Service Source.
  2. ↑ Apple Computer, Developer Note: Macintosh Centris 610, Macintosh Centris 650, and Macintosh Quadra 800 Computers (1993), Table 3-2, p. 32 (PDF p. 44). Hosted as File:Macintosh Centris 610 Centris 650 and Quadra 800 Developer Note.pdf.
  3. ↑ Service Source: Macintosh Quadra 610 / Centris 610 / WS 60, Exploded View (PDF p. 103).
  4. ↑ Macintosh Centris / Quadra 610 / 660AV PSU Cap Kit - ASTEC AA16990, Console5—link(accessed 2026-09-30)
  5. ↑ Sad Mac Error Codes, expanded format and class-code tables (original research of this wiki).
  6. ↑ Developer Note: Centris 610, Centris 650, Quadra 800, "SCSI Bus and Termination", pp. 18-19 (PDF pp. 30-31).
  7. ↑ Service Source: Macintosh Quadra 610 / Centris 610 / WS 60, Specifications, I/O Interfaces, p. 6 (PDF p. 10).
  8. ↑ Service Source: Macintosh Quadra 610 / Centris 610 / WS 60, Specifications, I/O Devices, p. 8 (PDF p. 12).
  9. ↑ Macintosh Centris 610: Technical Specifications, Apple—link(accessed 2026-09-30)
  10. ↑ 10.0 10.1 Service Source: Macintosh Quadra 610 / Centris 610 / WS 60, Additional Procedures, Battery Verification, p. 2 (PDF p. 94).
  11. ↑ Macintosh Quadra 610, Recap-a-Mac—link(accessed 2026-09-30)
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