IBM PC Series 300 Troubleshooting Guide: Difference between revisions
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This guide documents fault diagnosis for the '''[[IBM PC Series 300]]''' family — IBM's corporate desktop line from 1994 through 2000. PC Series 300 troubleshooting inherits the '''classic IBM POST numeric error code series''' (161 / 162 / 163 CMOS battery cluster, 2xx memory, 6xx floppy, 17xx hard disk) and adds '''IBM SurePath BIOS''' beep codes plus generation-specific failure modes — particularly the '''CHHSI capacitor plague''' on PC 300PL 6862 / 6892 and the '''EDO vs SDRAM DIMM keying''' trap on the 6577 / 6587 / 6588 / 6589 boards. | This guide documents fault diagnosis for the '''[[IBM PC Series 300]]''' family — IBM's corporate desktop line from 1994 through 2000. PC Series 300 troubleshooting inherits the '''classic IBM POST numeric error code series''' (161 / 162 / 163 CMOS battery cluster, 2xx memory, 6xx floppy, 17xx hard disk) and adds '''IBM SurePath BIOS''' beep codes plus generation-specific failure modes — particularly the '''CHHSI capacitor plague''' on PC 300PL 6862 / 6892 and the '''EDO vs SDRAM DIMM keying''' trap on the 6577 / 6587 / 6588 / 6589 boards. | ||
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# If POST passes but OS won't load: Setup boot device order, then suspect drive. | # If POST passes but OS won't load: Setup boot device order, then suspect drive. | ||
# Run IBM PC 300 diagnostic disk if available, or boot Memtest86+ for memory verification. | # Run IBM PC 300 diagnostic disk if available, or boot Memtest86+ for memory verification. | ||
== ⚠️ Power-supply RIFA capacitor and tantalum shorts == | |||
Two age-related failures are near-universal on this era of IBM hardware: | |||
* '''RIFA mains-filter capacitors''' in the power supply are metallised-paper parts that crack and fail '''short''' with age, producing acrid smoke shortly after power-on. Replace them pre-emptively with modern X2-class parts.<ref name="ibm_rifa">[https://www.minuszerodegrees.net/failure.htm minuszerodegrees.net — IBM failure symptoms]; [https://www.classic-computers.org.nz/blog/2010-11-04-restoring-an-IBM-xt.htm Repairing and Restoring an IBM XT]; and [https://retrorepairsandrefurbs.com/2025/05/15/1983-ibm-pc-5160-xt-power-supply-rebuild-modifications/ Adam's Vintage Computer Restorations]. Source for the RIFA mains-filter capacitor failing short (smoke) and the tantalum capacitors failing short and preventing the PSU from firing.</ref> | |||
* '''Tantalum capacitors''' on the planar (system board) and on ISA cards fail short with age. A shorted tantalum will '''prevent the power supply from starting''' (dead machine, PSU protection latched) — look for a cracked or discoloured tantalum and lift suspect ones to find the short.<ref name="ibm_rifa">[https://www.minuszerodegrees.net/failure.htm minuszerodegrees.net — IBM failure symptoms]; [https://www.classic-computers.org.nz/blog/2010-11-04-restoring-an-IBM-xt.htm Repairing and Restoring an IBM XT]; and [https://retrorepairsandrefurbs.com/2025/05/15/1983-ibm-pc-5160-xt-power-supply-rebuild-modifications/ Adam's Vintage Computer Restorations]. Source for the RIFA mains-filter capacitor failing short (smoke) and the tantalum capacitors failing short and preventing the PSU from firing.</ref> | |||
IBM PC/XT switching supplies also need a '''minimum load''' to start, so a bare supply on the bench may not run without a dummy load.<ref name="ibm_rifa">[https://www.minuszerodegrees.net/failure.htm minuszerodegrees.net — IBM failure symptoms]; [https://www.classic-computers.org.nz/blog/2010-11-04-restoring-an-IBM-xt.htm Repairing and Restoring an IBM XT]; and [https://retrorepairsandrefurbs.com/2025/05/15/1983-ibm-pc-5160-xt-power-supply-rebuild-modifications/ Adam's Vintage Computer Restorations]. Source for the RIFA mains-filter capacitor failing short (smoke) and the tantalum capacitors failing short and preventing the PSU from firing.</ref> | |||
== ⚠️ CMOS / RTC battery == | |||
This machine keeps its configuration in battery-backed CMOS, and the battery is a common failure. On AT-class boards the clock/CMOS is often a '''Dallas DS1287/DS12887''' module with the cell sealed inside; it lasts about ten years and then dies, giving '''161 / 163''' CMOS and clock errors at POST (and sometimes spurious floppy-drive errors). PS/2 planars use a rechargeable barrel or pack battery that '''leaks''' and corrodes the board. Replace a dead Dallas module (or rework it with an external coin cell), and on a leaking planar battery remove it and clean the corrosion before it eats the traces.<ref name="ibm_batt">[https://www.classic-computers.org.nz/blog/2009-10-10-renovating-a-dallas-battery-chip.htm Fixing a Flat Dallas DS1287 RTC], Classic Computers; and [https://www.ardent-tool.com/misc/Dallas_Rework.html Reworking Dallas RTC Modules], Ardent Tool. Source for the Dallas DS1287/DS12887 internal-battery death (161/163 CMOS errors) and the leaking planar battery.</ref> | |||
== References == | |||
<references /> | |||
== Related Pages == | == Related Pages == | ||
Latest revision as of 13:06, 16 July 2026
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This guide documents fault diagnosis for the IBM PC Series 300 family — IBM's corporate desktop line from 1994 through 2000. PC Series 300 troubleshooting inherits the classic IBM POST numeric error code series (161 / 162 / 163 CMOS battery cluster, 2xx memory, 6xx floppy, 17xx hard disk) and adds IBM SurePath BIOS beep codes plus generation-specific failure modes — particularly the CHHSI capacitor plague on PC 300PL 6862 / 6892 and the EDO vs SDRAM DIMM keying trap on the 6577 / 6587 / 6588 / 6589 boards.
Reference Documents
[edit | edit source]- PC 300GL 6272 / 6282 TIM d4as3tim.pdf.[1]
- PC 300GL 6268 / 6278 / 6288 TIM d4bp5tim.pdf.[2]
- PC 300GL 6561 / 6591 TIM 6561tim.pdf.[3]
- PC 300PL 6862 / 6892 + PC 300GL 6275 / 6285 TIM 6275tim.pdf.[4]
- PC 365 6589 TIM S84H-0334-01.[5]
- PC 300XL 6588 / IntelliStation M Pro TIM d4aw1bas.pdf.[6]
- IBM PC 300PL driver levels (per-MT BIOS images).[7]
Entering Setup
[edit | edit source]PC Series 300 uses IBM SurePath BIOS (Phoenix-derived). Entry key:
- F1 during the SurePath BIOS splash screen — enter Setup.
Exception: the 6586 uses an Intel-designed planar with Intel / AMI BIOS instead of SurePath — entry is typically Del or F2 rather than F1.[8]
Initial Diagnosis
[edit | edit source]Power on the system and observe in order:
- Power LED lights, fan spins.
- IBM SurePath BIOS splash screen appears.
- Memory count completes.
- Single short beep at end of POST.
- Drive enumeration / boot menu (per Setup boot order).
- OS loads.
If any of these does not happen, stop and diagnose at that stage.
Stage 1 — No Power
[edit | edit source]- Front-panel power button cable seated on planar header? (ATX / NLX soft-power required.)
- Internal PSU green LED on planar lit? If dim or off, +5 VSB regulator on PSU has failed. Replace PSU or recap.
- Voltage selector switch on rear of PSU set correctly (where present).
Stage 2 — Fan Spins But No SurePath Splash / No Video
[edit | edit source]- No POST beep, no video — Capacitor plague on PC 300PL 6862 / 6892 (CHHSI 560 µF 25 V). See IBM PC Series 300 Capacitor Replacement Guide.
- No POST beep, no video — CPU cartridge (Slot 1) not fully clipped in. Reseat.
- Memory training fails — wrong DIMM type. Verify EDO vs SDRAM for your MT.
- Single long beep then nothing — memory module failure.
Stage 3 — Video Present, Halts at SurePath Splash with Error Code
[edit | edit source]Match the code in the table below.
Stage 4 — POST Passes, OS Won't Load
[edit | edit source]- Drive type set correctly in Setup?
- Boot order correct?
- If error code I 99903 05 — no startable device found.
POST Numeric Error Codes
[edit | edit source]PC Series 300 inherits the IBM PC / PS/2 numeric POST series, with PC 300-specific extensions.[9][10]
1xx — Planar / CMOS
[edit | edit source]| Code | Meaning | First-action FRU |
|---|---|---|
| 101 | Interrupt failure | Planar IRQ controller |
| 102 | Timer failure | |
| 110 | Memory parity / general system error | Memory Module, System Board |
| 161 | Battery dead (CMOS configuration empty) | Replace CR2032 |
| 162 | CMOS checksum bad / configuration mismatch | Run Setup; if recurs, replace CR2032 |
| 163 | Time and date not set | Run Setup; if recurs, replace CR2032 |
| 164 | Memory configuration changed | Run Setup |
| 165 | PCI / option ROM mismatch | |
| 173 | Real-time clock failure | RTC chip itself (rare) |
| 1XX | General planar fault | System Board |
2xx — Memory
[edit | edit source]| Code | Meaning |
|---|---|
| 201 | Memory test failure (address shown is failing block) |
| 202 | Memory address line error |
| 203 | Memory address line error |
| 215 | Wrong memory speed |
| 218 | Continuity required in unpopulated slot (rare) |
| 225 | Unsupported memory — wrong type (e.g. SDRAM in EDO slot) |
| 229 | ECC memory error (where supported) |
The 225 code is the canonical PC Series 300 fault when a 3.3 V SDRAM DIMM is fitted in a 5 V EDO slot on the 6577 / 6587 / 6588 / 6589 boards. Pull the wrong module, fit correct EDO DIMMs.
3xx — Keyboard / Mouse
[edit | edit source]- 301 — keyboard not responding.
- 303 — keyboard error.
- 305 — +5 V fuse on planar blown (keyboard / mouse fuse).
- 365 — PS/2 mouse fault.
- 8602 / 8603 — pointing device (mouse) error.
6xx — Floppy
[edit | edit source]- 601 — floppy drive failure.
- 604 — floppy diagnostic error.
- 662 — wrong floppy drive type set in Setup.
8xx — Math Coprocessor
[edit | edit source]- 801 — coprocessor test failed (integrated FPU on Pentium+).
17xx — Hard Disk
[edit | edit source]- 1701 / 1711 — drive 0 fault.
- 1702 — disk controller failure.
- 1730 — drive 1 fault.
- 1782 — disk controller failure on planar.
24xx — Video
[edit | edit source]- 2401 / 2402 — on-planar S3 video failure.
- 2410 / 2420 — graphics adapter failure (add-in card).
I 99903 — Boot
[edit | edit source]- I 99903 01 — Hard disk reset failure.
- I 99903 05 — No startable device — re-check boot sequence in Setup.
POST Beep Codes
[edit | edit source]PC Series 300 uses an IBM SurePath beep-code pattern:[11]
| Pattern | Meaning | First-action FRU |
|---|---|---|
| 1 short | POST passed; normal boot | |
| 1-3-1, 1-3-2 | Memory failure | Memory Module, System Board |
| 1-4-4 | Keyboard / system board | |
| 2-1-1, 2-1-2 | Setup not run / configuration error | Run Setup, System Board |
| 2-2-2 | Video card / on-planar video failure | Video chip, System Board |
| 2-3-2 | Memory module failure | Memory, System Board |
| 2-4-3, 2-4-4 | Run Setup / Memory / System Board | |
| 1 long, 2 short | Display / planar video | |
| 3 short | Memory failure | |
| Continuous | System board fault | |
| Repeating short | Stuck key on keyboard / cable / System Board |
Capacitor Plague Symptoms (PC 300PL 6862 / 6892)
[edit | edit source]The PC 300PL 6862 / 6892 is community-confirmed as a CHHSI capacitor plague victim. Specific fault:
- CHHSI 560 µF / 25 V electrolytics, date codes 1998–1999 (typically WG(M) series), around the VRM and CPU power filtering.[12]
Symptoms:
- System will not POST at all (worst case).
- POSTs intermittently — stable cold, reboots when warm.
- Random reboots under load.
- System fails to leave standby / no response to Wake-on-LAN.
- USB drops out, then PCI / AGP, then crash (staged failure).
Recap procedure: IBM PC Series 300 Capacitor Replacement Guide.
Memory Faults
[edit | edit source]- 201 with address — failing block address shown on screen. Identify the failing DIMM / SIMM.
- 225 — wrong memory type. Specific PC 300 traps:
- 6577 / 6587 DIMM-168 slot — 5 V EDO only. SDRAM will halt at 225.
- 6588 / 6589 / 6598 — 168-pin 3.3 V unbuffered EDO DIMM only. SDRAM physically fits but does not work — halts at 225.
- 6862 / 6892 / 6275 / 6285 — 3.3 V SDRAM DIMM only. EDO will halt at 225.
- 6862 / 6892 hard maximum — 384 MB official memory ceiling; community reports of 512 MB with BIOS update.[13] Larger or unsupported configurations halt at 164 / 225.
Setup Auto-Prompt on Configuration Change
[edit | edit source]The PC 350 / 300XL boards (6586 / 6587 / 6588) trigger a "press F1 for setup" prompt on any configuration change including:
- Unplugging the mouse.
- Unplugging the keyboard.
- Adding or removing a drive.
- Adding or removing memory.
- Adding or removing a PCI card.[14]
This is normal behaviour. Press F1, save the configuration, save and exit Setup, and reboot.
Coppermine Boot Blocker (6862 / 6892)
[edit | edit source]A Pentium III Coppermine 800 MHz (or 866 MHz, or higher) fitted to a 6862 / 6892 board with a pre-update BIOS will fail to POST — the board only certifies up to 550 MHz at factory. Update the IBM SurePath BIOS to the latest image for your specific MT before fitting Coppermine.[15][16]
PowerLeap adapters for Tualatin 1.3 GHz are reported to work on 6862 with updated BIOS.
NLX AGP Card Compatibility (PC 300PL 6862 / 6892)
[edit | edit source]The 6862 / 6892 AGP slot is at the offset NLX position (i.e. the bracket hole is high-mounted rather than low-mounted). Standard ATX AGP cards will physically plug in but the bracket will not align with the chassis I/O cutout — the card is electrically present but unsupported mechanically.
If POST detects no AGP video:
- Boot with a known-good NLX-form AGP card (S3 Trio3D, NVIDIA TNT2 M64 NLX, Matrox MGA-G200 NLX).
- Verify in Setup that "Primary VGA" is set to AGP.
- Run the latest IBM display driver from the kev009 driver-level archive.[17]
Storage Faults
[edit | edit source]- 1701 / 1702 — IDE drive 0 fault. Verify drive type in Setup (LBA enabled?); reseat cable.
- Drive detected as wrong capacity — older SurePath BIOS revisions have known issues with drives > 8.4 GB or > 32 GB. Update BIOS.
- 1782 — disk controller failure on planar.
- Ultra ATA performance below spec on 6275 / 6285 — 80-conductor cable required for UDMA-33.
PSU Faults
[edit | edit source]- Dead — no fans, no green LED — PSU 5 VSB regulator failed or primary side dead. Replace PSU.
- Fans spin briefly, click-retry — Power Good not asserted in 150 ms. PSU fold-back, or shorted planar tantalum, or CHHSI cap plague.
- Boots cold, fails when warm — aged PSU secondary electrolytics.
- Audible whine, smell of fish — X2 mains suppression cap (RIFA-branded) venting.
- Random reboots under load — PSU +12 V rail sag, or planar CHHSI cap failure.
Bundled Monitor Issue (CPSC Recall)
[edit | edit source]A US Consumer Product Safety Commission recall covers the IBM G51 CRT monitor bundled with some PC 300 systems (MT 6541-Q0E/G/N/S, 6541-02E/N/S) for overheating risk.[18] If your PC 300 came as a system with one of these monitors, check the model number against the recall list and contact IBM / Lenovo support for replacement guidance.
Common Field Symptoms
[edit | edit source]- 161 / 162 / 163 at every cold boot — CR2032 dead. Replace cell.
- Won't POST, fans run — CHHSI cap plague on 300PL 6862 / 6892. Recap.
- POSTs OK, won't enter Setup — F1 timing critical; press F1 during SurePath splash (not memory count).
- 225 / 164 on cold boot — wrong-type DIMM or wrong-speed SIMM fitted.
- Random freezes in Windows — VRM caps degrading on Pentium II / III board.
- Wake on LAN not working — +5 VSB rail too low; PSU recap or replace.
- AGP card not detected — wrong form factor (ATX AGP in NLX board); chassis bracket misalignment.
- Coppermine 800 MHz won't boot on 6862 / 6892 — BIOS update required.
- SCSI controller fails to enumerate on 300PL — ServeRAID firmware mismatch.
Diagnostic Workflow
[edit | edit source]- Power on; watch for fans, beeps, SurePath splash.
- If no beep / no video: check PSU rails, then inspect for CHHSI caps (300PL).
- If beep code: match to table.
- If numeric POST code: match to table; 161/162/163 → CR2032 replacement.
- Press F1 to enter Setup; verify drive types, boot order, memory configuration.
- If POST passes but OS won't load: Setup boot device order, then suspect drive.
- Run IBM PC 300 diagnostic disk if available, or boot Memtest86+ for memory verification.
⚠️ Power-supply RIFA capacitor and tantalum shorts
[edit | edit source]Two age-related failures are near-universal on this era of IBM hardware:
- RIFA mains-filter capacitors in the power supply are metallised-paper parts that crack and fail short with age, producing acrid smoke shortly after power-on. Replace them pre-emptively with modern X2-class parts.[19]
- Tantalum capacitors on the planar (system board) and on ISA cards fail short with age. A shorted tantalum will prevent the power supply from starting (dead machine, PSU protection latched) — look for a cracked or discoloured tantalum and lift suspect ones to find the short.[19]
IBM PC/XT switching supplies also need a minimum load to start, so a bare supply on the bench may not run without a dummy load.[19]
⚠️ CMOS / RTC battery
[edit | edit source]This machine keeps its configuration in battery-backed CMOS, and the battery is a common failure. On AT-class boards the clock/CMOS is often a Dallas DS1287/DS12887 module with the cell sealed inside; it lasts about ten years and then dies, giving 161 / 163 CMOS and clock errors at POST (and sometimes spurious floppy-drive errors). PS/2 planars use a rechargeable barrel or pack battery that leaks and corrodes the board. Replace a dead Dallas module (or rework it with an external coin cell), and on a leaking planar battery remove it and clean the corrosion before it eats the traces.[20]
References
[edit | edit source]- ↑ http://ps-2.kev009.com/pccbbs/commercial_desktop/d4as3tim.pdf
- ↑ https://ftpmirror.infania.net/sites/pccbbs/commercial_desktop/d4bp5tim.pdf
- ↑ http://ps-2.kev009.com/pccbbs/commercial_desktop/6561tim.pdf
- ↑ http://ps-2.kev009.com/pccbbs/commercial_desktop/6275tim.pdf
- ↑ http://ps-2.kev009.com/pccbbs/commercial_desktop/s84h0334.pdf
- ↑ http://ps-2.kev009.com/pccbbs/intellistation/d4aw1bas.pdf
- ↑ https://www.infania.net/misc/pcpartnerinfo/ctstips/259a.html
- ↑ https://en.wikipedia.org/wiki/IBM_PC_Series
- ↑ https://www.ibm.com/support/pages/troubleshooting-post-numeric-error-codes
- ↑ http://ps-2.kev009.com/pcpartnerinfo/ctstips/ad96.htm
- ↑ http://ps-2.kev009.com/pcpartnerinfo/ctstips/ad96.htm
- ↑ https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-desktop-motherboards-graphics-cards-and-pc-peripherals/86515-ibm-300pl
- ↑ https://ancientelectronics.wordpress.com/2020/11/21/ibm-pl300-type-6862/
- ↑ https://ancientelectronics.wordpress.com/2021/12/16/ibm-pc-300xl-model-6588/
- ↑ https://ancientelectronics.wordpress.com/2020/11/21/ibm-pl300-type-6862/
- ↑ https://www.infania.net/misc/pcpartnerinfo/ctstips/259a.html
- ↑ https://www.infania.net/misc/pcpartnerinfo/ctstips/259a.html
- ↑ http://web.archive.org/web/20030803071351/https:/www.cpsc.gov/cpscpub/prerel/prhtml03/03088.html
- ↑ 19.0 19.1 19.2 minuszerodegrees.net — IBM failure symptoms; Repairing and Restoring an IBM XT; and Adam's Vintage Computer Restorations. Source for the RIFA mains-filter capacitor failing short (smoke) and the tantalum capacitors failing short and preventing the PSU from firing.
- ↑ Fixing a Flat Dallas DS1287 RTC, Classic Computers; and Reworking Dallas RTC Modules, Ardent Tool. Source for the Dallas DS1287/DS12887 internal-battery death (161/163 CMOS errors) and the leaking planar battery.
Related Pages
[edit | edit source]References
[edit | edit source]- IBM PS/ValuePoint and PC 300 Beep-Code Index, kev009. POST and beep-code reference (PC 300 inherits the same series).
- IBM Support — POST numeric error codes.
- IBM PC 300PL 6862 / 6892 TIM (kev009). Authoritative service manual.
- IBM PC 300GL 6272 / 6282 TIM.
- IBM PC 365 TIM S84H-0334-01.
- IBM PC 300XL / IntelliStation M Pro TIM d4aw1bas.
- IBM PC 300PL 6862 / 6872 / 6892 driver levels. Per-MT BIOS image reference.
- Badcaps.net — IBM PC 300PL recap. CHHSI 560 µF 25 V capacitor plague.
- ancientelectronics — IBM PC 300PL Type 6862. NLX, AGP offset, Coppermine BIOS update.
- ancientelectronics — IBM PC 300XL Model 6588. EDO DIMM keying trap; auto-setup prompt.
- CPSC recall — IBM G51 CRT monitor.