Apple Lisa Troubleshooting - Revision history

Josh: Add representative photo (sourced from Wikimedia Commons, attributed on file page)

2026-07-16T11:52:07Z

Add representative photo (sourced from Wikimedia Commons, attributed on file page)

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Josh: Expand troubleshooting: I/O-board battery bomb, boot error codes (40/57), PSU runs-then-dies, Twiggy drives; cited (LisaFAQ/TinkerDifferent)

2026-07-16T11:14:55Z

Expand troubleshooting: I/O-board battery bomb, boot error codes (40/57), PSU runs-then-dies, Twiggy drives; cited (LisaFAQ/TinkerDifferent)

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 * '''IDEfile''' — ProFile emulator using IDE drives
 * Both provide higher reliability than original Widget drives
 == Related Pages ==

Josh: Create Apple Lisa Troubleshooting page

2026-02-09T15:37:17Z

Create Apple Lisa Troubleshooting page

New page

Troubleshooting is essential for diagnosing and resolving issues with your '''Apple Lisa'''. This guide covers the most common problems encountered with Lisa systems.

== Preliminary Checks ==

Before detailed troubleshooting:
* Verify power outlet is working
* Check that all cables are properly connected
* Ensure the power supply voltage selector (if present) is set correctly for your region
* Allow adequate time for capacitor discharge before internal work (24+ hours)

== No Power / Dead System ==

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|+ '''No Power Diagnostics'''
|-
! Symptom !! Possible Cause !! Recommended Action
|-
| No response when power switched on || Failed RIFA safety capacitors || Inspect and replace RIFA capacitors in power supply
|-
| Clicking or ticking from power supply || Power supply overload or short || Check for shorts on motherboard; replace power supply capacitors
|-
| Trips circuit breaker || Shorted RIFA capacitor || Replace all RIFA safety capacitors immediately
|-
| Power supply smokes || RIFA capacitor failure || Disconnect immediately; replace all safety capacitors
|-
| Intermittent power || Failing electrolytic capacitors || Full power supply recap recommended
|-
| Powers on briefly then shuts off || Power supply protection circuit triggering || Check for shorts; verify output voltages
|}

=== RIFA Capacitor Failure ===
RIFA-brand safety capacitors are the most common cause of Lisa power problems:
* These capacitors absorb moisture over decades and fail catastrophically
* They may emit smoke, loud pops, or acrid smell when failing
* ALWAYS replace preventatively before powering on a long-stored Lisa
* Replace with modern X2-rated capacitors of equivalent value

== Self-Test Error Codes ==

The Lisa displays error codes during its self-test sequence:

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|+ '''Common Lisa Error Codes'''
|-
! Error Code !! Component !! Description
|-
| 10-19 || CPU Board || CPU board failure; check RAM, ROM, or processor
|-
| 20-29 || I/O Board || I/O board error; check IWM, serial ports, or ROM
|-
| 57 || Disk Controller || Disk controller failure on I/O or CPU board
|-
| 70-79 || Memory || Memory card error (icon shows affected slot: MEM1 or MEM2)
|-
| 80-89 || Storage || Hard drive or floppy drive error
|-
| 82 || Widget || Generic Widget drive failure
|}

=== Error 57 (Disk Controller) ===
* Reseat all socketed chips on the I/O board
* Check the IWM (Integrated Woz Machine) chip
* Verify I/O ROM is correct version (H/88 for Lisa 2/10)
* Inspect for cracked solder joints

=== Error 70 (Memory) ===
* The error icon shows which memory slot is affected (MEM1 or MEM2)
* Try each memory card individually
* Clean the edge connector contacts with isopropyl alcohol
* Individual RAM chip testing may be required

=== Error 82 (Widget) ===
* Generic Widget drive failure code
* Widget may require low-level format (no utility publicly available)
* Consider ProFile emulator (X/ProFile, IDEfile) as replacement
* Check Widget cable connections

== Video Problems ==

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|+ '''Display Issues'''
|-
! Symptom !! Possible Cause !! Recommended Action
|-
| No display, system runs || CRT failure or analog board issue || Check CRT connections; test analog board
|-
| Horizontal line only || Vertical deflection failure || Check vertical output IC and capacitors on analog board
|-
| Vertical line only || Horizontal deflection failure || Check horizontal output transistor and flyback
|-
| Image shifted horizontally || H-position adjustment needed || Adjust horizontal position potentiometer
|-
| Garbled/checkered display || Memory or video RAM issue || Test with known-good memory cards
|-
| Bright flash/line at shutdown || Normal CRT behavior || CRT discharge is expected at power-off
|-
| Dim or faded display || CRT aging or brightness adjustment || Adjust brightness; CRT may need replacement
|}

=== CRT Adjustments ===
* Horizontal and vertical position/size controls are on the analog board
* Focus adjustment may be on the flyback transformer
* Always discharge CRT before making adjustments

== Keyboard Problems ==

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|+ '''Keyboard Issues'''
|-
! Symptom !! Possible Cause !! Recommended Action
|-
| No keys working || Keyboard cable disconnected || Check cable connection to I/O board
|-
| Most keys not working || Deteriorated foam pads || Replace capacitive foam and foil pads
|-
| Some keys work, others don't || Individual pad failure || Replace foam/foil on affected keys
|-
| Keyboard error on boot || Keyboard not detected || Check cable; verify keyboard controller chip
|}

=== Foam Pad Replacement ===
The Lisa keyboard uses capacitive foam pads that deteriorate with age:
* Purchase Lisa keyboard foam/foil replacement kit
* Each key requires a new foam pad and conductive foil
* This is the most common Lisa keyboard repair

== Floppy Drive Problems ==

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|+ '''Floppy Drive Issues'''
|-
! Symptom !! Possible Cause !! Recommended Action
|-
| Drive won't accept disk || Seized eject mechanism || Clean and lubricate mechanism with isopropyl alcohol
|-
| No disk spinning || Motor or motor controller failure || Check TA7259 motor IC; may require spindle repair
|-
| Read errors || Dirty heads or alignment || Clean heads; check for alignment issues
|-
| Intermittent reads || Failing capacitors near drive controller || Check/replace associated capacitors
|}

=== Floppy Emu Compatibility ===
* FloppyEmu can be used with Lisa systems
* Requires appropriate cable adapter
* External connection may require modification

== Widget Drive Problems ==

The Widget (internal hard drive in Lisa 2/10) has known reliability issues:

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|+ '''Widget Issues'''
|-
! Symptom !! Possible Cause !! Recommended Action
|-
| Widget not recognized || Cable connection or controller failure || Check cables; verify controller on I/O board
|-
| Error 82 on boot || Generic Widget failure || Drive may need replacement with ProFile emulator
|-
| Widget spins but won't boot || Corrupted data or head issues || Attempt boot from floppy; consider drive replacement
|-
| Clicking sounds from Widget || Head or mechanism failure || Drive likely requires replacement
|}

=== ProFile Emulator Options ===
Modern alternatives to the Widget drive:
* '''X/ProFile''' — Drop-in Widget replacement using CompactFlash
* '''IDEfile''' — ProFile emulator using IDE drives
* Both provide higher reliability than original Widget drives

== Related Pages ==
* [[Apple Lisa]]
* [[Apple Lisa General Maintenance]]
* [[Apple Lisa Capacitor Replacement Guide]]
* [[CRT Discharge Procedure]]

[[Category:Apple Vintage Computers]]
[[Category:Apple Troubleshooting Guides]]