Amiga CD32 Laser calibration & replace laser pickup procedure

WARNING! Before you start: I AM NOT RESPONSIBLE FOR ANY DAMAGE TO YOUR Amiga CD32 OR EYES! DON’T LOOK INTO THE LASER (BEAM)!! AVOID DIRECT EYE EXPOSURE!! ALWAYS COVER THE LASER WHEN TESTING/POWERING THE MACHINE!! USE PROTECTIVE GLASSES TO PROTECT YOUR EYES FOR BEING EXPOSED TO THE LASER BEAM!! Only continue with the procedures if […]

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A600 r1.5 WB freezes on doubleclick or sound out

A600 r1.5 boots from HDD or FDD, but locks up immediately when a folder or executable is doubleclicked in WB. Sometimes it would open a folder but would lock up starting a program afterwards. RAM, ports, PCMCIA, mouse, kb, disks all tests fine (booting a diag directly from FDD) but on sound test the system […]

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Amiga problem/fix overview

On this page I give a brief overview of all the fixes I posted to my blog / Knowledgebase. Not all articles are written by me, but also other Amiga repairians.. Not all fixes I ever did are been posted, but this is a good start. If you also want to give contributions to this, […]

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A4000 only 1MB Fast RAM per bank detected when using ATX PSU

While using a converted ATX PSU (or an ATX PSU with an adapter) only 1MB Fast RAM is detected per bank, so 16MB RAM shows as 4MB total, all other functionality is working on the board: Cause: _FAIL (Pin1 – Grey) on the A4000 motherboard power connector is not wired up correctly to the ATX PWR_GOOD […]

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Working Amiga 4000 motherboard freeze then green screen after few minutes

Amiga 4000 motherboard works from cold boot, then freezes after few minutes and shows green screen after reset. Cold boot (after about 5 minutes) would restore the board, then symptoms repeat. No corrosion in the battery area. Solution: U212 controlling CAS/RAS is unusually hot, inputs are OK, but outputs show undefined “half” (pulling low from […]

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