Amiga 600 which was constantly rebooting. I got this machine as a repair, someone before me tried to do a recap to the machine.. After that it was not working anymore. First thing I tried was to replace the 555 Timer (U14) and the C612 Capacitor, because this is common problem on an Amiga 600. […]
Black screen on RGB output can be a broken E263R Ferrite Bead (FB200). Monitor won’t get into RGB mode if there is no 5V on pin 23. I have seen several Ferrite Beads that were broken, and have a much higher resistance (impedance). After replacement 5V is restored and we have RGB signal again.
Amiga 600 with HD boot problems. This board had a recap because it leaked from the caps. Some electrolyte leaked under the IDE header and a corroded the pins. Sometimes after reseating the IDE cable it booted, but mostly it didn’t boot. I removed the IDE header cleaned the mess underneath it and placed a […]
CD32 came in for repair, owner accidentally hooked it up to wrong psu.. Result, machine not working anymore.. R801 (0 Ohm) was broken, it was floating between 150 – 1M Ohms. Replaced it with new 0 Ohm resistor and the machine is working again.. tested all main components, and it seems no problems. I found […]
Amiga 600 which didn’t boot. Did some measurements on the 555 timer ic’s, and I saw the trigger threshold was too low, 1,2 Volt. It should be some where around 2,4V. So I guessed the problem should be R611 or C611. Removed both, R611 was good, however C611 was acting like resistor of around 45K […]