@tbtorro 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 […]
Tag: repair
Replace Amiga CD32/1200 voltage detector with a TC54VC
Amiga CD32 I often get dead Commodore Amiga CD32 devices on my bench that only give a black screen. In most cases the Voltage Detector / Reset Generator is broken, if that’s the case then machine stays in reset and won’t boot. The original Ricoh ( RH5VA43A, CBM: 391283-02 ) ( datasheet ) voltage detector is […]