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  1. K

    MV1A watchdog repair

    I'm trying to fix a MV1A. The system is watchdogging with a garbage screen and click (around 3-4 clicks/second). I am using diagrom. 5V is 5.0V. When probing the 68k cpu w. oscilloscope I see: * Datalines is going high then low with each click. Except D4 which is stuck high. * Adresslines...
  2. K

    MV1A component designator "PC"

    This the last of 3 boards that i am working on. It is a MV1A. It is missing a component labeled "PC34" on the underside of the pcb. What does PC stand for? What kind of component is it and what value is it?
  3. K

    Work Ram error mv1fzs

    Got this nice little board. With the stock bios it says work ram error write 5fa0 -> read ffa0. I have tried to interpret this. But now i need help. The first two letters differs should mean that it is the upper chip that is causing the problem. But ... Is that ram1 or ram2? Furthermore. Ive...
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