Some progress...
I've now discovered that the keyboard quite often isn't detected on power-on, giving the beep of death.
Other times, it can be detected on power-on but either Break doesn't work but all other keys do, or Break is the only key that works.
By shear luck, I've discovered that pressing down on the VidProc's heatsink, both allows it to start up reliably and also cures any non-responsive keys.
So, I've guessing there's a dry joint somewhere and the pressure causes sufficient motherboard flex to fix it - probably cause by inserting and removing the motherboard so many times.
Anyone with a better knowledge of the motherboard layout than mine (not exactly difficult) got any cunning tips on where to go hunting?
Or am i barking up the wrong tree?
I've now discovered that the keyboard quite often isn't detected on power-on, giving the beep of death.
Other times, it can be detected on power-on but either Break doesn't work but all other keys do, or Break is the only key that works.
By shear luck, I've discovered that pressing down on the VidProc's heatsink, both allows it to start up reliably and also cures any non-responsive keys.
So, I've guessing there's a dry joint somewhere and the pressure causes sufficient motherboard flex to fix it - probably cause by inserting and removing the motherboard so many times.
Anyone with a better knowledge of the motherboard layout than mine (not exactly difficult) got any cunning tips on where to go hunting?
Or am i barking up the wrong tree?
Statistics: Posted by Boydie — Sun Nov 17, 2024 11:38 am