Originally Posted by Schoenfeld
If the caps on the mainboard are not 100% OK, you'll experience blinking of the caps lock LED every now and then, keyboard won't work, or the computer will only start properly after a warmup-phase of a few minutes (black screen before that).
It's almost a miracle that our computers still work today. Electrolytic caps are the main reason why electronic devices only barely make it through the warranty period these days.
This is why we eagerly await (FPGA-based?) replacement MoBos from Individual Computers