Do you know of a shop that may be able to repair Newer "Maxpower" upgrade cards?
I have a Maxpower G3/466 that recently stopped working. The problem with it is that it will keep the monitor in the "sleep" mode all the time. If I start the computer, the monitor's power light turns green for just a second, then it goes back to orange and the monitor stays sleep. Also, trying to reset PRAM won't work, because pressing and holding the proper keys won't make the computer cycle from on to off and then back to on (nothing happens when holding Option, Command, R, and P).
However, everything works fine if I remove the Maxpower upgrade and replace it with the original Apple 180 MHz CPU card. Resetting PRAM with the Apple card works as it should.