RedlandMan
Active member
I purchased a new pcb for my centipede a while back ago and now that a have a test bench i decited to give repairing it a try. So far ive checked all voltages to eproms and cpu. Ive swapped out working cpu and pockey. Removed,cleaned, and checked eproms. I originally had a screen with mostly zeros after everything i did this pic is what i have now. The reset pin to the processor is constantly going low high. I tried disableing the watchdog to try and put it in test mode but no go. That led me to look at L2 outputs on pins 8,9,11 are going low ,high constantly. replaced L2 but no change. I can leave L2 out and i get the same thing on the screen. I checked the pins on L2 against a working board and they are all the same with a logic probe on my non working board with the exceptions of outputs 8,9,11. Im thinking there must be a problem with the input signal at pin 14 on L2 that i wont be able to detect with just a logic probe. Any input would be great. Thanks,luis
