![]() It's possible something exceeded the voltage tolerances of one or more of the ASIC pins and killed it. So, go right to the source-check the blanking signal at the ASIC-is it low or high? If it's high, I would guess something could be wrong with the ASIC, since most of the pins from the swapped connectors lead into the ASIC. ![]() ![]() But the signal passes through several components before the ASIC's blanking signal reaches the LED, so there could be a potential problem along that path. That means the blanking signal isn't being pulled low like it should. The top LED (D19) is stuck on, which it shouldn't be. Looking at the connectors, there's nothing that should be carrying significant voltage. There are no solder bridges and the pads were nice and clean on both sides before installing the nvram.Ĭurrently going through all of our pins for battery elimination (30 or so to go). ![]() I clipped the old ram at the chip and removed the pins one at a time, desoldering with my hakko. Swapped NVRAM chip with a known good chip as well. Now I don't know if I made a mistake with the NVRAM install or damaged a board with the ribbon swap. MPU top and bottom leds are solid and middle led is now blinking every second or so. Turned the pin back on and there was no activity at all.Ĭorrected the that mistake but now no joy. I turned the pin off and checked my ribbon cables to double check/reseat my ribbon cables still not realizing that the aux/dmd ribbons were swapped. ![]() When I fired the game up, behavior was obviously weird. When I put the MPU back in a stupidly connected the ribbon cable from Aux PCB Assembly to J201 and the ribbon from the dmd board to the aux PCB connector on the MPU. I installed nvram on 7 pins today (totan, mm, ijpa, hurricane, cc, ww, and DM). ![]()
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