Hi;
I am troubleshooting an I,Robot PCB set and when fired up, I get a lot of stray, flashing, misc colors and shapes all over the display but you can see the credit=0 display in there.
I placed the game into test and it gives the error:
Bad Ram
C0 2000 W00 R01
Which indicated that the RAM in location 1C/1D on the video PCB is bad. I did many swaps and finally hooked the board to a known working CPU PCB and it worked perfect so the error is not in fact the RAM on the video PCB but originates from the CPU PCB. I also get the error: vp won't stop.
Has anyone else gone through this before?
Thanks
Jeff
I am troubleshooting an I,Robot PCB set and when fired up, I get a lot of stray, flashing, misc colors and shapes all over the display but you can see the credit=0 display in there.
I placed the game into test and it gives the error:
Bad Ram
C0 2000 W00 R01
Which indicated that the RAM in location 1C/1D on the video PCB is bad. I did many swaps and finally hooked the board to a known working CPU PCB and it worked perfect so the error is not in fact the RAM on the video PCB but originates from the CPU PCB. I also get the error: vp won't stop.
Has anyone else gone through this before?
Thanks
Jeff

