Bullwinkle
Member
Pole Position: I got a heartbeat...but now garbage on the screen
Hi... I've been working on resurrecting a Pole Position for a bit now. here's what I've done:
In addition to the above repairs, I've re-seated all eproms/ram/processors and checked for corrosion. All chips look ok. That being said, as soon as I hit the power, I get the following screen:
Or if I shut down and restart..maybe this...
At one point I had letters repeating horizontally across the screen and scrolling to the left. Anyone have any ideas where I can go from here?
Edit: I've also check voltages on both boards to the +5vdc test points and i have 5.023 to 5.025vdc on all testpoints.
Thanks.
Tom
Hi... I've been working on resurrecting a Pole Position for a bit now. here's what I've done:
In addition to the above repairs, I've re-seated all eproms/ram/processors and checked for corrosion. All chips look ok. That being said, as soon as I hit the power, I get the following screen:
Or if I shut down and restart..maybe this...
At one point I had letters repeating horizontally across the screen and scrolling to the left. Anyone have any ideas where I can go from here?
Edit: I've also check voltages on both boards to the +5vdc test points and i have 5.023 to 5.025vdc on all testpoints.
Thanks.
Tom