Level42
New member
So, a while ago, my Ms. Pac died right during a game.
All of a sudden everything froze and changed color for a couple of seconds and then it was completely black. It appears fully dead on the outside, black screen no sounds.
There is clock signals (I replaced 8A,8B,8C to no avail).
I was feeling all chips for unusual heat. The only one I found suspicious was 7C. I have a working other board-set to compare (this is a hacked Pac board with Ms.Pac attack on it) so I crossed 7F between the boards. No improvement on the dead-board, and the other board worked, although the colors were pretty weird. (not the normal Ms.Pac Attack colors).
I probed 7F with the logic tester and all ports seemed to be low. Checked schematics and checked 3B, no activity on outputs, but also not on inputs, so there must be something wrong further up the line. Haven't had time to do more work.
I just thought it would have been 7F or 3B because 7F was much cooler on the working PCB.
Any suggestions welcome....
All of a sudden everything froze and changed color for a couple of seconds and then it was completely black. It appears fully dead on the outside, black screen no sounds.
There is clock signals (I replaced 8A,8B,8C to no avail).
I was feeling all chips for unusual heat. The only one I found suspicious was 7C. I have a working other board-set to compare (this is a hacked Pac board with Ms.Pac attack on it) so I crossed 7F between the boards. No improvement on the dead-board, and the other board worked, although the colors were pretty weird. (not the normal Ms.Pac Attack colors).
I probed 7F with the logic tester and all ports seemed to be low. Checked schematics and checked 3B, no activity on outputs, but also not on inputs, so there must be something wrong further up the line. Haven't had time to do more work.
I just thought it would have been 7F or 3B because 7F was much cooler on the working PCB.
Any suggestions welcome....
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