Ghosts 'n Goblins Voltage Query

[orbit79]

Hi all,

A while ago I picked up a cheap copy of Ghosts 'n Goblins which was totally hosed, but for the price I took a gamble that it was fixable. After a fair bit of work it now works pretty well. One final thing concerns me however, and seems contradictory to most boards I've worked on, and I was wondering if someone with more experience might be able to point me in the right direction. Basically, if I have the voltage at 5v, after about 10 minutes of being on, the graphics will start to flicker reasonably violently. Lowering the voltage to say 4.75-4.8v removes the problem entirely.

I've tested several games on the cabinet without issue, so I don't "think" the power supply is flakey, however it's possible the other games are more resilient. Any thoughts?

Cheers.

[iankellogg]

Is there any chips that are really hot to thetouch? It could be an over heating problem and just lowering the voltage a little bit is just enough of a temp drop to keep everything stable.