Looking at a few issues for a friend and apologies if they are already covered somewhere in the previous 185 pages!
When game is switched on, the skill shot video sometimes works with the T-Rex going across the screen. After a couple of games, it is as if the video has frozen. Sometimes, it will freeze on the skill shot scene with none or some of the T-Rex. Othertimes, usually ball 3, it is stuck on the score. I have some videos, but am technically challenged as to how to post them here! When it is frozen in the upper part of the dmd, you can see the skill shot text at the bottom scrolling through skill shoot, skill shot amount, ball number player number, so some of the video feed is working.
After shooting the ball and hitting some shots, the video will resume.
Anybody had a similar issue? How did you fix it?
Friend has complained of the game resetting and I have had that happen a couple of times. I have checked the power board test points on the power board and have 5.03v, 10.4 (on the +12) and -14.7 (on the -12), though the latter 2 vary up and down. On the mpu board, the 5v TP has 4.93v. RotorDave has told me to replace the caps on C2 and C7 plus look at the Power supply Bridge rectifier, which I am organising to do. I suspect, these might resolve the resets which have been getting more frequent. When the boards are out, I will check the metal back plate in case that is shorting on a board, though I think this is unlikely given the small amount of time I have tested and with the translite out, it is not getting a lot of heat build up.
Any pointers appreciated.