Need some help here. Playing Simpsons this weekend when the display went out. Turned off machine and turned back on. Noticed a spark from the power board. Turned off immediately. Noticed C7 was leaking. The electrolytic capacitor that leaked was causing arcing, and creating a short between the horizontal trace. I cleaned up and replaced C7 along with the other caps. Noticed that the bridge had gone bad also so replaced a 3501 with a 3504. When installing the board still was arcing (spot shown in pic). Pinwiki shows this problem but can not find the fix. Where should I go from here.

Thank you in advance.

I will check. Do you know the part numbers for the 2 transistors just up from the arcing? Can't find them in the manual. Thank you for responding

It checks out in diode test. NPN

Are TR3 and TR4 the same part? Do you know the part numbers?

Thanks again

Thank you so much!

Here is what i did. Did I Dremel too deep? I can see a little of the trace below. Will it arc there too?
See PICTURE
Thanks again

20201102_091332 (resized).jpg

Should i drop in some clear?

Thank you!

Does this cause other components to fail on the power board by the arcing?

Great News! Arcing has stopped and Everything is in good working order except the Display. Looks like I am missing -100V. Im guessing TR4 is my problem on the power board.

I did not. Is this why I am missing the -100v? ( and have no display)? I just received the two transistors for the 100 and -100v. I was going to change the one that drives the -100v. But your saying that I need to add jumper in the pic you circled above. It didnt look like I went deep enough to cause a problem??