Quoted from bimm25i:
I have fixed 2 issues in mine that seem to be common problems.
The car crush flipper wasn't working, and trying to manually fire the transistor also didnt work.
Found "Relay S" under the playfield near the right slingshot had become mechanically bound up and needed to be repositioned, fired up the game and the car crash worked great!!
The playfield flashers were all out, i again, tried grounding the transistor tabs to test and got nothing. Looking at the schematic, ALL of the playfield flashers route through a 0.33 ohm.5 watt reaistor. I found the resistor UNDER the playfield near the very back (mid-left), took a little searching to find it, and it was burnt to a crisp! Replaced it, all flashers are ok but 1was stuck on (under balrog plastic, poor guy has a gross burn on his face from the previous owner before the resistor cooked itself). I changed the stuck transistor with a new 12N10 and everything is working!!! Now I'm waiting for the leds to show up from comet and I've got what I hear is going to be a bear of a teardown/shop coming up.
What's the story on pulling the mylar on these? Is there a high risk of peeling up paint while doing so?
Congrats on getting your machine home in one piece! Sounds like you're making quick work of fixing it up. Just wait until you replace those flashers with blue leds all around, it's so nice. I also recommend getting the alternate translite, but that's just personal preference.
To answer your question, I have not attempted to remove any mylar from my machine. It still has the original. I'm sure someone else can chime in on that.