[Kind of a "wanted" ad, kind of a "for sale" ad...]
Wanted: repair help on a Twilight Zone (or a buyer?) in Los Angeles / Orange County.
Summary below. PM me & I'll fill in details as needed.
Bought it about 1.5 years ago.
Had a few electrical gremlins from the time that I bought it.
Some gremlins sorted out, others remain, others worsened.
- Audio volume spontaneous changes (seems resolved)
- Audio crackle sometimes on some sounds (seems mostly resolved)
- Switch matrix blows U20 on the MPU PCB (unresolved)
- Occasional resets (seems resolved)
- Clock optos pooped out (unresolved but straightforward to get a new aftermarket board)
Had to move earlier this year, put it up for possible sale or for pinsitting & fixin' rather than putting it in a storage unit:
A friend took it in & generously put much labor into it. He cleared up some issues but has thrown in the towel on the switch matrix after ruling out many culprits. The frustrating parts of his & my troubleshooting included:
- we could sometimes play hours straight or play it fine off & on for weeks before it would fail, but other times it would blow U20 just minutes into the first game after putting a fresh chip in U20
- different rows & columns of the switch matrix go out when it fails--usually certain ones, but not always
- it fails under different conditions (no certain switch/coil/mode is the consistent culprit)
- it fails even when having disabled many parts of the game, eliminating them as culprits (coin door connector at the coin door, mini PF connector, magnets, all flasher bulbs removed, Great Lakes opto board unplugged, clock unplugged)
- we visually inspected all of the wiring, I removed the tight factory cable ties, & I replaced them with looser cable ties in case there was a short inside a bundle
The culmination of his efforts points to either the backbox board(s) themselves having issues or there being something in the flashers (wiring, socket, connectors, or...?).
Which brings us to today, which feels like April all over again. :\ I'm not into my new home yet, I haven't a lick of time these days to put into further troubleshooting, & I'd like to get the machine out my friend's home. He's been more than patient & generous.
So, I'm looking for a buyer or, preferably, somebody who can tackle the troubleshooting & repair it (and be compensated fairly for your efforts).
Any WPC repair experts?
The next steps in our troubleshooting (had we the resources) would be:
- To swap the boardset into another WPC machine & see if the problem stays in this game or moves (determines if PCBs are the problem)
- To unplug even more items (we didn't outright unplug the flasher wiring at the backbox PCB--we unsocketed all flasher bulbs) & patiently test a game that's a bit boring b/c much of it is disabled.
Thanks for reading.
Please reply via PM. I haven't had time to look at Pinside much in the last 5 months... =(