Hi Guys
My Williams IJ started acting up, and resetting all of a sudden while playing (Actually i've seen it reset in attract mode also).
Tonight i changed C5, BR2 and Q1 with new components just like the set they sell here: https://www.pinball.co.uk/product/5-volt-rebuild-kit/
Unfortunately it didn't work. After playing for about 3-4 minutes the machine reset. And after that, every time i trigger a coil it resets again.
Before changing the components, some days there could be 4-5 games without any problems, and then the next day it would be impossible to complete a full game. So it's been a little on/off.
Is there a logical next step for me to check now? I am by no means an electronics expert, but i have been able to do most basic repairs until now with lamp columns/rows, coil/flasher drivers and so on... But nothing more fancy than that.
So just wanted to know if there was some quick tips to check out before i give up and load it in the van and ship it off to a pinball repair guy.
I don't know if it's worth mentioning, but i have not been able to trigger the resets by pressing / tapping on any of the cables or chips on or near the CPU board, so i dont think it is just a loose connection.