I was changing out a kicker switch on TZ. I powered on with the switch hanging to test it, worked great, powered off, then positioned the switch to mount to the PF. While positioning, i think i touched the switch to one of the solenoid lugs and sparks flew. Was probably within 30 secs of powering off. Now all of switch row 3 is out. Any thoughts on where to start? Im dumb with the voltmeter so any test you need me to do will have to be spelled out for me. Possible blown diode?

Whysnow sorry buddy!

TIA!

EDIT: It is switch column 3, not row

Can you explain in stupid people terms for me?

So I see this thread that you created a year ago, but it's all Greek to me.
https://pinside.com/pinball/forum/topic/wpc-ln2803-blowing

This is helpful! Are there any visual signs that a chip is fried? If i pull the board, will there be burnt pins the back?

This must be my issue? Resocket and replace the chip? Where can I get a new one?

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I have 2x uln2803 chips on the way. Hopefully it's as easy as swapping them out.

Replaced the chip and all is good! Whew! Thanks guys!

Thanks to you for giving me a lead on what might have been wrong! But yeah, it was socketed so easy to replace. Probably a common mishap with this machine, as the repair was already made at least once. I'll make sure to give it a good minute or two after power off before I start futzing around next time!