I went to play my Corvette after not playing it for a few months. Everything seemed good and then when I was in a multi-ball it reset. I started a new game and hit both flipper buttons rapidly and it reset again.

I hooked up my DMM to test point 2 on the power driver board and it was at 5.2 volts in attract mode. I left it hooked up and started playing a game and it held steady at 5.2 volts. It reset and I looked up at the DMM and it was still at 5.2.

Any ideas on what I should look at to see what is causing the reset?

I hooked my DMM up to the positive side of c-31 on the mpu board. In attract mode and casual play it held pretty steady at 5.18 volts. If I hammered on the flippers I saw it dropped to 5.14 volts.

I looked at the j114 and j210 connectors. A couple of the contacts in the middle of the j210 connector look slightly tarnished. I will probably go ahead and replace the connectors and housings on both j 214 and j210.

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I was thinking it may have been an issue with the line in power also but the funny thing is that it has been set up this way for years and it just started doing the resets.

I do have a dehumidifier in the basement but it is on the opposite side so I'm not sure it's on the same circuit but I may try to unplug it to see if it changes anything.

I'm not sure I'll have to check.

Which plug connector is the power in?

From the other work that I have seen on this game prior to me getting it I wouldn't be surprised at all either if they thought the new board was all they needed to do.

Yep, I agree, whenever I replace connectors I always swap to trifurcon connectors.

Are there any other power connectors that I should look at and or change? If so, do you know which ones they are?

I finally got back around to working on Corvette.

I replaced the connector and contacts for j210. I played a few games and everything acted normal. I hammered on the flippers with the DMM connected to the positive side of c-31 on the mpu board and I only saw it dropped to 5.18 from 5.20.

I'm not 100% sure that the reset was being caused by that connector. The reason I say that is because my Dirty Harry reset on me a couple weeks ago. When I first got the Dirty Harry it started resetting as soon as I brought it home. It was my very first game and I didn't know how to work on pinball machines so I had a local guy fix the board and it has not reset again until a couple weeks ago. When it reset I started digging. I looked at my line voltage and it was down to 116 volts. I like to have all of my games turned on at the same time. I hooked the DMM up to my surge protector that I have a few of the games plugged into and then I started turning the games off one by one. I picked up approximately 1 volt for every game I turn off. I think that was the cause of the Dirty Harry resetting and maybe part of Corvette resetting but I tried playing Corvette with all of the games on today and it eventually did reset but before I fixed the J210 connector it would reset as soon as I hit the flipper buttons.

So, lesson learned for me is to make sure to check line voltage first because we know low voltage will make the games reset.

Thanks to everyone for all of the diagnostic help!