Gravitar/Black Widow PCB question....pcb blown by bad big ..

Archived from groups: rec.games.video.arcade.collecting (More info?)

Hi All..

Dug out a black widow boardset...swapped all my chips that are
swappable from my bad gravitar boardset to my working black widow
boardset.

I suspect my gravitar pcb got fried becasue of a bad Big Blue on my
power supply.

The roms on my gravitar work great. After the swap, the board booted
up just fine.

I even replaced each chip one by one and verified each are working.

Now..

where would I start to troubleshoot to see where the damage is done on
the bad pcb? Would I need special equipment aside from using a
multimeter??? I would not mind trying to get my 2 boardsets working.

I have a new big blue on order. When it gets here. I am gonna transfer
a known good working power supply into my gravitar to verify it is not
my audio board that is not baking my pcb's. Then one that is done,
I'll replace the big blue.

Thanks all..