Quoted from MLmotorsport:Tested BR5 and thats what I have - open between - & ~
From here I'll probably need someone with more experience and tools than me to fix it.
Thanks for the help!
It's a no-brainer (for me at least) to just shotgun replace all of the bridge rectifiers on the pre-wpc95 games. There's almost no risk because you can cut the old ones off from above the PCB and easily remove the remaining legs, and they are like $5 each. Put new ones in and forget about them for another 30 years.