My Gorgar power supply had a few puffy looking caps so I got a replacement kit from Big Daddy. Everything worked previous to replacement. All the capacitor values were checked and polarity was verified. Upon reinstallation the game works but there is now a loud buzz that sounds like it might be coming from the +5V DC regulator but it's a bit hard to tell. When I pull F1 and start it up the buzzing is completely gone. It's pretty loud. Any idea what I might have messed up, or what to try now? After initially having the buzzing I reflowed the solder on everything with a pin on the board and now I'm stuck.

edit: If I touch the disc capacitor underneath the replaced 100uf capacitor on the left the buzz changes so I guess that might be the source but damn is it loud for coming from that little thing. I tried reflowing that just in case but the problem persists. It looks like the cap says "Z5V 0.1uF DC500V" but it's not very clear. Is this an acceptable substitute: https://www.mouser.com/ProductDetail/Vishay/S104Z93Z5VL83L0R/?qs=MZE%2f3ll%252bp%2fba6C%252bzoK7Jpg%3d%3d

If it's doing the buzzing you think it went bad, or is it just a symptom of a different issue?

I replaced that disc capacitor but still have the buzz. That part does not chance the pitch of the hum when touched like it did before. Is this normal and I just didn't notice it before? The game plays fine but I'm worried something is about to pop.

I was going to replace them but I accidentally orders a kit with a 4700uf cap instead of the 12000uf so I just put the power kit in. The buzz is definitely coming from the power supply board.

I just got a 300. The price gave me some heartburn but there is no substitute for having the right tool for three job. It's amazing.

The hakko is amazing. Expensive, but amazing.

Yeah, that's probably it. Get you some NVRAM or at least a remote holder.

Got a new Alien Poker with a host of problems. One of the bridges was shorted and a few of the power resistors got so hot they desoldered themselves from the board! No fuses ever blew. I've got a new bridge and power resistor kit on the way, is it likely the PIA or any other parts were damaged?

I had the playfield up and heard something fall to the bottom of the cab. I saw the power resistor, not putting 2 and 2 together I picked it up and burned my fingerprints off.

I reflowed everything before I turned it on. Luckily somebody had already done sockets and the 40 pin (which looked good) at some point in its life. Planning on doing the fuses and all that just wondering what the chances were that the 7408s or any other parts were also trashed.