Blue Angel problem

[Ivabiggun]

Hi, this is my first post here. I hope someone can help. I was playing my BA using a Marshall Power Brake and the amp vol about 7-8, when I noticed that the pilot light went out. I should mention that I forgot to change the PB from 16 to 8 ohms. The first thing I checked was the fuse and it was blown. I replaced it with the proper rating and it blew again. Mesa tech support suggested I remove the power tubes which I did. I removed the chassis before I plugged it in again. When I turned it on again after removing the tubes smoke came from the PCB. It appeared to come from what looks to me like a round yellow cap on the edge of the board. Someone correct me if I am wrong, but I think this is a MOV for spike protection. There is no carbon on the tube sockets or burn marks anywhere on the PCB. Any help would be appreciated.

Thanks,
Ivabiggun

 

[Charlie]

According to the manual for my F-50 running an 8 ohm speaker output into a 16 ohm load is a safe mismatch. Did you switch the power brake from 16 to 8 while the amp was running? I've heard that can be a bad thing to do.

If the PCB was smoking it sounds like it might be time to take it to a tech.

:?