Palatine, IL
I think you answered your own question. No meaningful voltage at TP1 is your problem. The other voltages are good.
Three possibilities here, F1 is blown, BR1 is bad, solder connection to BR1 is open.
Check F1 with a meter to be sure, don't rule out the possibility the fuse clips themselves have worn out.
Inspect the solder connections to the bridge, if in doubt, resolder them.
As a last resort, replace BR1. Most like that is the problem but removing the board and replacing the bridge is a tough job for a newbie so I would exhaust the other possibilities before that.
