The diodes are new and tested this amp only had maybe four months of use when I boxed it up back in the 90s. My ms-275 still works but the ms-2125 when I powered it up no power lights or board lights come on. I took it apart and found two diodes melted so replace them and still no power light no boa...

Well last night I replaced the two diodes with TCI 1N 5401 and still no power to leds. I think it's the power caps all looks good what do you guys think.

Thanks
Chris

Thanks Matt let me know. Eulogious I may have to give them a call because I have no way to reference amps-watts-other.

I have an old grey model ms 2125 that needs two diodes. The board location is d-323 & d-311 the diode is marked zm-in-5401-9147. If anyone knows a place to get these please let me know.

Thanks
Chris