Amp acting up...

toolshed

Member
Messages
915
Got a mesa express 2x12. None of the preamp lights are coming on. The power tubes come on and two of the preamp tubes come on. Fuse is good. What should I check next
 

Jeff Gehring

Gold Supporting Member
Messages
7,209
If none of the LEDs or pilot lamp are illuminating, perhaps you have had a failure of the regulated 12V supply. That would mean take it to a tech.
 
Messages
288
Got a mesa express 2x12. None of the preamp lights are coming on. The power tubes come on and two of the preamp tubes come on. Fuse is good. What should I check next
Yeah,
it seems like the low voltage supply has failed.
Expert soldering is probably required.

Don't try to work on a Mesa amp without test equipment and considerable experience.
 




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