NES audio comes and goes

[djlooka]

I have recently acquired a PAL NES.
Tested it with Super Mario Bros./Duck Hunt and Gauntlet II; it has a nice video output, but after some minutes/seconds the audio goes off.
Sometimes it just comes back, but it's totally random to me (sometimes even resetting doesn't bring it back).

Any ideas?

[imparanoic]

i am guessing based on pc engine duo and pc engine gt/turbo express that the capicators ( cheaply made ) are going or gone, sounds very similar to pc engine duo and pc engine gt/turbo express sound problems as well as master system,

[Fix_Metal]

i am guessing based on pc engine duo and pc engine gt/turbo express that the capicators ( cheaply made ) are going or gone, sounds very similar to pc engine duo and pc engine gt/turbo express sound problems as well as master system,

+1, some failing cap for sure.