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Blackstar HT5RH MKII sound fades to nothing after a few minutes

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davidet1000

Member
Joined 2024
#1
After a few minutes, sound fades to nothing. Clean or gain channels, high or low output makes no difference. A few days later, turn on the amp and get a few minutes of sound again. Speaker and emulated output have no sound/signal, not even hiss. FX loop send has output when the amp works. No visible damage inside. Used contact cleaner to no avail. What could be the problem?
 
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