Ampeg BA115HP tuner oscillations

[Zouto]

Hi, checking an oscillating Ampeg BA115HP, I found out that the tuner module creates the oscillation. When I pull its plug from the pcb, the amp works fine. A tuner module replacement is hard to get, so what to do, using the amp without that thing?
Thanks for suggestions
Zouto

[Enzo]

Does the tuner work too? Any chance the tuner is plugged in backwards?

[Zouto]

No, the tuner is plugged in the right way (there's only one right way due to the connector/socket). When oscillating the tuner's leds running to and fro' like crazy, they used to work decently before. Probably U1 A (TL072) went south, but I'm not quite sure, for if it works with the tuner unplugged, it seems to be ok.