Anybody familiar with these? Schematic attached. Usually small 22uF/10uF caps are bad but here it was almost not used so they are still OK. Overload LED with PWR LED are blinking, that usually means shortd transistors and indeed, Q3 and Q4 were bad. But no luck after replacement. I've also swapped all four relays from different ditched unit, no change. Other semiconductors measure fine.
I am thinking maybe shorted T1 transformer on the board? The iron transformer is not the problem, tried different one too.
I am thinking maybe shorted T1 transformer on the board? The iron transformer is not the problem, tried different one too.
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