Hi, 

I have a MP573 on my bench (version 1.3). It worked good for years and now it powers up but doesnt have sound.

Voltages are correct as per the setup and assembly instructions.
No shorts.

I notice the Relay was acting weird and somewhat faulty and ordered a new one (not installed yet). Resistance on the coil is varying a lot.

Meanwhile I injected a signal into the pin 7 of the input transformer and get sound normally, but if i inject into pin 2 I get no sound. 

Resistances on the transformer (installed):
2-4: 24 ohms
3-5: 22 MEG (definetely weird)
7-9: 126 ohms
8-10: 127 ohms


Resistances on the transformer (not installed):
2-4: 24 ohms
3-5: open (dead for sure)
7-9: 136 ohms
8-10: 137 ohms

I think this transformer is cooked. Is there another way to be 100% sure?