[JPK]

Check the usual suspects:
Forgotten solder joint,
Bad solder joint (reflow suspicious joints),
Reversed components (transformer,s electrolytics, diodes, transistors, IC's). In case of IC's, probably destroyed, better replace,
Flipped IC's or transistors,
Trim all the component leads and test pins as short as possible. Nothing must touch the chassis plate.


Check the DC voltages:
Check the supply voltages as described in the setup guide. 
Check that TP3 against 0V is between -10V and -11V.
Connect the voltmeter black probe to TP3 and check the DC voltages A to G shown in the attached picture.

Check the side chain:
Set the compressor as described in step 9 of the setup guide.
Remove the jumper on JMP1.
Inject a 1VAC sine signal into the input.

Threshold switch position		TP4 & TP5 AC voltage		JMP1 pin1 DC voltage
+6dB		0.11V		0.14V
0dB		0.22V		3V
-6dB		0.45V		10.8V
-21dB		2.4V		15V