Doepfer

Hello,

I power up my Doepfer G6 with "standard" power supply (0.6 A), than it works 
for a few minutes, than it dies. Sometimes gentle tap will bring it back to 
life, sometimes it requires firm shake.

Is there any place on power supply that I could check myself for loose cable 
(without killing myself), before taking it to my Doepfer distributor?

Is there any chance that third-party module I had at the time, and that was 
failing on and off by itself (loose connection on the module itself) could 
affect the power supply? Sorry if this question is stupid, I am really 
clueless when it comes to electronics.

Regards,

Zoran