Korg Mono/Poly

thank you for your suggestions. yes since I've      previously fixed up the key contacts on my polysixes I'm pretty familiar with the procedure.. I just thought that since the lack of triggering was so complete, that maybe there was something else going on.

However, because of the sudden and total lack of audio output... I thought that was maybe a more pressing issue. Sorry if I wasn't clear enough about that in my post. So let's just pretend that this is the complaint. Are there any 'obvious' culprits to look at here?