AV Famicom with NES RGB mod suddenly stopped working?!

[Mr. Onslaught]

My system was working as normal, changed the cart, now it boots into black wavy lines (and the RGB message changes to no sync after a few seconds).

It seems like it has to be internal damage since nothing was physically changed, is this kind of scramble familiar looking enough that I might be able to narrow the issue down? Pretty bummed, no clue where to start! Grateful for any guidance 

http://m.imgur.com/dRTjFzj,8wfVPSQ,UwYUpEi

[Pikkon]

We would need to see the internals.

[Mr. Onslaught]

I'll be taking it apart soon, will post back with pics of the inside. Really hoping the NESRGB board got randomly unseated and just needs to be reinserted!

[chowder]

Do you get any sound?

I've read a couple of accounts of the adapter board having low clearance to the CPU and shorting pins out.  The result of that seems to normally be a completely dead CPU with just a black screen though, but it could be a similar issue I guess.

[Mr. Onslaught]

No sound other than occasional hiss

When I get it open will a Mulitmeter easily tell if the computer is dead? Thanks.