iMac weird G3 video problem

[emuboy]

So my iMac G3 was working fine, then I turned it on the side to swap the hard drive and when I turned it on, the screen showed this, it's very dimm and the colours are all shifted, any idea ?

 

[emuboy]

So, at the moment two things are happening, the first the image is bowed to the left, the second is that if I push the contrast too high the image get distorted and the colours get separated:

"normal"

Distorted:

The image appears correct on the VGA monitor.

Any idea? Caps? cold solder?