This is an Orange Crush 20L amp. This amp blows fuses within 1/2 second of installing a new one. Just before, it has a brief 60Hz hum. I suspect power supply - specifically rectifier. I'd like to get into it and start probing but that's the issue; I can't get the chassis out.



I removed the 4 screws circled in blue and removed the carrying handle. The WHITE chassis won't come out- it seems like something is holding it on top but I don't see any other screws. I tried to gently pull it towards the back to slide it out but it seems to he held fast.

As far as the RED circled screws that's even more of a mystery because after removing them, I can't get the orange panel they are in loose at all. It seems like its glued in which makes me wonder why the screws are even there?

But if I can get the chassis loose that should be all I need. I can pry it back slightly and can tell its loose on the back- only stuck at the top.

Thanks in advance for advice. It's a very clean looking amp so I didn't wanna get too aggressive with removing any of the hardware..

S