Agfa T1200 disassembly

I have an Agfa Duoscan T1200 SCSI scanner on the bench that does not
power up when the switch is pressed. Can anyone tell me how to get the
case open so I can check the swtich and transformer?

I have removed the bottom plate and PCB, but can't figure the rest. I
am a qualified electronics tech, but this one has got me stumped. I
don't want to force it.

Thank you for any advice.

Jim Slatter
Slatter Electronics