A1200 green screen

[bbond007]

not much help but:

remove everything from the 1200's mb, accel (even the floppy cable) , hopefully you get purple kickstart screen, then start adding stuff back...

sounds silly, but mine has done unexplained stuff like that before refusing to boot.

in every case so far its come back from the dead with that procedure.

[bbond007]

hey dougal,

yep i tried that first. MY aca1230 has been disconnected - i wanna keep that safe from my dying 1200.

Next i tried removing the 3.1 roms and reverting to my old 3.0 roms and no boot - i think a black screen. So back to 3.1 roms (which i bought new) make sure all legs are connected to rom socket and rom chips are fitted correct order and displaced to the right in the socket...

Change PSU, no difference.

Still green screen, i see the chip ram is soldered in so difficult to change that, is my rev 2b deceased? :confused:

How do i check whether the chip ram is working ok, since green screen points to chip ram, unless i'm missing something here..

Just seen your comment bbond, i will try that tomorrow

oh, wow sounds like you really already remove about everything...

If the a1200 motherboard itself is connected to a known good power supply with good +5 and does not come to the purple workbench animation and there is nothing visibly  damaged or missing on the motherboard then it is definitely way beyond my repairing skill level