My A1200 is DYING! Random crashes, HELP!

[anakirob]

(one of) My A1200's has recently started crashing at random intervals, and provides me with random guru's (one started with C86E, instead of 8000!).

Sometimes I get a yellow screen (I know what this means) on boot.
Sometimes I get no video and/or audio signal (but video returns when I reset?!).
And sometimes it won't start @ all, although I still get the power LED.

Can anyone please, PLEASE, HELP ME?!

[anakirob]

Thanks guys. but I tried this already before I even started the thread!

I was looking through my old CU collection and it says random crashes are indicative of faulty CIA timers, can anyone tell me if this is the only possibility. And how difficult are these CIA's to replace? (I am not scared of solder, but I've never removed chips from a PCB before)

[anakirob]

Yup, it was a dodgy memory sim! I had 2x4mb, i took them both out and it works. Now I have to work out which one was the problem.

I have (several) a500 PSU's. So that's not a prob.

Thanks to everybody for all your help.