Need help with increasingly disturbing hardware problem

[Stedy]

Hi,

Have you tried removing and re-inserting the CPU, Kickstart and other socketed chips?

Are you using the original A500 PSU?

I have uploaded a diagnostic disk with repoair utilities on my website at www.ianstedman.co.uk/PU288.DMS

If you uncompress this disk, you can either boot from it or if you are in workbench, run the program 'S17' from the root directory. This is the original C= A500/A2000 diagnostics program.

Good luck,

Ian

[Stedy]

Hi,

Look on the underside of the A500 PSU, what are the ratings?
Some A500 PSUs can only supply 5V @ 2.5 Amps, your system may be demanding too much. Not all A500 PSUs are the same, see here.

I have experienced Emulator 1111 and similar problems when I had 'dirty' connectors on a CPU expansion card. Switch cleaner and isopropyl alcohol on the connectors fixed that.

Finally, an A500 repair/fault finding guide on Aminet,

A500/A200 repairs and
A500 hardware hacks, with some useful tips.

Good luck.

Ian