Crashing A1200

[Homer]

Yup, sounds like the death of your PSU. That happened to me when I connected an accelerator and a hard drive. Can you test it with an a500 PSU (slightly more powerful) or borrow one to try ?
You can prove if its overheating by sitting it on an unfeasibly large household electric fan with the trapdoor off and see what happens then !
Oh, and have a :pint: , it always helps  :crazy:

[Homer]

Motorollin, I disagree since when mine went, it damaged the PSU such that it would drop the power rails intermittantly. I stuck an oscilloscope on it at the time to try to work out why it kept crashing. Even with everything disconnected it still did the same.
Best bet and simplest too, is to try a different psu.
Anyway, have a :pint:  :-)

[Homer]

Yup, I think that was the most normal death for an A1200 psu. Intermittant power rails ! I tried slaving in a pc psu and it worked perfectly :-)
Still does ten years later ! Its sat next to me as I write  :-D
Anyway, thats why I suggest trying another Amiga psu since its just so easy to do ! Good luck :pint:

[Homer]

Might be worth mentioning where you live to see if you can borrow one for fault finding :-) Much cheaper than buying one !

[Homer]

If it carries on working well, it would be worth thinking in the long term about a higher power psu, especially if you wish to expand it more (as explained in other responses - the A500 psu will slowly overload and may eventually die the same way as the weaker A1200 psu). You will find that different hard drives can take very different amounts of current, so the simplest change will throw you over the overcurrent edge again !
I don't know if anybody would be interested in the main body of your A1200 psu, I also chopped the lead off mine before it went in the bin ! (Take note of the pin outs which if I remember correctly are shown on the case).
Could be worth looking around for a PC AT PSU which you would probably find in your friends and family's throw away pc's !!!
Good luck :pint:

[Homer]

Nice idea Brian, I didn't think of changing the internals ! Didn't matter to me as I was thinking of putting mine in a tower case at the time, which simply meant I tried the new AT psu and it all worked correctly  :-D

[Homer]

Mafoo: Absolutely ! Just remember that these standard psu's were not designed for long term overcurrents due to unexpected extra devices being fitted to greatly expanded machines. This includes using an A500 psu on an a1200. It is still a short term fix for an ongoing problem. Plan early and minimise your data loss !
Good luck  :pint: