Black Screen on A500+ with Keyboard attached

[Amicol]

Hi All,

just looking for help fixing my A500+ 'Rock Lobster'.

After being left for a while in the cupboard, I decided to give it a spin, but to my dismay it would not boot (black screen).

I eventually worked out that it boots fine with the keyboard detached. I searched the net and found that changing the Keyboard PCB should solve the problem.

Received a replacement from Airey36 on Fleabay, but this made no difference. It must be some component on the main board.

Can anyone help me troubleshoot this??

Cheers!

[Amicol]

It's ok peeps, I've tracked down the problem.

Checked the voltage 'under load' of the PSU and it's kicking out 6.2v. Swapped the PSU from my A1200 and it works fine :-)

Is there any way of repairing the faulty PSU from my A500?
It is the old 'heavy' type:
input 240V ~50 Hz 60W
output +5V 4.3A +12 1A

[Bprepared]

RetroGameModz on youtube has a video about repairing a A500 PSU, perhaps give that a watch.

[Amicol]

Thanks for that, interesting video.
Unfortunately mine is the older type PSU. I'll search around to see if there is a video on that one.

Glad my A500+ is OK though! That over voltage could have killed it...

[Daedalus]

It should be possible to gut it and replace the insides with an industrial module such as the Meanwell offerings. That'll give you a modern, efficient PSU well capable of powering your Amiga.

[Amicol]

Originally Posted by Daedalus

It should be possible to gut it and replace the insides with an industrial module such as the Meanwell offerings. That'll give you a modern, efficient PSU well capable of powering your Amiga.

Thanks for this!
I have just ordered a Mean Well RT-50B which I understand fits nicely in the old case.