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I'd adjust the vertical and horizontal size via the analogue board, screen is a bit too big.. Check your 5v as well. then fiddle with the yoke magnets in the middle on each side. The easiest way I have found to get the screen size and aspect correct is to use the black and white squares...

The AB is a new old stock and works perfectly with plus board. I suspect the LB maybe memory or? thanks

Thanks have checked this

Hi Brains Trust. 512k bongs and the screen displays expected startup for about a second then black. Anyone experienced this and can head me in the direction of possible culprit/s Cheers

Maybe the smallest drop of light machine oil?

I've done a bit more exploring. I've pulled one apart and the power supply works (yes I am aware that they can bite). Had a good look at the 512k board and it looks good, next I'll give it a good clean up and test. The cases are very basic but I think I'll retro and tidy up and reassemble into...

I plan to get at least one working and then tidy it up as a restored example

Ordered the rgbtohdmi see what happens

Hey thanks for the info fellas

Thanks found Build your own MAC very interesting

Yes Your right need to do some research on TTL to VGA? or some such

On further inspection looks like a CGA socket. @68kPlus your correct came from Epay and I probably paid way too much but was intrigued to see what it was!

What do you think the video socket and board is for?

Some people hated the compact Mac obviously. These are 512k boards with a homebrew VGA adaptor in an old PC type case. I haven't tested them yet. Pull apart and clean/inspect then see what happens.

I got mine to boot after rechecking/soldering all replaced caps and ultrasonic bath.

IIsi shouldn't need a battery to boot.

Any joy with this board?. Getting similar results with mine

Can you post pics of video connection etc?

Nice work

I've also had UE8 actually be faulty giving the same screen pattern