exxos's Atari, Amiga & retro forum

rubber_jonnie wrote: 08 Mar 2022 15:45 What is it doing right now then? What are the symptoms, if you replaced the ROM, RAM and CPU then there's not a lot left.

Mine needed a CPU and VLA81.

Actually, I need to correct myself. I think its the curse of the single wipe sockets.....

Please Stand By...

And


The screen is flickering every 5 seconds or so, probably due to this back porch mod but all good now :D

PhilC wrote: 08 Mar 2022 16:25 And

20220308_162337.jpg

The screen is flickering every 5 seconds or so, probably due to this back porch mod but all good now :D

:girldance: :girldance: :girldance:

If you have a back porch mod, it may be clashing with the VLA81, worth checking out the manual and dip switch settings.

As for single wipe sockets, I like to bin them ASAP!!

@rubber_jonnie yes it looks like it was clashing.

Now going to bin the other two single wipe sockets and we should be good to go.

:cheer: :yay: :dualthumbup: :girldance:

PhilC wrote: 08 Mar 2022 16:35 @rubber_jonnie yes it looks like it was clashing.

Now going to bin the other two single wipe sockets and we should be good to go.

:cheer: :cheer: :cheer:

And a couple of dual wipe socket replacements and now we are up and running, although next was to test the Memopak 16k ram pack, which you've guessed it, doesn't work :lol:

PhilC wrote: 08 Mar 2022 19:56 And a couple of dual wipe socket replacements and now we are up and running, although next was to test the Memopak 16k ram pack, which you've guessed it, doesn't work :lol:

I guarantee it's the edge connector, give it a clean with IPA and a spot of contact cleaner and she'll be right 😁

rubber_jonnie wrote: 08 Mar 2022 20:29

PhilC wrote: 08 Mar 2022 19:56 And a couple of dual wipe socket replacements and now we are up and running, although next was to test the Memopak 16k ram pack, which you've guessed it, doesn't work :lol:

I guarantee its the edge connector, give it a clean with IPA and a spot of contact cleaner and she'll be right 😁

Yeah I will give that a try but also ha ve a 32k ram chip coming for the internal expansion as well.

The screen flickering was actually due to one of the electrolytic caps, so I'll get those replaced as soon as possible but looking good so far.

I would never have dreamed of a ZX81 on a VGA screen back when I was 11.