Sinclair ZX80 / ZX81 / Z88 Forums

Thanks and no worries. I've been busy too it's all understood. Appreciate your help.

Ok. Of course I was stupid enough and missed entire side of one IC. And I swear I checked everything many times before... of course I did. Thanks a lot to Mark for suggesting to do it once again! But the story doesn't end here. After I fixed that issue, the screen finally showed something. But that ...

Thank you Mark! Will do exactly as you said. Will start from simulating a keyboard and cleaning the underside of the board with IPA (why am I thinking of India Pale Ale? :) ). Will then take a picture and post here. To your other points. Yes, soldering may be a problem. It's my first project with ti...

Hello Everybody, Not sure if anybody is able to help but I hope so :) So I assembled Harlequin rev g. Everything is in place, all jumpers are in the right position, but nothing is happening at startup. Nothing at all. I can see some signal coming into TV, because the grey screen changes its color a ...