Sinclair ZX80 / ZX81 / Z88 Forums

Well now I don't have the cursor anymore, just the white screen. That can't be good..

I tried to take a clearer photo. You should be able to see what's going on in this one. I pressed the "goto" key, and you can barely see what the text on screen is.

Thanks for your reply.

I can see a distorted text cursor at the bottom of the screen when the RAM module isn't plugged in. Reading the characters I type in is possible, but difficult. Whenever the RAM module is plugged in, moving it slightly up or down changes the output significantly.

Hi. I recently bought a ZX81 on eBay. It turns on ok, but the output image is distorted. I clueless about electronics in general and the gear inside the ZX81. I've attached a couple of the image on screen. The first one is without the ram expansion plugged in, the second on with. The TV set is an ol...

Hey people!

I've never actually owned a ZX81, but my uncle borrowed one in the early 80s. I had great fun playing with it. I recently bought one on eBay and I'm trying to get it up and running.

See you around, friends!

Thomas