Sinclair ZX80 / ZX81 / Z88 Forums

I'm looking for a ZX81 box, namely the polystyrene inner and cardboard outer cover in a fairly good condition.

Please let me know if you have one to sell.

I've just installed a ZXvid onto my zx81, but I'm not getting any output on the TV. I've re-checked the wiring, soldering etc and all looks ok. I had a K on the screen with the old modulator, so it worked before I removed it. Any ideas?