Sinclair ZX80 / ZX81 / Z88 Forums

Thanks

Hi. Anybody know where I might source a 32k daughter board for an issue 1?

Hi. Have tried with tape decks and android audio. Tried different cables still no joy

Hi guys. While loading a game on my toastrack the loading noise stopped half way through.
Now it is not loading from the ear jack at all. Seems to have gone deaf. Anybody any ideas?

Hi removed and checked ram, tried cpu,rom and ula in working board all good

Any body any ideas with this board. Have checked all the ram,ula,rom,cpu voltages all good

Problem sorted. Bad connection on pin 2 of the rom was the problem. Thanks guys for your help

Thanks again. Found a temporary solution. If I run a small wire between right leg of d4 to pin 2 on the rom all the keys work again

Hi. Tried that and readings were ok. Even swapped d4 out and still the same. Did notice with multimeter there is no power going to d4 while there is to the others

Hi mark thanks for your help. Pin 4 on kb2 is not responding. Does this point to anything?