Sounds like you have a broken PCB track, or a broken through-hole somewhere.
Mark
Zx spectrum keyboard
-
1024MAK
- Posts: 5118
- Joined: Mon Sep 26, 2011 10:56 am
- Location: Looking forward to summer in Somerset, UK...
Re: Zx spectrum keyboard
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
-
marksmithrun
- Posts: 12
- Joined: Fri Aug 19, 2022 9:25 pm
Re: Zx spectrum keyboard
Problem sorted. Bad connection on pin 2 of the rom was the problem. Thanks guys for your help