ZX Spectrum issue 2 has only blue tints
Posted: June 28th, 2019, 7:13 am
posted by relo999 on Aug 18, 2015:
Considering Spectrum world fora seem to be dead, or near death, I think this is the best place to ask this.
Recently I've bought a 16k speccy and ran into some issues with it. Faulty keyboard, broken caps, no stable frequency, faulty lower RAM chip, it being 16k, the only being able to put out tints of blue (tested with changing the border colors) and not being able to load programs (LOAD"" only goes to a blank screen). However I assume the last might be related.
I have fixed most issues, new keyboard membrane, recapped, composite mod (not really fixing it but hey), switched out the lower RAM for a modern solution and modern 32k ram upgrade installed.
Now I only have the blue tint issue and loading issue. From the research I've done it might be that the Ferranti chip(ULA5C112E-3) might be faulty and could explain both issues as that chip deals both with loading programs and the video output as far as I could gather. However seeing as those chips are nearly impossible to get I was wondering if the blue tint could be because of another issue (or that I'm just plain wrong). (BTW have tried the colour pods with no luck)
The not loading issue might be because of a bad connection somewhere where which I'd need to check, if it isn't the Ferranti chip.
Considering Spectrum world fora seem to be dead, or near death, I think this is the best place to ask this.
Recently I've bought a 16k speccy and ran into some issues with it. Faulty keyboard, broken caps, no stable frequency, faulty lower RAM chip, it being 16k, the only being able to put out tints of blue (tested with changing the border colors) and not being able to load programs (LOAD"" only goes to a blank screen). However I assume the last might be related.
I have fixed most issues, new keyboard membrane, recapped, composite mod (not really fixing it but hey), switched out the lower RAM for a modern solution and modern 32k ram upgrade installed.
Now I only have the blue tint issue and loading issue. From the research I've done it might be that the Ferranti chip(ULA5C112E-3) might be faulty and could explain both issues as that chip deals both with loading programs and the video output as far as I could gather. However seeing as those chips are nearly impossible to get I was wondering if the blue tint could be because of another issue (or that I'm just plain wrong). (BTW have tried the colour pods with no luck)
The not loading issue might be because of a bad connection somewhere where which I'd need to check, if it isn't the Ferranti chip.