Zx spectrum +2 grey faulty
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marksmithrun
- Posts: 12
- Joined: Fri Aug 19, 2022 9:25 pm
Zx spectrum +2 grey faulty
Any body any ideas with this board. Have checked all the ram,ula,rom,cpu voltages all good
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Last edited by marksmithrun on Thu Jun 15, 2023 11:23 pm, edited 1 time in total.
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1024MAK
- Posts: 5118
- Joined: Mon Sep 26, 2011 10:56 am
- Location: Looking forward to summer in Somerset, UK...
Re: Zx spectrum +2 grey faulty
Well, it would help if you provide as much detail as possible.
For example, what are the symptoms?
You say you have checked “voltages all good” but don’t say which ones and what the results were.
How have you checked the RAM, ULA, ROM and CPU?
Mark
For example, what are the symptoms?
You say you have checked “voltages all good” but don’t say which ones and what the results were.
How have you checked the RAM, ULA, ROM and CPU?
Mark
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.
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marksmithrun
- Posts: 12
- Joined: Fri Aug 19, 2022 9:25 pm
Re: Zx spectrum +2 grey faulty
Hi removed and checked ram, tried cpu,rom and ula in working board all good