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General Category => Other retro => Topic started by: nicf82 on 23:35, 20 November 22

Title: Broken A4000
Post by: nicf82 on 23:35, 20 November 22
Hi

I just acquired an A4000 today and when I got it home and switched it on, I got horizontally scrolling garbled output on the monitor. After a reset I got a SUPERVISOR prompt, so I thought great ;D it works, and left it a few hours.

Switching I back on I was back to the scrolling nonsense, and no amount of resetting or fiddling with the monitor would fix it. I tried a LCD VGA monitor and got no output at all, so back to the CRT and it was now even worse with no output at all! :( Something getting progressively worse?

I snipped out the CMOS battery, although there was not much sign of corrosion, maybe a tiny bit on the legs but it hadn't destroyed anything. I still have not replaced it but intend to soon. In the mean time I have been holding DEL on boot to reset the CMOS.

I am able to blind type in BASIC SOUND commands and hear them, so it seems to be running ok! Its just the display - any Ideas what I can do do diagnose and fix this problem?

Cheers!
nf82
Title: Re: Broken A4000
Post by: Bryce on 09:26, 21 November 22
Hi nicf82,
     as this is an Amstrad forum I have to ask... Are you talking about an Amiga A4000? I have no idea what else it could be, but you need to give more details than just A4000 when you're not on an Amiga forum.

Bryce.
Title: Re: Broken A4000
Post by: eto on 09:35, 21 November 22
Sounds more like Archimedes 4000.
Title: Re: Broken A4000
Post by: Gryzor on 09:48, 21 November 22
A(mstrad GX)4000 with a battery mod?
Title: Re: Broken A4000
Post by: TotO on 09:54, 21 November 22
I have though about them, or a RTX A4000 graphic card.
Title: Re: Broken A4000
Post by: nicf82 on 10:33, 21 November 22
Sorry, sorry - it is an Acorn A4000
Title: Re: Broken A4000
Post by: MaV on 11:48, 21 November 22
"SUPERVISOR prompt"
"DEL on boot to reset the CMOS"

Judging from these parts of his post, it definitely is about an Acorn Archimedes. But that is just about everything I know about them.

Edit: Damn it, I saw your post too late, nicf82!
Title: Re: Broken A4000
Post by: nicf82 on 11:56, 21 November 22
Yes that's right, it's an Acorn Archimedes A4000 :)
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