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Messages - Eratosthenes

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NEW MEMBERS - SIGN IN HERE PLEASE / Now I'm here...
« on: April 02, 2019, 07:20:18 PM »
Hello everybody,

as a collector of English 8-Bit computers it's some kind of an issue if something goes wrong here where I live...

Being a child of the 80th the first impression and the first contact to a real computer was fiddling around with the ZX81. My first own computer was a 48k Spectrum. I'm not sure when I got it. It was Christmas 82 or Christmas 83. Even though I'm really keen to find out, I'm not sure exactly when it was.

(Having burried so many years in my bedroom with the Speccie, it isn't that easy to find out when exactly what has happened... ;-> )

I have registered here as I have a mayor issue on an Acorn Electron. Somebody posted the exact same problem here in the forum so I responded to get some more info. Even though this has been posted some time ago I hope that somebody can help me.

THNX 4 your support and have a lot of fun...

MfL
der Eratosthenes

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No text, please PN... :D

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HARDWARE/SYSTEMS DISCUSSION / Re: acorn electron gone faulty
« on: April 02, 2019, 06:09:13 PM »
Hi everybody!

As a newbie it's nice to be here...

Even though this topic is older it discribes exactly how my Elk behaves.

The story:
Last weekend I received an "as new" Elk (see photo below if I'm allowed to upload it. The photo has been taken before(!) I cleaned the computer).

Before running it I checked the voltage of the PSU board. +5V and -5V are OK, 19V are not OK as I'm using a DC PSU to run the Elk...
As far as I've read (and as far as I've understood reading the Service Manual) this is OK as 19V are only available on the expansion port which isn't used.

I was happy as the Electron seems to work fine when I switched it on first. - Then came the evil surprise! :(
Half an hour or so the computer works fine but then it flickers and behaves exactly as described in this thread.

Now it's down and only shows a yellow screen when being switched on. As I've read that this is a known issue I've removed the ULA and cleaned the contacts. I also have removed the ROM to ensure that contacts are OK.

This hasn't changed anything. The screen still is yellow and the system doesn't boot up. => No LED, No Beep, no nothing.

Any suggestions? - Do I have grilled the ULA?

THNX for info.

MfG
der Eratosthenes

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