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8-Bit Software
 The BBC and Master Computer Public Domain Library

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Re: BBC Model B Very Ill
Posted by Ian Wolstenholme on Thursday, November 21, 2002 at 23:48:33
Rich wrote:

The next thing that comes to mind will be the PSU. DONT fiddle with it unless you are totally confident you KNOW what you are doing as you will get one huge belt off of it.

As for the 6522's I cant see any reference to different versions of the chip in the BBC B service manual it just calls them 6522's they may be by different manufacturers.

Rich.

It could be a poor voltage on one of the lines to the board, If you know a local electronics firm they will probably be able to test it for you. If not try to source another and swap it out to see if it cures the problem.

Rich.

I have tried a different power supply from a working Model B but still no luck, I'm afraid! I also tried replacing the keyboard at the same time without success.


Ian
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