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QL Startup Problems

Posted: Sat May 02, 2015 10:04 am
by RWAP
A customer in Germany has just posted a picture of his QL -

http://www.mediafire.com/view/t3qe1al898ilqh7/QL.JPG#

Not seen one of those patterns before - I guess it is probably RAM, but any other ideas?

Re: QL Startup Problems

Posted: Sat May 02, 2015 10:11 am
by 1024MAK
That's a very UK looking mains socket with UK 13A mains plugs.

As to the fault, a RAM fault is likely, but it could also be a faulty address multiplexer chip (type 74LS257).

Does the user have access to a Gold or Super Gold card to test with?

Mark

Re: QL Startup Problems

Posted: Sat May 02, 2015 11:00 am
by RWAP
No unfortunately, he just has a bare QL - I am going to lend him my Minerva to check the RAM :D