Old socket failure. Something to watch for.

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Old socket failure. Something to watch for.

Postby tezza on Thu Oct 13, 2011 12:16 pm

Last night I diagnosed a System 80 that didn't work more times than it did. The problem? A faulty pin 4 hole in ROM socket 2.

This is the third machine of mine where a faulty socket has caused an issue. I've had similar problems with my Kaypro II and Commodore PET.

A common technique when faced with a newly acquired machine that doesn't go is to reseat all socketed chips. This is a good idea, but must be done really really carefully otherwise it can damage old sockets. Far from curing a problem it can actually be made worse. This probably happened on all three machines mentioned above, as they certainly went through a chip reseat.

Anyway, something to be aware of.
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Re: Old socket failure. Something to watch for.

Postby Gibsaw on Fri Oct 14, 2011 1:03 pm

tezza wrote:Far from curing a problem it can actually be made worse. This probably happened on all three machines mentioned above, as they certainly went through a chip reseat.

Anyway, something to be aware of.


Ah just what we need... more double edged swords in diagnostic technique.
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Re: Old socket failure. Something to watch for.

Postby lizardb0y on Sun Oct 16, 2011 8:02 am

Gibsaw wrote:
tezza wrote:Far from curing a problem it can actually be made worse. This probably happened on all three machines mentioned above, as they certainly went through a chip reseat.

Anyway, something to be aware of.


Ah just what we need... more double edged swords in diagnostic technique.

Yeah. And it'll only get harder the older they get. I need to make my millions soon so I can retire young and restore them all!
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