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Old 14th Apr 2021, 8:19 am   #1621
SiriusHardware
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Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,482
Default Re: Non-working Commodore PET 3016

I did find some potential replacement contact dimples, but it depends whether the original ones can be removed and are the same size. (#1603).

To answer Owen's question, yes, the 74LS145 was replaced and did have the hoped for effect, but there is also a secondary problem where some of the carbon contacts on the plungers are dead as well. Colin has tested every key position by using a known good key plunger to activate each one.
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