Re: Non-working Commodore PET 3016
My understanding is that tantalum's are usually fine as long as they have plenty of headroom on the voltage for transients they will experience in use - I.e. 10V tants on a 9V line will likely go bad. I think they are 25V ones so hopefully they have a bit.
I agree with Duncan U11, UG2 and EF1 def needs the green dealing with and the leg on UH2 seems rusted as well and if it should not be connected the the rail below it may be shorting to that.
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