@Heather116637
We have no way to access your PC from here, so there is no way for us to examine it to tell you either what is wrong with it or how to fix it.
As to the Service Center, we are not permitted to intervene with anything they say or do, so if they say it is corroded, there is nothing we here can do about that.
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I am a volunteer and I do not work for, nor represent, HP