Question about Dell XPS 420 PC Desktop
Speaking from 35 years of experience, it is seldom ever the "Buttons". (But it is worth a check, they should be a push button normally Open, closing when pressed, use a meter set to OHMS to check) Usually if the PSU is OK, then the problem MUST be either the Mother Board, the RAM, any "Add On" Cards, the HDD, or CD/DVD. etc.
To prove what is actually wrong, one must, simply swap out Componentry, and see if the removal makes any difference. If it does, then the most recently removed/swapped component, is your problem. That component needs to be replaced.
If swapping out, removing etc, does NOT affect anything then most likely the repair guy is correct, and indeed the MB is faulty, MB's frequently go faulty, and the PSU still be OK.
Below is a link for your service and repair manual, download the relevant manual for your make model.
Posted on Oct 14, 2010
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Posted on Jan 02, 2017
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