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Old 18th August, 2004, 02:27 AM
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Gizmo Gizmo is offline
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Yes, absolutely, a PSU can cause the kind of thing you are seeing. Most PSUs have at least two independent regulator circuits in them (one for +5vsb and one for +5), as well as independent output ciruitry for each supply rail (+5, +3.3 +12, -5, -12). It is entirely possible that one of the output circuits has fried in some way. This would be fairly easy to diagnose if it is a 'hard' failure (like no voltage). Much more likely is that one of the output stages has a bad filter cap that just isn't able to handle the load any more. The only way to see this is to use a 'scope and look at the ripple on the output.
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