In a message dated 11/30/02 12:37:32 AM, [EMAIL PROTECTED] 
writes:

<<
Most PSU's of the 800/840 type I see are usually OK if they start the Mac,
with the exception of when their internal main reservoir capacitors lose
value. They then start the Mac, and as drives spin up can't supply the
current and switch off.
>>

Fortunately, there are only one dual cap or two single caps, and these are in 
the primary (converter) section.

Sadly, they're usually 105 degree C rated, and most replacements are only 85 
degree C rated.

The caps in the secondary (inverter) side are special low ESR type, and these 
seldom fail.


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