Capacitors were mentioned in passing by soemone as a possible source of
trouble.. You really don't want any aluminium "wet" electrolytics on that
board at those temperatures. Even 105C parts can be expected to have
lifetimes of under a year at 85C operating (depending on rated life at 105C.
Typically lifetime halves for each 10C rise. So even a 10C rise from
previously (and it sounds like yo have more than that in reality if
processors are failing now but note before) will halve your capacitor life.
I reality you might expect a reduction x 4 times with the new all improved
design..

Note very well that if you do have electros there you NEVER want it hot with
the board powered down. Electrolytics die far quicker when heated with power
off. If the board spent a fair part of its life at 85C with no power you
could expect capacitor failures in months.

        Russell McMahon

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