Re: [OT] Good quality hair dryer needed for Squeeze
* John Hasler <jhasler@newsguy.com> [121210 23:27]:
> You may find that pressing down or prying up on that part of the board
> works as well as does the dryer. Inspect the suspicious area of the
> MOBO carefully with a magnifying glass and then fix the crack or bad
> solder joint.
The problem is that motherboards today typically are multi-layer
laminates; if there is a broken trace on an inner layer, the break is
not visible.
But you bring up another possibility: the absorption of moisture may
cause the motherboard to swell; this, together with an mounting screw
which has been torqued a little too much, can cause conduction of
current between traces within the laminate.
When torquing motherboard mounting screws, use a jeweler's screwdriver
(which typically has a barrel about 1/4 to 3/8 inch (5 to 10 mm) in
diameter, and hold the screwdriver with your bare fingers. But do not
leave the screws loose; they need to be set firmly -- else a screw may
vibrate loose and cause an electrical short circuit. If you use a
workman's screwdriver with a large handle or an electric screwdriver,
you likely shall crush the motherboard beyond repair.
RH
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