[Shop-talk] blue screen problems... need the gurus

[John T. Blair]

At 10:01 PM 3/30/2016, Brian Kemp wrote:

 >John - You may have a dust problem.  Remove the power cord and open the
 >computer.  Take a shop vac that blows or some compressed air and 
clean things
 >out.  It is best to do this outside.

John,

If you blow down the inside of the computer with compressed air, put 
a finger on
the fan on the CPU.  You don't want it to turn.  The compressed air can spin up
the fan a lot faster than it is supposed to run.  So a DC motor being turned
externally becomes a generator, and spinning faster then design speed causes it
to output a higher voltage than it runs on.  This overvoltage is 
being applied back
to the mother board and can back feed the CPU and cause it to fail.

John


John T. Blair  WA4OHZ     email:  jblair1948 at cox.net
Va. Beach, Va                  Phone:  (757) 495-8229

           48 TR1800    48 #4 Midget    65 Morgan 4/4 Series V (B1106)
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