Re: Great Mystery Compaq Presario 1200XL Laptop

  Hi Ken,

     The laptop is "totally dead".  Absolutely nothing happens, not even the
faintest "tick" when you press the power button.  The first time this
happened,  I opened the laptop and bridged the "Power" button switch
with another, thinking it might be the power switch.

                    Brad

On Thu, 05 Mar 2009 06:50:42 -0600, in sci.electronics.repair you wrote:

 bpetria@verizon.net (Brad) wrote in


Sounds like a (in order of decreasing probability
'bad solder connection'
bad component (capacitor, IC, diode, transistor, inductor, resistor) that
may have an internal connection that opens up under thermal stress and the
stress only slowly relaxes, allowing the connection to make again.

Suggestion: chill various areas while cycling the power.

Alternate suggestion: chill the whole computer (put it in a zip lock back
and put it in your refrigerator over-night, take it out the next morning
and allow it to warm to room temperature before opening the bag [to prevent
water condensation]). This may allow you to 'reset' the computer more
rapidly.





--
bz        73 de N5BZ k

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.

bz+ser@ch100-5.chem.lsu.edu   remove ch100-5 to avoid spam trap

 
pretty method, i will consider it maybe...
but the 'nine proof' for bad connection can be when it powers up try to hit a
bit it around,
try to stress it to find bad connect. or bad soldered BGA chips..
let us know.. after that open the freezer and let it make frendship with
chickens or fishes...