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bad battery?


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#41 johnthehillbilly

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Posted 13 December 2012 - 06:57 AM

Just for kicks, Re flash the Bios and manually download it yourself.. Also post the date of the Release..

Also, check link

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Decided AGAINST using hammer....LOL
Uninstalled and re-installed OS
Reflashed BIOS from manual dl.... version 310 date 2012.10.30

Cmos battery pulled

Laptop powers on only if AC is supplied

Battery pin tests (black lead chassis grounded)

Pin 1 0 volts
Pin 2 0 volts
Pin 3 0 volts
Pin 4 4.09 volts
Pin 5 0 volts
Pin 6 0 volts
Pin 7 0 volts
Pin 8 15.06 volts
Pin 9 15.06 volts

Black lead battery grounded (pin 1)

All pin voltages the same as above (expected)
Rules out bad ground...

Repaired broken insulation on wifi lead(found earlier)

Tried identical battery (thanx the the geek squad in warrenton, MO) ... still no battery recognized

Board traces in charging circuit appear ok...

Visual inspection of capacitors appears ok

My conclusion..... (without de soldering components)

Bad diode on charging circuit..... which would explain the slight fluctuations in voltages from yesterday to today.......

More than likely caused by direct short of earlier mentioned wire on WIFI card.....

Repair options..... replace all diodes (in circuit) 6 at 75 cents each.... or replace MOBO at about $150 ..... i think its a no brainer.... LOL

Thank you everyone for all your help on this issue.... it is greatly appreciated!!!
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#42 satman80

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Posted 13 December 2012 - 07:34 AM

Topic locked per request johnthehillbilly. Solved.

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