Dead Laptop comes back to "Life" Mystery

[Guest Brad]

Hi,

 

I have a Compaq Presario 1200XL110 laptop (bought 2nd hand) with

bad display (display "wires" disconnected). I used an external

Monitor. I

kept the laptop plugged into AC all the time and the battery installed.

I

had no problems the first few days. Note: the laptop was on from

7:30AM

until around 5PM every day. Then one morning, I tried to turn it on,

but

absolutely nothing happened. The only indicator that was lit, which

is always lit, is the plugged into AC indicator. Note: I am a TV,

etc. (not

computer) serviceman. I won't go into details of the tests I

performed, which

included testing the power switch.

..

I removed a dead (!!) RTC/CMOS battery. Note: When the laptop

"worked",

there was no sign (loss of time/date) that the RTC/CMOS battery was

going bad.

 

I put this laptop in a box (main battery removed). About 5 days

later, I

hooked it up to AC, but left the main battery out (RTC/CMOS battery

removed).

When I tried to turn it on, absolutely nothing happened so I put it

back in

the box (main battery removed).

 

Over a month later, I hooked up the laptop (main battery removed & no

RTC

battery). When I pressed the power button, it booted up!!!!!!! I

repeated

shut down and power up. It boots up every time, although I see a

warning

message caused by no RTC/CMOS battery. I installed a new RTC/CMOS

battery. I now use it on AC without the main battery installed. When I

shut

it down for the day, I remove AC power via the switch on the power

strip.

 

Can someone explain this MYSTERY???

 

Thanks in advance, Brad

 

Before you type your password, credit card number, etc.,

be sure there is no active keystroke logger (spyware) in your PC.

 

 

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