Having problems with your Compaq PC Laptops ?

C500 Laptop won't come on power button just flashes

\015 Have compaq c503wm laptop push power button front light shows charging, after pushing power button about 5-15 seconds power button starts blinking and power light on front blinks. nothing starts to boot. (replaced Motherboard, CPU, Power Button, \015\012Mainboard AC power Cable new cables with power button, AC adapter also. Did exact same thing with old mainboard and other parts Won't boot when you push power either with battery in or out power button just flashes continously hard drive light flickers 2-3 times then goes out and just flashing power light on button and front panel left . Battery shows charging when battery is installed replaced cmos battery also.\015

Answers :

Have you tried attaching an external monitor when the LCD screen is disconnected from the motherboard? this connector is located under the keyboard strip – a piece of plastic just above the keyboard. \015\012
\015\012If it works, this way, then the video cable isn’t seated properly in the connector on the back of the screen.\015\012Plugging the video cable back in should fix the problem.\015\012
\015\012I don’t know how comfortable you are with taking apart laptops but I think that this information could be useful for you.\015\012
\015\012Source: http://www.asklaptopfreak.com/laptop-notebook-help/2006/08/08/laptop-powers-on-and-shuts-off-immediately/
Repair Help & Product Troubleshooting for Compaq PC Laptops

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