SOURCE: compaq presario laptop blinking power button
REMOVED BATTERY AND CHECK ONLY IN AC MODE
IF ITS START PRESS F8 AFTER BOOTING AND OPEN IN SAFE MODE
SOURCE: Compaq Presario CQ45 screen remains blank... help
Open the Notebook from the back side and locate the RAM. Now remove the RAM and place it again and check, you can even try inserting the RAM in different slot if any used slot is available.
Check out.
SOURCE: Display problem with Compaq Presario
Did you by chance spill liquid onto the laptops keyboard?
SOURCE: I have Compaq Presario CQ40
Please check your laptop Memory. For details check my tips.
http://www.fixya.com/support/r8722201-laptop_led_blink_startup
SOURCE: I have Compaq Presario CQ40
Hi,
Check the following link with Beep and LED blink codes.
This will help identify your problem.
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01732674&tmp_task=solveCategory&lc=en&dlc=en&cc=us&site=null&product=4296271&key=null#N215
Reagrds,
Icom1
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