Question about HP Compaq nx9420 Notebook

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Laptop HP Compaq nx9420 Screen goes Blank

After starting up my laptop, if I drop the screen down it goes blank and will not come back on unless I restart the computer. The problem started after it was dropped on the floor. Everything apperars to work fine except for the screen going off. I beleive it is a mechanical problem..Any clue???????

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  • Anonymous Apr 28, 2008

    same, dell inspiron 1000



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Looose wires maby on screen under top side clip out that pice on top to see if cables looose dwas it pluged in when u droped it maby power going bad cant get enfh power to screen try that 1st new power cheak fn button make sure not defulte dto crt over onbord lcd thx nick im open for chat

Posted on Jan 07, 2008

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From the Symptom you described, it seems like the thin video cable's connector is loose and is barely connected to the video adapter on the motherboard. You won't be able to tell until you remove the Keyboard and/or the Palmrest to check it. Also, there is a slim possibility that the Laptop has knocked something loose and is going into sleep mode. Normally, a Laptop user can configure it to go into Sleep mode or 'Hibernate'. These settings can be found in the Control Panel under 'Power Settings'.

Posted on Jan 07, 2008


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My compaq presario cq60 laptop screen goes blank intermittantly. I can not get the screen to come back on without forcing a shutdown.

Get some canned air and blow out all the dust you can.
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Take it to a repair shop

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My Hp compaq nx9420 laptop turns on but screen remains black

may be some software or hardware problem try to install your os again or before that you also check the ram of your lap

Sep 18, 2013 | HP Compaq nx9420 Notebook

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Just got cq56-115dx laptop this morning. turned it off after setting it up. Turned it back on and only have blank screen. Power shows lit up.


Remove the AC power (charger) and then take the battery out. Plug in just the AC power supply and turn the laptop on, see if it boots up and shows a display on-screen. If it boots let it boot up and then shut it down as normal. Reinsert the battery and try as normal.
If you still get a blank screen can you then tell me if you get any post (splash) information like the Compaq Presario logo before it goes blank.

Good luck.

Jun 28, 2011 | Compaq Presario CQ56-115DX Laptop

2 Answers

BLANK SCREEN ON MY hp compaq nx9420. my laptop was working fine and then when restarted I got a blank screen. The power LED and cahrging LED both light up but screen remains blank. have changed the video...

Did it display any video at all with boot options or HP logo? Any POST test or beeps after you started the laptop?
Try removing the power ac adapter and battery. then only boot it up with just the AC adapter (no battery).
Good Luck, JAJ

Mar 30, 2010 | HP Compaq nx9420 Notebook

1 Answer

Res sir i have a laptop nx 5000 and probelm is

if screen is blank, that doesn't means that u've to replace ur screen.
Can u see BIOS screen when u start ur laptop ?
if yes then its ur operating system's problem. and if u cant see the BIOS screen, try to contact HP Assistance service.

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Pull the AC cord and the battery out for 20 seconds. Plug it all back in and try again?

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try starting your laptop in safe mode by presssing f8 during the booting process, then check whether its boot or not

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If its a blank screen all the time that never shows anything not even a screen at startup then it sounds like the internal cable from your monitor to the motherboard of the laptop is unplugged or possibly broken. You need to remove the keyboard from the laptop to check this.

I recommend bringing the laptop to a professional if you have no experience with opening laptops.

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Its inverter or mother board problem power which passes to backlight is cutting off because of over heart (over heart of some IC).


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