Question about HP Pavilion dv4000 Notebook

1 Answer

Monitor goes blank if run from battery


My monitor goes blank when I disconnect it from the mains. The laptop keeps running as one can hear the fun and there's. It's like when pc goes to "stand by" but it doesn't respond to anything.

I was told to uninstall the display controler and restart. This works, but only temporarelly. If I turn off the laptop and start again, the monitor won't work.

Any idea what can it be??


Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has answered 1,000 questions.

  • Master
  • 1,601 Answers
Re: monitor goes blank if run from battery

From the mains?

You mean power?

If you have to uninstall the display controller , that means that your video drivers are bad, and you are running the native video drivers.
Get new updated drivers and keep us posted.

Posted on Nov 19, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

I am trying to diagnose a problem with my son's laptop screen going blank. I shall try to describe the symptoms. 1. When plugged into an external monitor, everything works fine. 2.The laptop screen...

Have you check the cable that goes from the screen at the motherboard? Usually this cable is not visible; it is hidden it one of the joints between screen and main body of the notebook.This cable is the most common problem in the cases that the notebook keeps on working although the screen is black. You can check it by opening slowly - slowly the screen all the way up and closing again slowly. If there is a cut at the cable your screen will get black at a specific slope.

In case of a problem or clarification, don't hesitate to post me a reply before rejecting my answer.
If you are satisfied, accept my solution.

Thanks and regards
direct fixya link:

Oct 31, 2010 | Dell Inspiron 6400 Notebook

1 Answer

Compter on and running but no LCD image

Have you connected to an external monitor, just for fun? Try that, don't run off the battery, in fact, take the battery out. Use only the ac adapter for power. Now boot pressing f1 repeatedly until you get into bios. Just let it remain in the bios screen for a few minutes, long enough to prove you don't have a hardware problem such a s the inverter going out, etc.
Then allow it to continue to boot to windows. If it appears on the external monitor (may need to hit Fn+F5 or F&, to utilize both monitors), but not the system monitor, it's possible you've got a bad piece of hardware such as an inverter going out, or even the backlight failing.
If there's no image on either monitors, but you hear the usual sounds of windows booting up completely, it gets tricky.
First think is to update to most recent bios.
Floow the directions from the Lenovo site for the T20. Use the floppy image; it's just easier.
Good luck.
Let us know how it's going.

Nov 25, 2007 | IBM ThinkPad T20 2647 Notebook

2 Answers

I have a dell e1505 laptop you turn it on it flickers to dell for about a 1/2 second then goes virtually black but if you look real close the screen is can still hear it, i hook it to a exteral...

hi there !

-if you switch the computer on and it boots up and you hear the windows sound, this could be a possible video problem or motherboard problem
-run the diags on the LCD, while the computer is off, press and hold "D" then press power button at the same time, if you see the colors red blue green without any problems then it is a motherboard or video card problem
-another method to run the test is while the computer is off; preess and hold Fn then press power button, let the test run; when you see the question were colour bars displayed, press N, if you see the colors red blue and green without any problem then it is a motherboard problem or video card; otherwise it is an LCD problem
-to toggle display on the external monitor press Fn then F8

cheers !

Oct 20, 2009 | Dell Inspiron E1505 Notebook

1 Answer

Last week I ended up restarting my computer and for some reason the monitors starting to go black. It's an alienware and it pretty much these are the symptoms. Keep in mind that my laptop is always plugged...

try to connect laptop to an ext monitor if you will still be getting this problem. if yes uninstall and resintall the video driver. if not then LCD might causes the problem. try reseating the LCD cable if possible.

Oct 14, 2009 | PC Laptops

2 Answers

My laptop monitor keep shutting down....

Check the display power settings in Control Panel.

Oct 04, 2009 | HP Pavilion dv4000 Notebook

1 Answer

Laptop will not start

It's possible the video card is burnt out from over heating.If it is you need a new motherboard.

Jun 01, 2009 | HP Compaq Presario F730US Notebook

2 Answers

Blank screen upon startup

Try taking out the hard disk, plug in power and see if you have a display on your screen or external monitor. if same thing happen, try taking out the memory card. If you hear a beep sound it's a faulty mem. card, if no beep sound appears I suspected it's a motherboard faulty.

May 31, 2009 | Lenovo ThinkPad T61 Notebook

1 Answer

Laptop battery dead

nope, battery can die even if always on AC power with battery installed. Time to replace the battery. sorry for the bad news.

May 31, 2009 | Fujitsu Siemens AMILO D-7830 Notebook

1 Answer

Screen goes blank when on battery power

Two possibilities: The display is a power hog. It's possible that the battery is failing, and has enough power to run the PC, but not the PC AND display at the same time. You would need to replace the battery, in this case. Or, in Control Panel, in Performance and Maintenance, in Power Options, there should be settings somewhere for the display when on battery or AC power. Make sure that the one for Battery doesn';t turn the display off after 0 minutes.

Mar 03, 2009 | Dell Inspiron 1521 Laptop

Not finding what you are looking for?
HP Pavilion dv4000 Notebook Logo

Related Topics:

65 people viewed this question

Ask a Question

Usually answered in minutes!

Top HP PC Laptops Experts


Level 3 Expert

5660 Answers

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

Michael Thomas
Michael Thomas

Level 3 Expert

3051 Answers

Are you a HP PC Laptop Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides