Question about Computers & Internet

1 Answer

Hello! My system model is hp pavalion dv4 series no is 1216tu.I am unable to see anything on the can u suggest me what is the problem for this??

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Computers & ... Master
  • 5,159 Answers

There are several possibilities. Can you connect an external monitor to the laptop to check the video signal. Then press Control-Alt-F1 to send the display to the monitor. Check your documentation for the hot-key to enable an external monitor if the sequence doesn't work. (Otherwise, you need to get into Windows to change the display settings.)

If the external monitor works:

1) The screen is dim (backlight or the backlight inverter failed). To check this look very closely at the screen and see if there is any image. Sometimes holding a flashlight near the screen will help you see this. If you see the image, then the backlight is the probable failure. If there is no image, the inverter or the video cable are suspects. The inverter can be replaced fairly easily and can be tested with either a multimeter (that reads high Hz values) or an oscilloscope after removing the bezel from around the laptop. Hold the probes a fraction of an inch apart about an inch above the inverter. With a multimeter, you should see a value of either 1 (above the range that can be interpreted), a value (say 50,000 Hz). If it isn't working, you will see a 0. The backlights can also be replaced but is harder.

2) The video cable from the motherboard to the screen has been damaged by opening and closing the laptop. This can be replaced.

If an external monitor doesn't work, then I suspect your on-board video has failed or has a problem (assuming the laptop appears to have booted at all). First reset the computer. Unplug all of your peripherals. Then remove the battery (and power adapter) from the laptop. Then press and hold the power button for at least 15 seconds. Reconnect the power adapter(not the battery) and see if any of the keyboard and activity lights come on.

You can try getting into the BIOS to check. Turn off the computer then turn it back on while pressing and release F10. If you can see the BIOS information on the laptop's screen, it's a Windows issue. Try pressing F8 in a similar fashion. In the Safe Mode, try uninstalling the video drivers or reverting to last known good configuration. Alternatively, insert your recovery disc or Windows Install disc and press F9 to select boot location. Try to do a system recovery. (Alternatively, press F11 and do a system recovery to the original condition of the laptop.)

I hope this helps.

Cindy Wells

Posted on Apr 04, 2011


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get to try the service completely Free afterwhich it costs $6 per call and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

What's HP Pavillion dv4-1313 dx monitor does not come on


Apr 21, 2012 | HP Pavilion dv4-1140go Laptop

1 Answer

I have win 7 on hp dv4, my dvd drive can't read some dvds

Download and install a CODEC package for your PC this is the problem you don't have certain CODECs installed these make anything invisible to the system without them.

Win 7 CODEC HDTV pack with all the latest CODECs go to download from there problem should be solved.

May 12, 2011 | HP 419320-001 - HP Pavilion dv4000 Series...

1 Answer

I have Hp pavilion Dv-4 2126 tx notebook with build in Finger print reader.My fingerprint scan along with different website/s login info is duly saved with Digital Persona but i am not able to log in to...

my lap hp pavalion dv4 2126tx........
i am working in win 7 os .when the lap is connected with ac charge plugin its working normally....if the ac plug in disconnected lap becoming death slow

Aug 07, 2010 | DigitalPersona DIGITAL PERSONA USB...

2 Answers

Just replaced power supply unit from a 250 watt to a 480 watt and now computer comes on but will go into power saving mode instead of booting up and keyboard doesn't stay lit like it used to.The system is...

Which power supply went bad? The 250watt or the 480watt? If a power-supply goes bad (dies), it generally takes some (if not all) hardware with it.

Jan 05, 2010 | HP Computers & Internet

1 Answer

Hp pavilion dv4-1220us overheating then shutsdown

Sounds like you need to take it in for repairs, clean outs and/or replacements.

This product is known for it's heating issue and power consumption. Maybe the fan is starting to wear out and it's affecting the rest of the system. I would suggest checking the warranty on the system, if it is no longer valid, then I would look for a local tech in the newspaper.

Dec 15, 2009 | HP NB199UA Pavilion Notebook

2 Answers

HP DV4 displays only a blue screen running vista

Shutdown the computer,disconnect external peripherials.
Turn on the computer and hit F8 key as soon as you restart the computer
You will get the windows advance options menu.
Select the Safe mode option and hit enter.
If the computer boots in safe mode, do a system restore to previous date.
If computer restore then issue is resolved.
If still unable to boot in safe mode.
Ran a harddrive diagnostic.If harddrive test passes. If harddrive test fails replace harddrive.
Boot the system using the windows xp or vista operating system disk. Try to repair the OS then reboot the system and check.
If still unable to boot possible issue with corrupt operating system.
Reinstall Operating system. / Recover System . Good Luck.

Aug 27, 2009 | HP Pavilion dv4-1140go Laptop

1 Answer

HP dv9208 pavilion laptop screensaver & briefcase not working

Hello there
Call HP or go to chat support and threaten them that if your Notebook wont be repaired you will go to consumer court....

HP's 24X7 chat support...

Feb 18, 2009 | HP Computers & Internet

Not finding what you are looking for?
Computers & Internet Logo

Related Topics:

52 people viewed this question

Ask a Question

Usually answered in minutes!

Top Computers & Internet Experts

Doctor PC
Doctor PC

Level 3 Expert

7733 Answers


Level 3 Expert

102366 Answers

David Payne
David Payne

Level 3 Expert

14161 Answers

Are you a Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides