Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Pavilion dv4 screen dark, but external display shows windows is loading

Posted on 2014-04-02
7
Medium Priority
?
848 Views
Last Modified: 2014-04-07
I figure this is a hardware issue, possibly a bad connection, or bad video card. But before I assume that I wanted to ask you guyz advice.

On a Pavilion dv4-2160us laptop, all the lights come on, the windows welcome sound plays, and I can see the desktop if I connect external monitor. (Or I could - it worked once, but I'm having trouble maknig it happen again.) But the laptop display shows nothing. During the boot process the screen goes from all black to dimly lit black a few times. When I use the dimming/brightening keys, the black screen slightly lightens and darkens. If I use the F4 key to cycle through the external display / laptop display combo settings, it never comes on, even when set to "both" or "no external".  I tried opening the upper half to all angles.  I removed the battery, unplugged and held the power button for 30 secs.
0
Comment
Question by:dgrrr
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
7 Comments
 
LVL 35

Assisted Solution

by:Dan Craciun
Dan Craciun earned 400 total points
ID: 39974070
Get a flashlight and point at the screen. Can you see your desktop/icons?
If yes, your screen is damaged, but the repair is not expensive.

If you can use an external display then the video card is probably fine.

HTH,
Dan
0
 
LVL 93

Expert Comment

by:nobus
ID: 39974747
if you can't see anything on external, and primary screen - probably you have a bad video card.
in most laptops, this means a new motherboard
0
 
LVL 36

Accepted Solution

by:
Kimputer earned 400 total points
ID: 39974922
Press a flashlight ON the screen (of course, don't damage it, just look off the side near the light to check for details, move flashlight around the screen, see if you can recognize icons and such, also try to find your cursor, see if it moves along the defective screen).
If you can see some vague display (your desktop, if you let the computer finish booting), the backlight  or inverter is blown, and the repair costs are moderate.
If you can see totally nothing, the whole panel has to be replaced (and backlight might also still be blown), the cost will be somewhat higher.
Costs for backlight or inverter should be somewhere around 50 euros, the whole panel could range from 100 to 200 euros.
0
Plug and play, no additional software required!

The ATEN UE3310 USB3.1 Gen1 Extender Cable allows users to extend the distance between the computer and USB devices up to 10 m (33 ft). The UE3310 is a high-quality, cost-effective solution for professional environments such as hospitals, factories and business facilities.

 

Author Closing Comment

by:dgrrr
ID: 39982472
With the flashlight I can't see any icons (or safe-mode type text) so I'm going to tell the owner probably the whole panel needs replacing.

thx!
0
 
LVL 93

Expert Comment

by:nobus
ID: 39982510
i know this is not what you wanted to hear "if you can't see anything on external, and primary screen - probably you have a bad video card.
in most laptops, this means a new motherboard "

but if this is the case -  replacing the screen won't help !

***why not wait for the outcome before closing this ??
0
 
LVL 36

Expert Comment

by:Kimputer
ID: 39983841
It was already stated in the original question there is a working external monitor, hence the bad video card and motherboard replacement wasn't ever an issue.
0
 
LVL 93

Expert Comment

by:nobus
ID: 39985172
Kimputer - that sentence is followed by "(Or I could - it worked once, but I'm having trouble maknig it happen again.)"
0

Featured Post

Take our survey for a chance to win!

As a valued customer of Targus, we’d like to ask you a few questions about us. As thanks, you will be automatically entered for a chance to win a $500 VISA gift card. To enter, just complete the survey by September 15, 2017.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In this modest contribution, I want to share with the IT community (especially system administrators, IT Support Engineers and IT Help Desks) about Windows crashes/hangs and how to deal with these particular problems.
By default Outlook 2016 displays only one time zone in the Calendar. The following article explains how to display two time zones in one calendar view.
As developers, we are not limited to the functions provided by the VBA language. In addition, we can call the functions that are part of the Windows operating system. These functions are part of the Windows API (Application Programming Interface). U…
This video Micro Tutorial explains how to clone a hard drive using a commercial software product for Windows systems called Casper from Future Systems Solutions (FSS). Cloning makes an exact, complete copy of one hard disk drive (HDD) onto another d…

670 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question