Solved

Laptop Backlight not working on Dell XPS L702X

Posted on 2013-12-15
5
606 Views
Last Modified: 2016-11-23
I knocked my laptop on the floor and now the backlight isn't working.
When I shine a torch on the screen I can see Windows, just there is no backlight to illuminate it.
If I look in the back I can only see one cable going into the LCP panel - on other laptops I have seen two - is there another somewhere I'm not seeing that has come loose?

What are the possible reasons for this problem?
What are the options for fixing it? Do I just need a new LCD Panel?
0
Comment
Question by:purplesoup
  • 2
  • 2
5 Comments
 
LVL 87

Assisted Solution

by:rindi
rindi earned 333 total points
ID: 39719899
The backlight circuit is usually inside the display, and not the PC, so the cable from the PC to the display can be one cable. It probably splits up inside the display, and possibly also the PC part. So open up your case and the display's cover, and check the connections there.
0
 

Author Comment

by:purplesoup
ID: 39720033
Usually I would think the cause is either the inverter, the cable or the screen, but as this is an LCD screen would it not have an inverter, so it would be either the cable or the screen? Is there a way of finding out which it is?
0
 
LVL 87

Accepted Solution

by:
rindi earned 333 total points
ID: 39720061
New laptops don't have an inverter, but they still have some sort of backlight, usually LED backlights. As those don't require high voltage they don't need an inverter. But they still need to be driven. The cable as I mentioned probably splits into at least 2 parts inside the display, one that goes to the panel itself, the other to the backlight part.
0
 
LVL 91

Assisted Solution

by:nobus
nobus earned 167 total points
ID: 39720945
here a good site with info on how to test LCD, inverter, and screen :  http://www.lcdparts.net/howto/default.aspx
0
 

Author Closing Comment

by:purplesoup
ID: 39726343
Thanks for all your help
0

Featured Post

Save on storage to protect fatherhood memories

You're the dad who has everything. This Father's Day, make sure your family memories are protected. My Passport Ultra has automatic backup and password protection to keep your cherished photos and videos safe. With up to 3TB, you have plenty of room to hold the adventures ahead.

Join & Write a Comment

Suggested Solutions

I am not new to IT, I have been working in the field since 1985.  But recently I came up against something that stumped even me (it doesn't happen as often as I would like).  I was running a screencasting session from the laptop to my TV via ChromeC…
For some time some of our users experienced package loss on a couple of our Lenovo Thinkpad S531 machines running Windows 8 or Windows 8.1 64-bit OS. I was not able to find many answers online, but did after some investigation I began to suspect Blu…
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.
This tutorial demonstrates a quick way of adding group price to multiple Magento products.

747 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

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now