[Webinar] Learn how to a build a cloud-first strategyRegister Now

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 1487
  • Last Modified:

Samsung R540 Screen LED Backlight Not Working

My nephew dropped his laptop and destroyed the original screen.  I ordered a new one and it wouldn't work after installing it.  I ordered an OEM Screen thinking that was the issue, but the new screen backlight doesn't work either.  I've checked the video cable (with a new one) as well, but still can't get anything.  I can see the display if I shine my flashlight on the screen so I know it's just the backlight.  Is there a simple way to troubleshoot what could be causing this?
0
Brad Sims, CCNA
Asked:
Brad Sims, CCNA
  • 3
  • 2
2 Solutions
 
AusRobCommented:
I don't know that particular model, but unless it's an LED backlit screen, there is a board under the LCD panel that converts the DC volts from the battery to AC High Voltage for the Flouro back light tube (over 1000 volts). I presume the new screen you ordered came with the bulb built in? If so, it sounds like the inverter has failed.
0
 
nobusCommented:
that is called the inverter, look here for testing it :  http://www.youtube.com/watch?v=2Yi6GNFcP3w
usually you can test the inverter with any backlight
0
 
Brad Sims, CCNANetwork AdministratorAuthor Commented:
It is an LED.  I have an LCD inverter tester.
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
nobusCommented:
ah i see - then there is no inverter
that leaves only the video card = mobo...
maybe time for a new laptop?   unless you still have warranty left
0
 
AusRobCommented:
you can still test the LED backlight, but it might take a little more research. Here is a link to a pretty good explanation of how;

http://www.technibble.com/forums/showthread.php?t=38262

 If you can find the wires leading from the video card that provide power to the backlight, you can use a multimeter to check the volts. Also, if you have a standard desktop PC, you can rig up a test cable to check the actual backlight LEDs in each panel, (I presume you still have the old one?). You only need fairly basic knowledge of electronics to do this.
0
 
nobusCommented:
this is a ready made one :  http://www.lcdparts.net/IT02.aspx
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

  • 3
  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now