Samsung Series 7 NP700Z7C LCD Screen Not Backlit (Do I need Screen Replacement?)

[Attackofthebitcrusher]

The LCD on my laptop went dark a few days ago and upon investigation I determined that there was still an image being projected on the screen, but there was absolutely no backlighting. There appears to be nothing else wrong with the laptop, as it works perfectly fine when connected to an external monitor. I once managed to get the backlighting to come back by messing with display drivers, but it went dark again a little later and I have have not been able to make it return since.

Since nothing on the software side appears to be working, I'm starting to think it may be mechanical. From what I can gather, my model uses an LED backlight instead of a CCFL bulb backlight. That means that if the LED is actually burnt out or inoperable, a full screen replacement may be my only option.

So my question is this, what are some things I can do to try to isolate the problem and determine if it actually is the LED itself, or some other kind of problem like a software bug or wiring issue? What are some things I should look for if I open the laptop up and start going through it's guts?

Also if it is any help, I had not experienced any strange behavior with the monitor up until the incident. It was on one moment and then just turned off the next.

 

[rgd1101]

MERGED QUESTION
Question from Attackofthebitcrusher : "Laptop LCD Display Back Light acting strange"

A few days ago I left my laptop open and the screen went dark, as was to be expected. However when I went to get it back on, it wouldn't respond. At first I thought that the actual LCD had crapped out on me, as everything worked fin when connected to an external monitor via HDMI. However, Upon shining a light at my screen, I noticed that there was till an image, it was just SUPER dark, indicating the the backlighting was out. However to complicate a diagnosis, I managed to get he screen to come back to life by rolling back the display driver, so the actual backlight is not actually broken. But then it went dark again a little later and i haven't been able to bring it back, even with the driver roll back.

I also notices that the both times that this happened, the laptop was running off the internal battery, so I am wondering if there is some kind of bug with my laptops screen dimming feature. I disabled all power related screen dimming, but cannot test it as I have not been able to get it lit up again. Any guidance as to where to go next would be greatly appreciated.

Computer: Samsung Series 7 Chronos notebook, i7, Intel HD4000 + Nvidia gtx 650

 

[coldheat]

Hi, unfortunately I also don't have a solution but rather the same problem. As there is very little information on broken LCD backlights for Samsung Series 7/9, I was wondering if you found a solution or at least if replacing the screen solved it. Seems like for other laptops the error may as well be on the main board. Thanks.