Comments on: Troubleshooting laptop with backlight failure

By: cj2600

cj2600 — Tue, 27 Dec 2011 18:59:52 +0000

@ Al,

HP Paviilion with dark screen. Works fine on external monitor.
Pressing firmly on keyboard will light the screen perfectly, but it goes off when pressure is released.

Could be bad connection between the video cable and motherboard. When you are applying pressure on the keyboard, you actually applying pressure on the video cable connector. This is my guess. I would try reconnecting the video cable first.

By: Al

Al — Tue, 27 Dec 2011 14:50:04 +0000

Good morning,
HP Paviilion with dark screen. Works fine on external monitor.
Pressing firmly on keyboard will light the screen perfectly, but it goes off when pressure is released.
Thank you.

By: cj2600

cj2600 — Fri, 09 Dec 2011 02:43:43 +0000

@ Marcus,
I assume that desktop monitors are similar to laptop monitors but this is just a guess. I don’t fix PC monitors and never done it before.

By: Marcus

Marcus — Thu, 08 Dec 2011 15:27:13 +0000

Hi,I have a Dell St2010 Monitor for desktop,I had almost the same problem in Ur articular.Few weeks ago my monitor started flickering and 2 days ago while I was using,I heard buzzing sound coming out from my monitor,so I turn it off and turn it back on and my screen went dimmer,darker than it used to be(its like 90% of the power cut off)But in Ur article you stated that u experience reddish tone but I didn’t have that problem.I m just curious know is it my back light failure? I cant afford to buy a new monitor it cost a bomb ,thanks for sharing ur experience and great article,and sorry for my bad english,I hope you can reply as soon as possible thank you

By: cj2600

cj2600 — Wed, 02 Nov 2011 16:51:22 +0000

@ Rox,

Toshiba Equium, screen replaced as it got damaged. After I replaced it and switched laptop on I only have about 5/6ths of my display. Settings etc for the widescreen are correct but I have a black section on the right. If I open a webpage I can actually hide part of it behind the black section! My taskbar is also stretched at the bottom.

First, of all make sure the video cable is plugged correctly. Try reseating connection on the back of the screen.
If it doesn’t work, it’s possible you got a defective screen.

By: Rox

Rox — Wed, 02 Nov 2011 15:12:43 +0000

Can you advise me please? Toshiba Equium, screen replaced as it got damaged. After I replaced it and switched laptop on I only have about 5/6ths of my display. Settings etc for the widescreen are correct but I have a black section on the right. If I open a webpage I can actually hide part of it behind the black section! My taskbar is also stretched at the bottom. I basically have a square display on a widescreen panel and can’t change it. Any ideas?

By: Shree

Shree — Thu, 06 Oct 2011 17:59:52 +0000

I bought a hp dv 2000 4years back.it was working fine till a month ago it started having similar problems. The screen goes blank suddenly and emits a continuous buzzing sound. This doesn’t respond to anything not even the power button. I need to shut the AC power and pull out the battery to make it stop. When i restart again it works fine for sometime and then it happens all over again. Any ideas on why this is happening nd what i do about it. Plzzz….help.

By: Kathy Cobb

Kathy Cobb — Mon, 26 Sep 2011 19:53:34 +0000

Nahid?

Do you know where the closed lid switch is for the Acer Aspire 6930?

My new lcd screen is black but when connected to an external monitor, it is fine. When I shine a flashlight, the images show.

So, I am not sure it’s the new screen, the backlight, or the inverter.

Any help would be appreciated.

By: cj2600

cj2600 — Tue, 20 Sep 2011 21:18:53 +0000

@ Nihad,

I have a Dell D610 and I do not have an image on the screen. I can see it with a flashlight, and it works with an external monitor. I have replaced the inverter and the backlight. I tested the backlight before I put it all back together and it worked fine. Once I put it back together, I wasn’t able to see the screen unless I used a flashlight. Any idea what the issue may be?

It’s hard to tell.
Your laptop should have a lid close switch button somewhere close to the left hinge. Try tapping on the button while the laptop is turned on. It’s possible the lid close got stuck inside the case.
Usually when you have a very dim image on the screen, it’s one of the following:
1. bad inverter.
2. bad backlight lamp.
3. stuck lid close switch.
4. bad connectin between video cable and motherboard.
5. bad video cable.
6. motherboard problem.

By: cj2600

cj2600 — Tue, 20 Sep 2011 20:08:34 +0000

@ Manan Shah,

I have Dell inspirion 1520 model and i am getting 2 lines in LCD
Here is the Screen Shot of my laptop http://postimage.org/image/2wvgyb23o/

I assume there is no problem with image on the external monitor, right?
Move the laptop display. Does it make those lines to go away or make image even worse?

I think this could be one of the following:
1. Bad connection between the video cable and motherboard.
2. Faulty video cable.
3. Bad LCD screen (more likely).