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I just replaced my LCD screen and when i turn my laptop on you can only see the screen faintly.

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Unfortunately i dont think its the backlight because when i tried re-installing my old lcd screen to see if it was just the backlight for the new screen...it didnt work either. i am thinking it has something to do with the wires or something... any ideas?
i know the computer itself works well because when i connect my laptop to my tv screen i can see everything clearly.

Posted on Nov 15, 2008

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Sounds like the backlight may not be working

Posted on Nov 15, 2008

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Laptop white screen


Having a laptop screen turn white is one of the most frustrating problems a user can experience since it prevents use of the laptop to find a solution.
A white laptop screen indicates a serious problem with the laptop's hardware, and no easy solution to this issue exists.
Just diagnosing this condition requires advanced computer knowledge.
Identification

With this problem, the laptop itself will power on and load the operating system as per usual, but the screen will become a complete, static white, according to LaptopRepair101.
No particular brand or make of laptop falls prey to this issue more than any other; it can happen to any laptop.

Causes
Since so many different brands and models of laptops exist, specific causes of a white screen vary from laptop to laptop.
The likely cause in most cases of a white screen on a laptop is a connection problem between the LCD screen and the video cable running from the motherboard.
The issue can also reside strictly with the motherboard or the screen might contain a defect.

Considerations Users can diagnose a white screen problem by opening up the laptop display case to determine whether a loose video connection on the back of the LCD screen exists.
Reconnecting the video cable should resolve the white screen; a video cable reconnection that does not fix the white screen narrows the root cause to a problem with the motherboard or the screen.

Motherboard Problems
The only way to determine if the laptop screen turns white due to a motherboard problem is to test out a different, working LCD screen with the laptop.
This requires the user connect the inverter board--the power supply for the LCD backlight and the video cable to the test LCD.
If the test LCD works with the motherboard, then the laptop's screen needs replacing; otherwise, a new motherboard is needed because there is no way to replace an integrated graphics card on a laptop motherboard.

Prevention/Solution
Taking apart a laptop screen may make some users feel uncomfortable, so you can use an external monitor connected to the VGA port common to most laptops if the processor and hard drive still work fine. Using an external monitor requires finding the proper function key command to toggle between the LCD and external monitor.
Warning
Taking apart the LCD screen on a monitor likely voids any manufacturer's warranty.
Consider visually checking the video connection to the laptop screen as a last resort if no other viable options exists.
The service manual that came with your laptop likely offers some tips to disassembling the computer, or conditions that could void the warranty.

http://www.laptoprepair101.com/laptop/2008/04/13/laptop-lcd-screen-turned-white/

Jul 02, 2013 | Dell Inspiron PC Desktops

1 Answer

My laptop screen remains blank when i turn it on but you can tell that it is running....because the lights on the keyboard is on...how do i get my laptop to work??? This happened before and they told me it...


If you still get the loading sound from your operating system, but can't see anything on your screen, try shining a flashlight on it. If you can faintly see images on the screen of your computers background, then it means that the backlight in the LCD screen has burnt. The backlight is usually an array of thin fluorescent bulbs, and not very easy to replace.
If that isn't the case, and you feel that it could be the RAM, simply remove the chip, note the type of RAM AND the frequency (ex DDR400, 333mhz) and purchase a replacement stick of the same type and speed. You could even make it an upgrade, and get a larger stick if you'd like, (ex. 512MB replaced by 1GB stick)

Nov 25, 2010 | PC Desktops

1 Answer

My screen on my laptop just went all black with a very faint image. what is wrong there, how do i fix it, and what made this happen?


A) What is wrong?;
Your Backlight has gone bad, or the Inverter.

B) How do I fix it?
Replace the Backlight bulb, or the Inverter

C) Backlight bulb's, and Inverters, like everything have a 'lifespan'
This one is at the end of it's. (Stating the Backlight or the Inverter

From here all I can give you is Generic information, since I do not have the laptop manufacturer name, and Model Number. This is on the bottom of the laptop.

1) An LCD screen cannot produce enough light by itself. A Backlight bulb, (Or more than one), is used to emit enough light.

2) A laptop cannot produce enough power to power the LCD screen, and is also used for power to the Backlight.

I'll have to discuss the way the Display Assembly is put together, and name parts in order to explain the following of how to repair. Again, generic information.

1a) The plastic top of the laptop is the Top Cover. There are different names used by different manufacturers.

1b) Looking at the LCD screen with the laptop open, there is a plastic frame that goes around the edges of the LCD screen, and is in Front.
This is the Display Bezel

1c) The LCD screen is behind the Display Bezel. The LCD screen is a composite of layers. The outside layer that faces you is a protective screen.
Around these layers composing the LCD screen, is a metal frame.
One side, (Or both sides) of the metal frame is removed to access the Backlight bulb.

1d) The Backlight bulb is a CCFL.
Cold Cathode Fluorescent Lamp.
Very similar to the fluorescent lamps, (Bulbs) uses in residential, and commercial applications, but on a MUCH smaller scale.

Now to show you generic laptop info on replacing the Backlight bulb for them.

A) http://www.insidemylaptop.com/category/backlight/

B) http://www.laptoprepair101.com/laptop/2007/12/09/replace-laptop-backlight-ccfl-lamp/

If I had the laptop manufacturer name, and Model Number, I could try to give you a link to the Service Manual for the laptop. (Free. Usually from the laptop manufacturer)
This way you would have Exact info on how to disassemble your laptop's Display Assembly.
Post in a Comment.

Oct 13, 2010 | PC Desktops

1 Answer

My loptop is an Averatec 7100. How can I test the motherboard? I took it to a computer repair shop and they said is the motherboard, I want to know how can I test it on my own.


This is more of a system diagnosis that an actual motherboard testing procedure, but since all components attach to the motherboard in one way or another it could count as a prcess of elimination......

Laptop is dead. How to troubleshoot the problem.
In this post I’ll explain how to troubleshoot a dead laptop and find the problem. The following troubleshooting tips are not model and brand specific, they should work for most laptops.
Let’s take a look at two different scenarios.
Example 1. The laptop is absolutely dead.
When you plug in the power adapter and press on the power button, there is no signs of life at all. The laptop will not make usual noises, LEDs will not light up, the fan will not spin, the screen is blank and black, etc… In short, the laptop is dead.

What you can do in this case?
1. Make sure the wall outlet is working and the laptop DC adapter is getting power from the outlet. Try another wall outlet.
2. Test the laptop DC power adapter, make sure the voltage output is correct. You can test the DC power adapter with a voltmeter.
3. Let’s say the DC adapter is fine and the adapter outputs correct voltage. In this case unplug the power adapter from the laptop, remove the battery, wait for 1-2 minutes, plug in the adapter and try turning on the laptop again.

OK, you tested the adapter and it’s bad. If you decide to replace the original DC adapter with a generic one, you’ll have to follow this rule:
The voltage output on your new adapter has to be exactly the same as on the original adapter. The amperage on the new adapter could be the same or higher.

If nothing helps and the laptop is still dead, apparently the motherboard is fried or there is a problem with the DC power jack. It’s possible the DC power jack is broken and the motherboard is not getting any power from the adapter. In this case you’ll have to disassemble the laptop and replace the power jack.
Example 2. When you plug the DC power adapter and press on the power button, the laptop starts making normal noises, the LEDs work properly but noting appears on the screen. The laptop will not start.
First of all, take a closer look at the LCD screen. Look at the screen under bright light. It’s possible that the image is still on the screen but it’s very faint.
If there is no image on the laptop LCD screen, test the laptop with an external monitor. Connect an external monitor to the VGA port on your laptop and turn the laptop on. You can toggle video output between the internal LCD screen and external monitor by pressing Fn and F4 keys simultaneously on HP laptops, Fn and F5 keys on Toshiba laptops, Fn and F7 keys on IBM laptops. Other laptops may use different key combinations.
Let’s say the external monitor works fine but the internal LCD screen has no image at all. If that’s the case, your problem could be related to the LCD screen or the video cable. Also, make sure the video cable makes good connection with the motherboard and the LCD screen. Try reconnecting, reseating the cable.
In my case, both internal and external monitors were absolutely dead. Neither of them had image. That means the problem is not related to the LCD screen or the video cable. From my experience I know that this problem could be related to the laptop memory.
Try reseating the memory module, maybe it’s not making good connection with the memory slot. Try cleaning contacts on the memory module with pen eraser. Try moving the memory module into another slot. Try replacing the memory module with another known good module, it’s possible that your original module is dead.
If you have two memory modules installed you can try removing them one by one, it’s possible that one of the modules is bad. Try installing different memory modules into different memory slots.

In my case reseating, swapping the memory module didn’t help. I was pretty confident that my problem is not memory related and I moved on.
Try removing battery, hard drive and DVD drive and turning on the laptop without these components.
Also, try turning on the laptop with an external monitor when the video cable is unplugged from the motherboard. If the laptop start with video on the external monitor, apparently there is something wrong with the laptop display panel.
Finally, disassemble the laptop and removed the motherboard.
1. Motherboard. Like on most laptops, in my case the video card is integrated into the motherboard
2. CPU with heatsink and cooling fan.
3. Known good memory module.
4. The power button board witch you need to turn on the system.
5. Working DC power adapter.

Still cannot get any video on the external monitor. The system turns on, the cooling fan starts spinning but there is no video.
At this point I’m 95% sure that the motherboard is dead. CPU failures are not very common, so it must be bad motherboard.





Oct 13, 2009 | PC Desktops

1 Answer

SCREEN WONT TURN ON


Connect an external monitor (CRT or LCD) to the laptop's "VGA-out" port. Then, turn your laptop on. Does it show the usual "start-up" screen, on the external monitor? If so, then either your laptop's screen is totally-dead, or the "LCD-inverter" (a $20 part that takes $50 for a technician to replace) needs replacement.

Or, does your laptop have a key-sequence (LCD-screen-only, LCD-and-external, external-only) that needs to be used to select LCD-only mode?

Apr 23, 2009 | PC Desktops

2 Answers

My laptap screen went dark/ off no light or pectuer on the screen but the coputer com on the on/off swech light com on


Thanks for choosing fixya.com

It could be a few things, most likely it may be the backlight. The backlight is a small long bulb that sits at the bottom or top of the lcd screen to light it up so you can see whats on the screen.

Sometimes tilting the screen back in the right light you can see a very faint image on the screen.
The other option would be the board that converts the signal has malfunctioned on the computer. Both will require someone to check the laptop and possibly take the screen apart. If the laptop is under warranty you might be able to send it in for free to be fixed.

Otherwise a local shop should be able to help you with the issue.
Replacement bulbs range in price depending on the laptop anywhere from $50 up to $200 depending on how much the shop is going to charge for installation.

Hope this helps, feel free to ask further if needed.

Jei

Dec 17, 2008 | Gateway PC Desktops

2 Answers

Lcd screen faint display works ok with external monitor. model argo c


Could be the backlight of the laptop. When the laptop is running try tilting the screen back and forward till you notice what may be your OS...

If so your gonna have to contact a local repairer for your laptop brand...

Oct 13, 2008 | PC Desktops

1 Answer

I have a packard bell EASYNOTE MZ36 the screen has gone blank, not even a faint image on the screen. but works fine on a external monitor?


First try and press and hold the FN key and then press the F4 key. The screen will disappear from the external monitor and should appear on Laptop. Try a few times and see what happens. This is a common problem and usually can either be a keying error or the back light operation of LCD screen needs replacement. Cost can vary from $70 - $150 AU. Go to ebay and find if there is a replacement for you. See how you go and let me know!

Sep 25, 2008 | PC Desktops

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