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Lcd display mainly just white

I recently had a backlight issue with one of my monitors. i decided to fix it. unfortunatly it was the first time ever attempting. i discovered that two capacitors were bad (bulged caps), so i took the same rated capacitors out of an older crt monitor. got it pretty much all back together, fired it up and now all i get is a white screen with some streaks of pink and blue....? before the "fix" i could see the desktop if i shined a flash light at it. all i did was replace the capacitors and now nothing but white annoying screen. any ideas on what went wrong. it would be so appreciated. thank you.

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  • bryewyck82 Sep 14, 2008

    fix-4u, r u talking about the bios in the monitor itself? there are a few colors on the screen but mainly white



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Well... you've fixed the inverter problems, but another problems has pop-up...It's seems you probably burnt out the chipset that contains the bios. That's why the screen turned white... cuz no information in the bios. You'll need to updated the bios or just replaced a new AD Board. Have fun...Good lucks!

Posted on Sep 14, 2008


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Why are all the lights on LCD screen on?

How to troubleshoot and fix video problems
Here are some tips and tricks for troubleshooting and fixing laptop video problems. Video issues are very common within portable computers and with the following tips you should be able to detect and eliminate basic laptop video problems.
Laptop LCD screen has a faint image.

Look at the LCD screen very closely and check if you can see a faint image on the screen. It's possible that the LCD lid close switch stuck in the "closed" position and the backlight stays off even when you open the LCD screen or turn on the laptop. The switch turns off the backlight when you close the LCD display to save the laptop battery power. Check the LCD lid close switch. Usually it is a small plastic pin located close to the LCD hinges. Try to tap on the switch a few times to turn on the backlight. If after tapping on the LCD lid close switch the backlight stays on, you fixed the problem.
It is also possible that after tapping on the LCD lid close switch the backlight works fine, you see a normal video on the screen for some time and then the backlight turns itself off again. In this case I would blame the FL inverter board. Try to reseat cables on both end of the FL inverter to make a better contact between the cables and the FL inverter board. If it doesn't help I would try to replace the FL inverter board.
Laptop LCD screen is solid white color.
Most likely it is just a bad connection between the LCD display and the system board. I would try reseating the video cable connector on the back of the LCD screen first and check if it fixes the problem. After that I would try reseating the video cable connector on the system board. I would also try reseating cables if there is no video on the LCD screen at all.
Try to connect the LCD screen to an external monitor. If the external video is fine, you have a problem with the LCD screen or the LCD video cable. You can try to fix the problem by reseating the video cable on the back of the LCD and on the system board.
If you see the same garbled video output on the external monitor most likely it is not the LCD screen problem. In this case the system board (with onboard video) is bad or the video card is bad.

Jun 30, 2015 | Computers & Internet

1 Answer

I recently replaced the battery in my acer aspire 5532. Less than a week later when I turn it on the screen remains black. You can hear the computer starting and the indicator lights turn on but nothing...

Oh, OH!..........................

1) Does the laptop feel warmer than usual?

2) Have you noticed any strange behavior?

Staying up late at night?
Excuses why there are DVD's all over the place?
Refrigerator door is left open?

Any mention, why there is an M1A2 Abrams tank sitting in the living room?


A) Laptop on, take a flashlight, and shine at the LCD screen; at various angles

See faint images?

(Ah HA! Busted! Somebody's holding a thin curtain up inside the Display Assembly!........................Not funny?..................K)

B) I would like you to connect a VGA monitor, to the VGA port (connector) on the laptop.
This test will show us if the laptop is working okay, but the problem is the Video Cable, or inside the Display Assembly.

It also tells us if the graphics chipset is good.

Laptop OFF, monitor OFF, connect a VGA monitor; to the LEFT side of the laptop; and to the Blue VGA port.

This is a general example of a VGA connector (port), and VGA Cable,

Scroll down a little for the VGA Cable example.

You can use one of the older CRT types of monitors, (Looks like a small TV), or a flat LCD screen monitor if it has a VGA cable.

C)Turn the monitor on. If a CRT type allow it to warm up.
Turn the laptop on.
By factory default settings the display should automatically, on the external VGA monitor.

IF not;
There are at least 3 display options available;

1) Internal monitor of laptop ONLY
2) Internal monitor of laptop AND external VGA monitor
3) External VGA monitor ONLY

Press, and hold the Fn key down, and at the SAME time tap once on the F5 key.
The F5 key is the Display Toggle-Over key

Still no?
Hold the Fn key down again, and tap the F5 key once more.

IF, the display shows on the external VGA monitor, then the problem is the Video Cable; or inside the Display Assembly.

[Inside the Display Assembly would be screen Inverter, or LCD screen ]

The plastic frame in front of the LCD screen, is the Display Bezel.
Acer? LCD Panel Bezel, or LCD Bezel

Go to 0:45
The green rectangular object that was behind the Display Bezel, and is mounted to the bottom of the LCD screen; is the screen Inverter.
As you can see it's a green colored, rectangular circuit board.

Just showing you location. If it is decided to replace it, I will step by step you through the procedure.

Now a small primer if I may;

An LCD screen cannot produce light. It needs an additional light source.
A Backlight is the additional light source.

A Backlight can be a CCFL, (Or more than one), or a series of LED's
(Light Emitting Diode)
As far as I can tell the Aspire 5532 uses one (1) CCFL for a Backlight,

However, Laura, this is not 'etched in stone'.
If your Aspire uses LED's for a Backlight, it will be stated on the Palm Rest Cover.

A CCFL is a Cold Cathode Fluorescent Lamp. (Bulb)
Similar to Fluorescent lighting used in homes, and businesses; but on a much smaller scale.

Average thickness is 2mm. That is a little larger than 1/16th of an Inch, or about the width of this capital letter -> O <-

Average length is almost as long, as the LCD screen is in height.
View the last 8 photos,

A screen Inverter is used to convert the power (Electricity), from the laptop; for the LCD screen, and Backlight.
90 PERCENT of the time, the fault can be attributed to a bad screen Inverter.

CCFL backlighting uses a screen Inverter.
LED backlighting GENERALLY does not.

Primer over.

Please post in a Comment, as to whether the display shows on the external VGA monitor.
We will diagnose from there.


Click on the monitor icon

Apr 08, 2013 | Computers & Internet

1 Answer

Monitor is dark. how to fix?

Walt, hold the Fn key down again, and tap once more on the Acer, F5, Display Toggle-Over key.

There are at least 3 display options available;

1) Internal display of laptop ONLY

2) Internal display of laptop AND external display

3) External display ONLY.

Were you just using the external display for more 'display real estate room', or was/is there a problem with the internal display of the laptop?

Was no problem? Is now? Even when using the guidance stated above for the Fn and F5 key?

Then if your laptop uses a CCFL for a Backlight, it also uses a screen Inverter. Screen Inverter is bad.

If it doesn't use CCFL/s for a backlight, and uses LED backlighting, replace the LCD screen.
The LED backlighting is incorporated in the LCD screen assembly, and you ain't replacing it.
Replace the entire LCD screen.

Post the laptop manufacturer name, and model number in a Comment. Model number is on Bottom of laptop.

Try to hurry as I'm going to a meeting with the head of General Motors, (Obama), and later with Bill Gates.



Nov 14, 2012 | Computers & Internet

1 Answer

Display or power issues with my 17'' LCD screen (SVA LCD #7500L )

Check the high voltage ballast transistor.. see if one of them is burnt... If none.. it could be overheating when supply with current. The ballast transformer supply high voltage for the backlight inverter..If these were overheating then the supply voltage for your monitor will be unstable.

Check also the backlight inverter (cold cathode light) if it is busted.. the function of this backlight inverter is to give display image on the screen.. If these were busted then what you will be seeing is black on your screen. You can also replace this.

Please rate this solution if this help you. thanks..

May 27, 2010 | SVA-USA VR 17S 17" Flat Panel LCD Monitor

2 Answers

I have a Dell laptop D505. The laptop powers up but the screen display is very dim. I can't see the image on the monitor. I've tried to manually increase the color/brightness button and nothing changes. ...

Sounds like your inverter or your backlight is failing. The inverter is an easy repair, the backlight can be replaced but it involves taking the LCD panel apart, The backlight comes installed on new screens. I can include a service manual below and possibly a generic guide to backlight replacement....

Sep 23, 2009 | Dell Latitude D505 Notebook

1 Answer

LiquidVideo L17LCD2 17 in. Flat Panel LCD Monitor - Power Issues

firstly stop turning it off and on because you will blow something else like a power board then it will be a big paper weight.
next get a torch and when it is powered on and supposed to be showing images, shine the torch at the screen.
if you can see everything then you have a broken backlight or problem with your backlight and connections.
they cost approx £15 and a little labour, its not a big job. you may be able to do it yourself if you can get hold of a service manual.

Feb 26, 2009 | Liquid Video L17LCD2 17" Flat Panel LCD...

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Hello My Dell Vostro Laptop Display Not Working Correctly it showing Dim but in other desktop when i connect to the Laptop Of Mine it showing Correctly With No Dim Problems? How can I fix the Problem?

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Most often the all white screen is the result of a missing voltage to the LCD panel. We usually find an open fuse on the panel circuit board. Unfortunately replacing the fuse does not usually fix the problem.

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internal power supply failure,the AC power supply that powers the backlight fails every time you turn it on. Unfortunatly electronic repair is costly, A new monitor is cheaper.

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Look at the main power board. Near the black plug that goes to the audio board you will see a round metal disk with the number 100 on the top. This is a 100uf capacitor. In all likelyhood this is the problem. We recently had 12 go bad at work and we fixed 10 of them by replacing this cap with a $1.29 electrolytic cap from Radio Shack (this cap looks different but works the same). Just remkove the old one and surface solder this one in (pay attention to polarity +leg to + mark on board;)

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