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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.
-Brye

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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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Hi...Brye,

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.


all-lights-lcd-screen-4ztirbadqll2ypvmakqp10pq-2-0.jpg
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.
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http://www.laptoprepair101.com/wp-images/white-screen/1-laptop-white-screen.jpg
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http://www.laptoprepair101.com/wp-images/bad-laptop-video/washed-lcd-image-1.jpg
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.
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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?






OH,.......I'M JUST KIDDING!



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,

http://en.wikipedia.org/wiki/VGA_Connector

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 ]

http://battery-adapter.com/product_info.php/products_id/3408/vAspire+5532+Series

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

http://www.youtube.com/watch?v=9_UtDnQuQUA

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)
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https://www.laptopscreen.com/English/model/Acer/ASPIRE~5532/

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,

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

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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.

Regards,
joecoolvette

http://solutions.3m.com/wps/portal/3M/en_US/NA_Optical/Systems/BehindTheScenes/Optics101/

Click on the monitor icon

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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.





OH I'M JUST KIDDING!



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