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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Re: lcd display mainly just white
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!
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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.
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,
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,
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.
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..
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....
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.
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. Mike
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;)