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My laptop screen is inverted and non stabil .The icons are inverted and the screen moved ininterroply.

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Could have a virus

Posted on Jun 28, 2009

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6ya6ya
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Posted on Jan 02, 2017

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1 Answer

My aspire 5830t screen flicker at startup


I suspect the backlight or inverter may be faulty. Check on flea bay for replacement prices.

Dec 21, 2013 | Computers & Internet

1 Answer

Brightness buttons (f2 and f3 are not working


Not a lot to go on here, Prabhdeep

Need the full model information

Example,
Acer Aspire 5535-5050

Post back in a Comment, or Reply; at end of this solution

Primer:

An LCD screen does not produce light,

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

Click on the monitor icon

Because of this the LCD screen 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)

CCFL = Cold Cathode Fluorescent Lamp (Bulb)
Similar to Fluorescent lighting used in homes, and businesses; but on a MUCH smaller scale.
Average thickness is 2mm, or a little more 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.

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

View the last 8 photos

(Do they break easily when trying to remove, and replace?
OH, YES!)

A screen Inverter is used to convert the power from the laptop, for the LCD screen, and Backlight.
If the laptop uses LED backlighting, it MAY or MAY NOT use a screen Inverter.
Generalized thinking (Can also be stated as 'Rule of Thumb'), is that if the laptop uses LED backlighting, it does NOT use a screen Inverter.

I also feel into this line of thinking, since none of the LED back-lit laptops seemed to use a screen Inverter; that came to the shop.
I have found this to be a fallacy from on here,......FixYa.....
I have looked up two laptops using LED backlighting, and discovered they also used a screen Inverter.

Now I post LED backlighting may, or may not use a screen Inverter.
Seems when LED backlighting first came out, a screen Inverter was used on some models.
Also seems as the LED backlighting technology progressed, no screen Inverter is used.

90 PERCENT of the time, the fault for bad Backlighting can be attributed to a bad screen Inverter.
Of course, this IS IF the laptop uses a screen Inverter.

For a laptop with LED backlighting that does not use a screen Inverter, and backlighting is bad (Dim, or non-existant), the next hardware part in the diagnoses to replace, is the LCD screen.

I now await the information I asked for above.
Then we can diagnose together.

Regards,
joecoolvette

May 09, 2013 | Computers & Internet

1 Answer

Gateway m280 notebook black screen.


Why did you replace the lcd inverter? Were you able to barely see icons on the desktop which is an indication that the lcd inverter is bad? If not, then you need to replace the lcd screen. If you could barely see the icons and you replaced the lcd inverter, then the inverter is bad. Just because the inverter is new does not mean it works. If the video shows on the external monitor, but you can't see anything on the laptop's screen even when you shine a flashlight on it then the lcd screen is bad.

Shine a flashlight on the dark screen to see if you barelysee the icons on the desktop. If so, then the LCD Inverter is bad.

Plug in an external monitor and see if the display shows up on it. It can beany kind of monitor even the old big fat crt monitors as long as it has a vgacable to connect to your computer's vga port. If so that proves yourvideo card is ok. The video will show on most systems when you rebootwithout you having to do anything. Some systems will require you to hit the FN(Function key) + F1 thru F12. Hold down the FN key then hit the correctkey for displaying on the monitor (F1 thru F12). The correct key willnormally have CRT/LCD on it or it will have the icon of a display.

If you see no icons by shinning a flash light and the external monitor works,then your screen is bad.
If you see no icons by shinning the flash lightand nothing shows on the external monitor, then most likely your video card isbad.

May 24, 2012 | Gateway Computers & Internet

1 Answer

Gateway laptop powers up but screen does not come up.


Why did you replace the lcd inverter? Were you able to barely see icons on the desktop which is an indication that the lcd inverter is bad? If not, then you need to replace the lcd screen. If you could barely see the icons and you replaced the lcd inverter, then the inverter is bad. Just because the inverter is new does not mean it works. If the video shows on the external monitor, but you can't see anything on the laptop's screen even when you shine a flashlight on it then the lcd screen is bad.

Shine a flashlight on the dark screen to see if you barely see the icons on the desktop. If so, then the LCD Inverter is bad.

Plug in an external monitor and see if the display shows up on it. It can be any kind of monitor even the old big fat crt monitors as long as it has a vga cable to connect to your computer's vga port. If so that proves your ideo card is ok. The video will show on most systems when you reboot without you having to do anything. Some systems will require you to hit the FN (Function key) + F1 thru F12. Hold down the FN key then hit the correct key for displaying on the monitor (F1 thru F12). The correct key will normally have CRT/LCD on it or it will have the icon of a display.

If you see no icons by shinning a flash light and the external monitor works,then your screen is bad.
If you see no icons by shinning the flash light and nothing shows on the external monitor, then most likely your video card is bad.

May 24, 2012 | Computers & Internet

1 Answer

My Laptop Backlight switches off, after windows start-up..I need to get this fix or advice will do..


If you can barely see the icons when you use a flash light to shine on the screen, then you lcd inverter is bad. Replace the lcd inverter and your screen will be ok.

May 22, 2012 | Dell Latitude E5400 Laptop

1 Answer

Screen flickers when not plugged in.


hi, it seems like a battery or lcd inverter issue, the voltage is fluctuating somewhere - could also be on the motherboard, but the first thing i would check is the battery as it has a circuit which stabilizes the current going into the laptop, as you're saying that it stabilizes when you insert the charger, it looks like the issue is somewhere between the battery cells and the screen as the charger bypasses the need for the battery, the next thing i'd check is the inverter, peace, abz

Jan 19, 2011 | Computers & Internet

2 Answers

My laptop screen went black every thing is working but i cant see anything what might be the problem


hold the unit slihtly to a light if you can see the icons dimly on the screen then your screen has gone into freeze mode if you cant see the icons then your screen is probly blown to reset the screen from frozen it needs to be un plugged from the motherboard and plugged back in the plug is located under the panal above the keys

best luck

Oct 14, 2010 | Computers & Internet

1 Answer

Inverter wires


Normally, LCD plugs are non-reversible. just follow he guide groove on the sides of the plug.

Sep 24, 2008 | Acer Aspire 5600 Series 5630-6951 Laptop

1 Answer

Dim Monitor


It sounds like the screen inverter is going out. The inverter works in this way: The power supply cuts the amount of power going into the board down, however the screen needs more power to enable it to function properly, so the inverter boosts the power back up to a level that the screen needs. If the inverter starts to go out it can create a multiple amount of indications that are noticable on the screen, one of them is darkening of the screen. It could also be the screen itself, but I'm leaning towards the inverter.

Jun 18, 2008 | KDS Valiant 671DP Notebook

1 Answer

IBM t20/t23


Hey, Laptops are very fragile and sensitive components! If you feel that you are capable of task like this then godspeed! Something like that could be three things! 1.) Your screen inverter has gone bad! The inverter is the device that provide high voltage power to the lamps in your screen! 2.) The lamps in your screen are bad! These things are usually rated for like 50000 hours. 3.) It could be as simple as servicing the laptop(cleaning up the contacts and ensuring good connection) Laptops come in all shape and sizes, and worse some come with a thousand screws of different sizes! It should be relatively easy to take down but the hard part is putting it back together. I have this friend who, after he re-assembled a laptop, always has extra screws!! He says the laptop don't need em! LOL What i would suggest is moving the entire screen, that way you don't have to take it apart to get to the inverter( should be the only other device located in your screen aside from the actual LCD(the lamps are in the LCD) The models sound very similiar but not sure about them either, it the screen looks the same then you can change it! Practice taking down the t20 first then if it breaks you'll know how NOT to break the t23! lol I would always recommend getting a pro to handle something like this though, cause is very tedious you have to be real careful! Best of Luck! regards, babb

May 01, 2007 | IBM ThinkPad T23 Notebook

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