Question about Computers & Internet

2 Answers

Why are all the lights on LCD screen on? - Computers & Internet

Posted by Anonymous on

  • Gar
    Gar Jul 01, 2015

    Hi Anonymous, I want to help you with your question, but I need more information from you. Can you please add details in the comment box?

    What lights are you talking about? I'm unaware of lights on an LCD screen.

×

Ad

2 Answers

David Payne

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Computers & ... Master
  • 14,162 Answers

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.


Why are all the lights on LCD screen on? - 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.
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.


http://www.laptoprepair101.com/wp-images/white-screen/1-laptop-white-screen.jpg
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.

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.
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.
REFERENCE: http://www.laptoprepair101.com/troubleshoot-fix-laptop-video-problems/
GOOD LUCK.

Posted on Jul 01, 2015

Ad

sansar repair

  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.

  • Contributor
  • 1 Answer

Use http://www.lcdrepairrohini.com/ get complete solutions in delhi Home page LCD Repair Rohini Delhi

Posted on Feb 18, 2016

Ad

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

0helpful
1answer

Mitsubishi ws-48413 will not turn on or off. The only sign of life is the green power light stays on and will only go out if I unplug the tv. The green light comes back on as soon as the tv is plugged back...

Https://www.Abctay.com is an online shop ,
We sell television and electrical accessories,all kinds of TV power supply board, logic board, TV LED screen,
TV LCD screen, mobile phone screen, as well as various types of electronic tools,tv parts power supply,LCD,ccfl ,
LED,OLED,lcd panels,HMI,Inverter,LCD screen,lg screen,display screen,lcd monitor,lg lcd, lg monitor ,flat screen ,
touch screen,hmi,bulb,samsung, innolux ,Mitsubishi,philips, hitachi,auo,innolux,Planar, toshiba, siemens,chi mei,Weinview,
Infineon,industrial LCD,industrial control, sharp monitor,vigor plc,delta, mitsubishi lcd,omron plc,etc
0helpful
1answer

Why is my replaced lcd screen not lighting up?

1) Wrong LCD screen

2) Video Cable (LCD Cable) is not connected tightly.
Motherboard side, or LCD screen side; or both.

3) IF, a screen Inverter is used, the small cable from the Video Cable, that connects to the screen Inverter; is not connected, or has a loose connection to it. (screen Inverter)

4) An LCD screen, and a screen Inverter are a Matched unit.
If it's the wrong LCD screen......................?

5) IF, a screen Inverter is used; the diagnosis was wrong, and the LCD screen was replaced.
90 PERCENT of the time, the fault is a bad screen Inverter.

A) Laptop's LCD screen uses a CCFL, (Or more than one), for a Backlight; the laptop uses a screen Inverter.

Diagnostic flowchart leads from Graphics Chipset, to Video Cable, to screen Inverter, THEN, LCD screen.
Expensive LCD screen was replaced, instead of the actual part that needed replacing;
Video Cable: $9 to $22
Screen Inverter: $9 to $22

LCD screen: $60 to $245

B) Laptop's LCD screen uses LED backlighting, and does NOT use a screen Inverter:

Diagnostic flowchart is;
A) Video Cable;
A Video Cable should have it's connections PHYSICALLY checked.
You have to try to push the connectors in tighter.
Visual inspection alone will NOT do.

Making sure the Video Cable connections are tight, and this does not fix the problem, then the Video Cable needs to be removed; and every wire in the Video Cable checked for Continuity with a multimeter set to OHM's. (1K)

Not feasible, then take the Video Cable down to the nearest small computer shop; and have the resident tech check it for Continuity.
Should only be a few bucks.

Or just replace the Video Cable.
(Parts changing I know, but...........?)

Primer:
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)

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 large than 1/16th of an Inch.
Average thickness 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/

A screen Inverter is used to convert the power, (Electricity), from the laptop; for the LCD screen, and Backlight.

As previously stated, Backlighting that uses CCFL, uses a screen Inverter.
LED backlighting MAY, or MAY NOT use a screen Inverter.
When the LED backlight technology first came out, it seems some did use a screen Inverter.
It also seems as the technology advanced, LED backlighting does Not use a screen Inverter.

Regards,
joecoolvette
0helpful
1answer

Changed the lcd screen but all i have is a white screen

1) Loose connection of the Video Cable TO the motherboard, and/or TO the back of the LCD screen.

Can easily happen when reassembling.
(If you can't reuse the sticky tape on the back of the LCD screen, that holds the Video Cable to it, use more tape )

2) Incompatible LCD screen.
MATCH up the manufacturer's numbers on the back of the old LCD screen, to the new one.

They MUST crossover, and match up, if they are two different LCD screen manufacturers.

The screen Inverter is MATCHED to the LCD screen, also.

Matching up the Model Number, (Product Number for HP), may not be all the info you need.
Matching the numbers off of the old screen, for the new one, is.

http://www.sparepartswarehouse.com/HP,Mini,1000,Laptop,LCDs-Displays.aspx

Under the red heading - Find Your Spare Parts - click on the blue Down Arrow to the right of the - Choose Model - box.
What Model is yours?

Write down the manufacturer and product ID number.
Now go to the far upper left of the page. In the box under - Part Number Search, type the letter/numbers for your old LCD screen.

On the page that comes up. Do they match?
Putting the letter/numbers in for the LCD screen you just purchased.
Do they match?

IF the old LCD screen works at all, reconnect it, and see if it works.
If so the LCD screen you purchased does not.

3) Make SURE the screen Inverter cables (Wires) are connected tightly.

[ Check the connection of the Video Cable to motherboard first.
Then the Inverters wires, then the Video Cable connection at the back of the LCD screen ]

Primer:
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 a series of LED lights

The HP Mini 1000 series of Netbook PC's uses a CCFL.
Cold Cathode Fluorescent Lamp.

Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.

OR a series of LED lights. Depends on the model. (8.9 inch LCD screen models usually use CCFL. 10.1 models usually use LED lights)

A screen Inverter (FL Inverter) is used to convert power from the laptop, for the Backlight, and LCD screen.

Make sure there is 6 Volts DC power going through the Inverter.

[ NOTE*
90 PERCENT OF THE TIME the fault is the Inverter ]

http://h10025.www1.hp.com/ewfrf/wc/manualCategory?cc=us&dlc=en&lang=en&lc=en&product=3832471&

HP Mini 1000 and Compaq Mini 700 - Maintenance and Service Guide

For additional questions please post in a Comment.

Regards,
joecoolvette
0helpful
2answers
0helpful
2answers

Lcd light

More than likely you will need to replace the LCD screen. The backlight may have burned out making it blank.

A new LCD screen runs about 15 dollars shipped from ebay2.gif.

The W580i LCD screen is very easy to replace. Probably one of the easiest I have ever done.

Check out the following link for instructions on replacing the LCD display and links to buy the screen.

Sony W580i LCD Screen Replacement

I hope that helps you out
2helpful
2answers

My phones display lights are not working.

Friend, it is in the keypad/light interface be sure it is firmly attached.press a little of that connection to restore the lights.
1helpful
1answer

No display light

It is possible that the backlight on your LCD is burned out. If you have a friend with a Sidekick LX, see if you can swap the lcd screens quickly. This will let you determine if it is the phone or the LCD screen

Here is a link to show you how to remove and or replace the Sidekick LX Screen

Sidekick LX LCD Screen Replacement

3helpful
2answers

Blinking green light, will not power up

my 55613 tv wont turn on just blinking green light
1helpful
2answers

My screen is blank

Is the screen white or just dark?

Fix Sidekick White LCD Screen

If it dark or no light at all then

replacement of the Sidekick 3 LCD flip screen.

to buy a sidekick 3 lcd screen look here.
http://www.repairmysidekick.org/Sidekick-LCD-Screens/buy-a-t-mobile-sidekick-3-lcd

Look for one that has the torx screwdriver included
1helpful
2answers

The LCD screen is hard to see. What should I do?

If the LCD screen is too bright or too dark, adjust the LCD Brightness setting in the Setup Menu. If you are shooting photos outdoors in bright light, move the joystick to the icon showing the sun over shaowed area to turn on Outdoor mode and make the LCD screen easier to see in bright light.
Not finding what you are looking for?
Computers & Internet Logo

Related Topics:

130 views

Ask a Question

Usually answered in minutes!

Top Computers & Internet Experts

Ekse

Level 3 Expert

13435 Answers

Brad Brown

Level 3 Expert

18803 Answers

Cindy Wells

Level 3 Expert

6356 Answers

Are you a Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...