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LCD screen stopped displaying the text.

Screen has been blackened even if restarted. But once in while it appears for few seconds. The computer is able to boot.

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I have lenovo g550...my screen flickers in every 5minutes...


Failing Inverter An inverter, typically found inside a laptop computer, consists of a small board, which has impregnated electronic circuits stamped on it. Inverters look like thin boards about the of two sticks of chewing gum. The inverter and its bulb control the intensity of the liquid crystal display, which lights the screen monitor. The computer can control the output voltage of the inverter and either lighten or darken the screen. A special type of inverter can adjust the brightness of the screen by using an internal sensor to judge the room brightness, and then adjust the screen accordingly. Failing inverters give off some specific warning signs, which can be recognized by observing different screen characteristics.

Short Intermittent Display Upon turning on the laptop, the screen flashes on in the normal mode for a short period and then blinks to black. A very faint image appears in a dark background, which will be very hard to see almost invisible. After shutting off the laptop and restarting, the same mode occurs, where the screen appears normal for a few seconds then fades to black. This condition points to a failed inverter. To confirm this, plug in an operational external monitor; if the external monitor functions, the inverter has failed. b> Total Blackout with Ghost image b> The laptop turns on, as indicated by the power supply button, but the screen comes up black. The screen comes up black after restart. You might be able to detect a very dim or ghost-like image on the monitor. When you plug in a known functioning external monitor, the external monitor operates normally. This mode of display indicates a failed inverter. b> Long Term Periodic Operation b> With this failure mode, the laptop screen illuminates normally upon start-up and remains that way after several minutes, hours or even days, until it goes very dark again. Brightness controls or restoration attempts do not work. Most often, the screen will function normally with a computer restart, but will eventually return to black. Faint ghost images might appear, as seen in the total blackout mode. b> Dark With Color Variation b> Upon computer start-up, the monitor shows black or dark gray, accompanied by very faint images. The screen might have an intermittent color change, or remain on with a non-standard color variation, like pink or red. b> Auto Control Switch b> If the screen appears black, with no faint or ghost images, look for the lid switch near the back hinge. The switch, when depressed with a closed lid, shuts off the computer and monitor functions. Sometimes the switch becomes stuck in the closed position, disallowing the computer and monitor to turn on when opened. Pushing the switch manually several times can often free it up. If the switch tab has broken or jammed inside the case, it needs replacing. b> Loose Connection In this mode, the display looks normal upon start-up, but tapping the side case of the computer turns the screen black. More tapping results in the screen functioning normally then cutting out again. This condition points to a loose wire connection from the inverter to the LCD backlight lamp, or the video cable. The connectors can be accessed by removing the monitor bezel screws and pulling the plastic retainer off. Both connectors can be cleaned and refitted.

Feb 10, 2013 | Lenovo G550 PC Notebook

1 Answer

My lenovo LCD screen is flickering black and striped lines, how to get it fixed in Richmond Hill Ontario


Laptop computers have LCD displays that are sensitive to many things. LCD displays have faults that sometimes produce a flickering screen, lines, dots or a faint display. These screens are sensitive to magnetic fields or electronic items near the computer. Speakers, cell phones, lights and other electrical items are examples. Your display also could be flickering due to software issues such as the video drivers or hardware issues relating to the inverter going bad or the LCD screen itself needing to be replaced. Trace the cause of your problem to come to a resolution.

1.Turn off the computer. Disconnect all external devices. Turn the computer over (bottom facing up). Take out the battery and reseat it. Turn the computer on.
2.Reset your resolution and refresh rate.
Windows XP:
Right click an open area on your desktop. Click "Properties" in the drop-down menu.
Click the "Advanced" button at the bottom of settings tab. Another dialog box appears. Click the "Monitor" tab. Change the Refresh rate to your default, or 60 hertz. Click "OK."
Windows Vista:
Click "Start, Control Panel." Find and click "Appearance and Personalization." Click "Adjust Screen Resolution." Change resolution to the default, or 800 x 600. Click "Advanced Settings." Click the "Monitor" tab. Change the refresh rate to the default, or 60 hertz. Click "OK."
Windows 7:
Click "Start, Control Panel." Find and click "Display" Click "Change display settings" on the left side. Change screen resolution to 800 x 600. Click "Advanced Settings" in the lower right. Click the "Monitor" tab. Change the refresh rate to 60 hertz. Click "OK."
3.Check the computer's surroundings. Move away any speakers, fluorescent lights, fans, cell phones, radios and any other electrical device that can cause flickering. Temporarily move electrical items away from the computer to see if they are producing this issue.
If the flicker stops, put back one item at a time to determine what is causing the problem.
4.Connect an external monitor to your laptop computer to see if that screen is also flickering. If there is no flicker, then the problem is strictly with the laptop, indicating a possible hardware failure. Contact the manufacturer for a replacement LCD.
If the flicker continues, go to next step.
5.Reset/Update your video driver. Click "Start" and right-click "My Computer." Click "Properties." The "System Properties" dialog box will appear.
6.Click "Device Manager." A list of items will appear. Click the (+) sign next to "Display Adapters."
7.Right-click the video adapter and click "Uninstall." Confirm removal. Restart the computer. The video driver will automatically reinstall itself.
8.Check to see if the flicker still exists. If so, go to the manufacturer's website. Download and install the newest video driver and BIOS for the computer.
9.Restart computer once drivers are installed. Continue to the next step if there is still flickering.
10.Open up your display screen all the way. If the flicker stops by opening it a certain distance, it is the display inverter. If the flicker still exists, the LCD screen should be replaced.
11.Contact the manufacturer of the computer for more information and a possible replacement inverter and LCD display. This will depend on the manufacturer and the computer itself.

I hope you find it very helpful. Thanks

Sep 05, 2011 | Lenovo 3000 N200 Notebook

1 Answer

My laptop emachine g720 screen flickering


Laptop computers have LCD displays that are sensitive to many things. LCD displays have faults that sometimes produce a flickering screen, lines, dots or a faint display. These screens are sensitive to magnetic fields or electronic items near the computer. Speakers, cell phones, lights and other electrical items are examples. Your display also could be flickering due to software issues such as the video drivers or hardware issues relating to the inverter going bad or the LCD screen itself needing to be replaced. Trace the cause of your problem to come to a resolution.

1.Turn off the computer. Disconnect all external devices. Turn the computer over (bottom facing up). Take out the battery and reseat it. Turn the computer on.
2.Reset your resolution and refresh rate.
Windows XP:
Right click an open area on your desktop. Click "Properties" in the drop-down menu.
Click the "Advanced" button at the bottom of settings tab. Another dialog box appears. Click the "Monitor" tab. Change the Refresh rate to your default, or 60 hertz. Click "OK."
Windows Vista:
Click "Start, Control Panel." Find and click "Appearance and Personalization." Click "Adjust Screen Resolution." Change resolution to the default, or 800 x 600. Click "Advanced Settings." Click the "Monitor" tab. Change the refresh rate to the default, or 60 hertz. Click "OK."
Windows 7:
Click "Start, Control Panel." Find and click "Display" Click "Change display settings" on the left side. Change screen resolution to 800 x 600. Click "Advanced Settings" in the lower right. Click the "Monitor" tab. Change the refresh rate to 60 hertz. Click "OK."
3.Check the computer's surroundings. Move away any speakers, fluorescent lights, fans, cell phones, radios and any other electrical device that can cause flickering. Temporarily move electrical items away from the computer to see if they are producing this issue.
If the flicker stops, put back one item at a time to determine what is causing the problem.
4.Connect an external monitor to your laptop computer to see if that screen is also flickering. If there is no flicker, then the problem is strictly with the laptop, indicating a possible hardware failure. Contact the manufacturer for a replacement LCD.
If the flicker continues, go to next step.
5.Reset/Update your video driver. Click "Start" and right-click "My Computer." Click "Properties." The "System Properties" dialog box will appear.
6.Click "Device Manager." A list of items will appear. Click the (+) sign next to "Display Adapters."
7.Right-click the video adapter and click "Uninstall." Confirm removal. Restart the computer. The video driver will automatically reinstall itself.
8.Check to see if the flicker still exists. If so, go to the manufacturer's website. Download and install the newest video driver and BIOS for the computer.
9.Restart computer once drivers are installed. Continue to the next step if there is still flickering.
10.Open up your display screen all the way. If the flicker stops by opening it a certain distance, it is the display inverter. If the flicker still exists, the LCD screen should be replaced.
11.Contact the manufacturer of the computer for more information and a possible replacement inverter and LCD display. This will depend on the manufacturer and the computer itself.

I hope you find it very helpful. Thank you for using fixya.com

Aug 19, 2011 | PC Laptops

1 Answer

I have a problem about my laptop if i turn it on my screen are still blank but my laptop is still working.. can i ask if what is the problem about my laptop. pls help me... tnx!


Although your Toshiba portable computer appears to be on and running, there is no image on the built-in LCD display screen Look closely at the LCD display screen. If you can see a faint image on the screen, the display screen's fluorescent backlight may be turned off. Shining a flashlight directly at the screen will make it much easier to see whether or not there is a screen image actually present, though not lit up. On most Toshiba portable computers, there is a small plastic or metal pin near one of the LCD display lid hinges. When the display lid is shut (closed), this pin is pressed against an internal switch which turns off the backlight, saving battery power. You may be able to turn the backlight on again by tapping this pin repeatedly. The normal screen image will then suddenly appear, or re-appear.If there appears to be no display image at all, the problem is probably not related to the backlight. In this case, press and hold the Fn key and then press the F5 key several times, pausing several seconds between each keypress. This will cycle through several display output modes: Internal, External, Simultaneous, and possibly one or two more.If no image appears on the LCD display after cycling through the Fn-F5 sequence, try doing so with an external CRT monitor attached, if possible. If you still see no image, on either screen, try restarting the computer with the CRT monitor connected.If you see a screen image that looks normal when the computer is first powered on, or when you try to enter the BIOS Setup during the power-on sequence, it's an indication of a software problem (a driver or an application that's launched while the computer is loading Windows, possibly). Try downloading the display drivers for the computer from the Toshiba Support website, and then re-installing them.If the LCD screen or an external CRT monitor is blank only while the computer is first powered-on, but then works fine, it's probably not an indication of a problem. Some models display no text or images during the startup process. Additionally, installing some Windows Updates may delay the appearance of the familiar Windows desktop.If there are blank margins bordering the image on the LCD screen, launch the Windows Control Panel, then double-click the Display icon. Click the Settings tab, and then adjust the Screen Resolution setting until image fills the entire LCD screen, which will cause the margins to disappear.If the font size on an external CRT monitor seems too small for comfortable viewing, try clicking the Advanced button on the Settings page, and then adjust the DPI (dots per inch) value. Try 120DPI and 135DIP, to begin with. Avoid changing the DPI to much greater values, in order to avoid settings that will be difficult to change.
  1. Hold down the power button for approximately 10 seconds until the computer turns off.

  2. Verify that neither one of these keys are stuck in the down position:

    the Tab key (arrows pointing left and right)

    the tilde key ( ~ and ` characters)

  3. Turn the computer on.

  4. If either of the keys above appears to be stuck in the down position, and if the issue is not corrected by pressing these keys repeatedly, then service is required.

Aug 17, 2011 | Toshiba Satellite L455D-S5976 Notebook

1 Answer

The laptop stays on for few minutes and then it turns itself off but before it does that, it shows a large blue scree and some large white text, the text flicks a little but fast to the point where I can...


First of all Turn of your laptop.
Now this time when you turn on your laptop start tapping F8 Key on you keyboard when you Toshiba logo. Tap F8 key for at least 5-6 times.
You will get a Windows Advance Option Menu. You will see lot of options over their written in white text. Your mouse will not work on this screen. Use UP and DOWN arrow keys on you keyboard and highlight Last known good configuration. Once highlighted press enter on it. See if you computer boots. If it boots try doing a restore.
If it doesn't boot.
Turn off your computer and then turn on your computer. On Toshiba Logo screen tap F8 key once again and go to windows advanced option menu screen once again and this time hightlight Disable automatic restart on system failure. Now when you see Blue screen coming up on your computer once again your computer won't restart. Now you can write down the information to trace out the blue screen that is occurring on your computer. Write down the Error code which will be in form of STOP 0x000000XX, you find this error code somewhere at the bottom of the blue screen.
Once you get the reply here, we will see what we can do.

Jun 21, 2011 | Toshiba Tecra M2V-S310 Notebook

1 Answer

I have a presario cq61 and have forgot my password can u help


Try starting the computer in safe mode. Turn on the computer and once the COMPAQ screen clears press F8 a few times - don't hold down the key however. Winodws stops loading at teh Startup Options screen (black, text only). From that menu use the cursor keys and ENTER to select "Safe Mode". Once Windows loads (it may look humungous!), login as the Administrator (which should now be visible). Use this account to reset your forgotten user password. Restart once complete - the computer will automatically start normally.

Apr 14, 2011 | HP Compaq Presario CQ61420us Notebook

2 Answers

Broken screen, external monitor via VGA won't


Press "Fn+F7" once, wait a few seconds, and press it again, to "cycle" through all the possibilities (LCD-only, VGA-only, both).

Try the monitor with some other computer (desktop or laptop) to see if the monitor works at all.

Restart your computer -- does the initial "splash" screen (showing CPU speed and RAM-test) show? Does the "Windows" screen (with the crawling worm) show on the external monitor?

Nov 16, 2009 | Lenovo 3000 N500 Notebook

3 Answers

I turn my l300 on and than stops at toshiba leading innovation. it won't do any thing when i press f2 or f12 thanks


I have had this problem several times with other Toshiba notebooks to the extent I almost cringe when anouther person tells me they are once again having the same problem. Hopefully, the following steps I give you will correct your problem... if not, your mobo may be damaged.

There are 2 levels of checking I want you to go through in order to try and fix this. The first is a minimally invasive procedure which wont require significant intrusion into the chassis. The latter will require a more involved dismantle of the laptop for troubleshooting . . . but first:

Rule out the obvious and maybe make it all better in a couple of easy key strokes >>>>
Please don't be offended or insulted by this first, very rudimentary check. I am sure you have already checked this,but just in case, this very simple next check could mean the difference between enduring 30 seconds of embarrasment and 300.00 for a new laptop because something got hosed when you cracked open the chassis unnecessarily trying to fix a sneaky,common issue. Try starting the computer and as it turns on, simultaneously press the “Fn” key and whichever numeric key also shows a monitor image and the text: LCD/CRT. This is a key combo switch that tells your computer to route the display output to an external monitor instead of the laptop panel. There are 3 possibilities – LCD (laptop screen) Only --- LCD and CRT (external monitor) Simultaneously – and CRT -(external monitor) Only. Try pressing the FN and numeric key combo a couple of times in succession immediately when the Toshiba Splash Screen appears – this is generated by the system BIOS and just because you see the splash screen only means that the laptop may be still set to output to an external display device only and just has not executed that instruction yet. I would also attach an external monitor to the laptop and try to boot.... if the display appears on the external, or if hitting the key combo causes the laptop LCD to come back on, then stop, grab yourself an ice cold Rolling Rock Beer (or Coke if you are not 21) and celebrate a simple easy conclusion to another laptop Maalox while pondering the exact phrases of praise and admiration you will be sending to Fix-Ya about me later from your restored lap-top. :-) If still no display.... take a deep breath and lets try the following procedures in the following post (too much text for a single post sorry)

Jul 25, 2009 | Toshiba Satellite Pro L300-EZ1005X...

1 Answer

Blue scree, or system crash


This link should help you a lot. The problem is an unmountable boot volume.

http://www.techtips4u.com/kb/sw/SW00014.htm

Please let me know if this helps you out.

Mar 12, 2009 | Dell Latitude D600 Notebook

2 Answers

LCD starts to display for about 2 seconds then goes dark.


lamp(s) perhaps.... with an LCD monitor (the desktop kind) you can shine a lite behind it. if you can see things on the screen it's the lamps... if you can't it's something else.

Robert

Aug 28, 2008 | Toshiba Satellite 1135-S125 Notebook

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