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LCD cutting out

LCD goes black as if the laptop lid was closed. Button is in the up position but screen goes dark. If I press and release the plastic button that shuts down the monitor when the lid is closed, the screen is viewable for a bit, then cuts out again.

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In the absence of any flickering, I think it is the inverter for the backlight that has developed a heat problem.
Experiment with this; tilt the laptop, raising it in the rear with anything that does not appreciably block air flow, then use a fan placed behind it aimed at the underside of the case.
If the time before death (blackout) is extended, then it is as described above. If it makes no difference, then it is likely only the fluorescent backlight lamp itself.   

Posted on Dec 15, 2008

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1 Answer

Screen goes black close lid and open screen works fine


what configuration of the power manager do you use? laptop goes to hibernation mode automatically or by pressing the power button or by closing the lid?

Feb 04, 2014 | Dell Inspiron 1420 Laptop

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Dell Inspiron 1525 laptop screen goes dark


Hey Lea,
Try the steps below to see if they will resolve this issue that you are having with your computer. If this does resolve the issue you can email me. My email address is listed below in my sigfile.

1) UNPLUG THE LAPTOP
2) REMOVE THE BATTERY
3) HOLD DOWN THE POWER BUTTON FOR ABOUT 30 SECONDS TO 2 MINUTES
4) THEN PUT THE BATTERY BACK IN
5) START IT UP..

Thank You,
Dell-Jesse L
Dell Social Media and Communities
email jesse_leonard@dell.com

Apr 13, 2013 | Dell Inspiron 1525 Laptop

1 Answer

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

Compaq presario cq61 screen went dark but can still see window faintly through the dark sreen.


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 back-light stays off even when you open the LCD screen or turn on the laptop. The switch turns off the back-light when you close the LCD display to save the laptop battery power.

If no luck, try to remove battery and drain the power, then replace battery and turn on.

If that didn't fix it then there are 3 things that could have gone wrong:

1. Video cable connection from inverter to LCD got loose. To check this, follow instructions from step 3 on how to open the LCD and check if cable is fitted properly.

2. The video inverter is faulty
The screen inverter failure is very similar to the back-light lamp failure. In both cases the screen gets very dark and the image on the screen becomes very faint, barely visible under a bright light. If it's still under warranty, take it for a replacement. You can replace this otherwise - you can find the inverter under the screen, follow the procedure described at point 3 to open up the screen.

3. The LCD monitor is faulty
If it works on an external monitor most likely the LCD is faulty and needs replacement. If it's still under warranty, take it for a replacement. If not, you can do it yourself, it's pretty easy. Remove the rubber covers on the side of the screen, unscrew the screws take the plastic cover off, disconnect the video inverter and put in the new LCD after you connect the video inverter to it.

Jan 06, 2011 | PC Laptops

1 Answer

Video problem. Pavilion ZE4805US laptop


Most likely it is either a bad lcd inverter, due to the fact that you have clear picture on an external monitor. The inverter reduces the voltage coming from the motherboard to a lower level in order to power the lcd and the backlight. If this goes bad then you either get a picture randomly, a dim picture, or no picture on the lcd.

Feb 05, 2010 | HP Pavilion Ze4805us Notebook

2 Answers

Laptop screen goes dark.


Is your computer setup to go to sleep when you close the lid?

Click on start -->control panel-->power options and then check the option that says choose what closing the lid does. You have to change this setting to 'do nothing' if you want the computer to stay on when you close the lid.

May 19, 2009 | HP Compaq Presario C700T

3 Answers

Screen goes black


Could be a loose cable connection the cable that runs between the LCD and the laptop my come loose from time to time and the screen will go black you have to be carful with this because you may be shorting out the inverter and eventuly you will have no picture it should be and eas fix if the cable is loose Go to the manue or service guide and find out how to open the Lcd cover behind the Lcd sceen there should be a connector make sure it is properly connected

Mar 24, 2009 | Compaq PC Laptops

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