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My display is intermittent, bright to dark

Display is intermittent, bright to dark. I have to click on the screen to get back to normal

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Go to the settings and turn the power saver OFF

Posted on Apr 16, 2015

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My sony pcg-71912L screen was replace and no back light


Was the replacement complete with the inverter and was it new?

Jul 17, 2014 | Sony VAIO Computers & Internet

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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

Led display shut down when the detector detect an alert


You have the unit in dark mode. Press the Dim/Dark button again to get the unit to full brightness. THe unit has 3 levels of DIM. First the unit is at its full brightness, pressing the dim/dark button will dim the display and the unit functions normally. Press the Dim/Dark button again will futher darken the display but when the unit alarms the display is turned off and remain off during the alert. After the alert is over the unit waits 20 seconds of no alert to turn the display back on.

Mar 09, 2011 | DE-1740 Radar Detector

1 Answer

I have noticed the screen is now not as bright as it use to be, still works just not bright. A darker look is the best way to describe it


Hi,

The most common indications of a weak bulb in a Sony LCD Rear Projection TV are:
  • Dimimage with low brightness and contrast.
  • NoPicture, Dark Screen.
  • Shadowsin Image, sometimes circular.
  • Intermittent Shutdown.
  • Fluctuating or Flashing Brightness.
  • Longerthan Normal starting time.
Also check for distortion caused by Optical Engine Failure. If any of these faults are present, bulb will not fix. Sony Optical Engine Fault Gallery

Here is a link for Identifying Sony TV Lamps.

easyab@hotmail.com

Feb 11, 2011 | Sony Grand WEGA KDF-60WF655 60" Rear...

2 Answers

Computer turns on and boots up , however, the screen is dark


Try going into the control panel and select power options see if there is way to adjust the display brightness or try holding down the "Fn" key and use F7 to increase the brightness

Feb 07, 2010 | Toshiba Satellite A75-S229 Notebook

1 Answer

Intermitently, my screen goes dark, but the


1.)It could be your video card
2.) Yes it is expensive for a laptop
3.)I would first check your screen setting for turning off display...

If you are using vista:

-Right click on your desktop then choose personalize
-Then click screensaver
-On bottom click on "change power settings..."
- On the left click on "choose when to turn off the display"

Your monitor can turn off without your computer being in sleep mode.

Dec 26, 2009 | Toshiba Satellite A105-S4334 Notebook

1 Answer

I have a plasmasync 42 mp3 and the picture looses about 20% of its brightness. after a while, the normal picture returns but then it switches back to the duller image after 30 min or so. It's not the...


Exactly the same problem here on same model NEC but problem more intermittent, some days can be fine others unwatchable. Can see many dark pixels when i lose brightness, looks a bit like a big square patch over the screen. You ever manage to fix this gemguy?

Dec 14, 2009 | NEC PlasmaSync 42MP3 42 in. Television

1 Answer

Dark image when taking pictures of sceneries


If the pictures show up normal on the computer then the back light for the LCD is going bad...
try to replace the back light..

thank u
rate me!!

May 24, 2009 | Canon PowerShot A550 Digital Camera

1 Answer

Lenova laptop display problem


If the display back light iis dimmer then normal, then it is probably a faulty inverter board inside the laptop.

The inverter board is the board that powers the backlight lamp.

Check display brightness settings and power settings first, to ensure it is not a settings problem..

Feb 01, 2009 | Lenovo 3000 Y410 Laptop

1 Answer

L13V36 Dark Screen, picture can be seen in bright light.


If the backlight lights up for a second it's probably fine - It lay odds on the display inverter in the screen. Actually finding parts for anything made by gateway may be difficult, however. They do not sell spare parts. Considering the size of the LCD i bet it would almost exceed the replacement cost of the screen to repair it

Dec 30, 2007 | Gateway FPD1960 19" Flat Panel LCD Monitor

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