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Screen comes on then goes dark turn it back off and same thing comes on and then goes dark you can barley make out imagies on screen

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If you plan to DIY repair, then please read below and look at the pictures at the link I provide so you will know what to look for inside the monitor.
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://www.badcaps.net
http://en.wikipedia.org/wiki/Capacitor_plague

Posted on May 12, 2010

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My htc has a dark screen and still works and by dark i mean you can barley see any thing but sometimes the screen goes back to normal light


Is your phone a smart phone?? Does it have something called ambient light sensor (light sensor).??? Check your phone manual. If that is the case then you can turn it off. Ambient light sensor is a function that senses the light outside and automatically adjust the brightness of the screen. But sometimes it goofes up. So you can go to settings> display settings> brightness> if it is auto then turn it to manual as per your convenience. Again depending on your phone model the settings may vary. I hope this helps.

Jan 17, 2014 | HTC explorer

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I turn my tv on the picture and sound all work and after about 20min the picture goes to a black screen and I still have my sound. I turned the tv off wait about 5 min turn it back on the picture come on...


If you have electronics experience - check the power supply and make sure you are getting the correct voltage to your inverter boards and main av board - also do you see any movement on the screen take a flashlight and shine on the screen - if you can see a dark image on the screen check inverter boards and power first.

thanks,

michael

Mar 21, 2011 | Element Electronics FLX3210 32 in. LCD TV

1 Answer

DELL 2208WFP LCD-Comes on normally, but almost immediately goes dark You can see something on the screen if you look closely. Turn it off and back on you see it then dark. any help?


Hello,

I believe the power led button is still on while the screen goes dark, if yes, it means the picture board of your monitor is bad that is why it appears for a second and goes dark after that

Since the power led button is on, It means the picture board on your monitor is faulty that is why it appears for a second and goes dark.

The best thing for you to do now is to take the monitor to a local repairer or any service center within your vicinity to help with the replacement of the picture board because the fault is not something you can fix yourself in other to complicate issues.

Take care.

May 01, 2010 | Dell UltraSharp 2208WFP 22" Widescreen LCD...

1 Answer

After booting my screen goes dark


Goes dark or just stays dark ? if stays dark then it is the GPU causing problems as it has got too hot at some point, possibly due to lack of ventilation underneath. What sometimes works for me is to turn the machine on and flip it over and rest it on say a tea towel, but have the screen overhang the edge of table so it doesnt damaged it. Then, you need to cover vents and let the machine heat up for say around 10 mins. After this time, turn machine off and back on again, and you will find the screen will come back on. You should then be able to use machine as normal, but keep all vents clear. Some folk might think this is barmy, but trust me it works on most, HP, Compaq, Dells etc.

Apr 07, 2010 | HP Computers & Internet

1 Answer

Monitor turns on then goes dark


Either the power supply board is failing and needs repair or a bad bulb in the screen is causing it.
You would have to open it up to get a better idea.

Here's some info:
MAKE SURE ALL POWER is DISCONNECTED For at least 5 minutes PRIOR TO WORKING ON inverters.
If your picture wasn't pinkish or dark at the top or bottom when it was working, then it may be the inverter has gone bad. Inverters are like light bulbs and have life expectancies on the capacitors.
If your picture was pinkish or dark at the top or bottom when it was working then you may have 1 or more of the bulbs failing.
You can check for pinkish if your screen flashes.
What you do is when you have it open to the point of getting to the wires that hook to the back of the lcd screen is to disconnect only the wide ribbon that goes from the video board to the back of the screen. Then start it and check the screen flash color.


These come apart a little different than most. The front trim comes off with the screen. So essentially you are removing the back case first:
Once the four screws are out of the rear corners there are snap tabs that need to be released between the silver trim and the back black plastic (three top and bottom and two on left and right.)
You can use a thin knife blade to help release them as you separate the silver from the back plastic Black part has to be bent outwards to release these tabs.
Then entire guts will come out with the screen ., then the inverter is under the center area under the metal cover.
Shout if you need more info.
If you email me a good picture of the inverter in the area of the larger yellow square component and one from underneath , behind the two small yellow square components, I may be able to get a better idea if it is the inverter from a visual.

Email : bammbamm@ptd.net

Mar 29, 2010 | ViewSonic VX715 17" LCD Monitor

1 Answer

Screen comes on then goes dark , turn it back off and same thing comes on and then goes dark you can barley make out imagies on screen


Most monitors failures are caused by failed capacitors in the power supply/Inverter board, you need to open it up and inspect for caps with bulging top/seal, see example of failed monitors due to bad caps: http://s807.photobucket.com/home/budm/allalbums
Post back what you find inside so we can guide you further.

Mar 18, 2010 | Computers & Internet

1 Answer

Screen is dark but icons are barley visible.


What you have is an inverter failure most likely. The inverter takes the AC adapter voltage and converts it to high voltage AC for the backlight bulb. Backlight bulbs rarely fail but the inverters do. Ebay has inverters for around 15-20 bucks. The inverter sits under the lcd panel behind the screen bezel. In most cases, removing the bezel is all you need to do to change the inverter out. Below is a link to the service manual for that model.

When you click on the link go to page 4-61, this is the start of the lcd disassembly. I thing just 4 screws need to be removed and then take your finger nails and pry off the bezel in a small area and work your way around the screen until the bezel comes loose. When replacing the bezel always start at the bottom between the hinges and work your way up and around.

http://tim.id.au/laptops/toshiba/satellite%20m50.pdf

Jan 18, 2010 | Toshiba Satellite M55-S135 Notebook

1 Answer

The LCD does goes dark after power on


you mean few second the monitor goes in black. then its come. if it happen, it is ok

Jan 21, 2009 | Sony VAIO® VGC-LS37E PC Desktop

2 Answers

Dark Screen


The back light is bad in your monitor. This is the light source that gives light to the image on your screen so that you can see it. This is a common thing to go wrong with a laptop. You can take it to someone to be repaired or if you are handy you can buy the part and replace it yourself.

Jan 18, 2009 | HP Compaq Presario 2200 Notebook

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