Question about ViewSonic VA1912wb 19" LCD Monitor

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Hi, i have the same problem,actualy it works,can see dark image,only the backlight cut off itself within about a second,it this the inverter fault? colin

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Yes it indicates that the inverter drivers are gone very common in lcds also could be some caps in the inverter stage have vented.

Posted on Jan 05, 2010

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Sounds like the inverter is failing on you. The inverter sends the corrected ac voltage to the backlight. Your is apparently failing shortly after startup.

Posted on Dec 26, 2009

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1 Answer

Inspiron 6000 laptop - no pix on pc lcd but displays on a connected lcd just fine? unit seldom if ever closed.


Check first of all that the lid cut off switch is not sticking, temporarily disconnect this to be sure.
If you are getting an image on an external screen, the problem will most likely lie in two areas:

Inverter
Backlight

Take the laptop into a dark room and power it on. If you notice a faint image on the screen that is very dim, it is the fault of the screen backlight (replace the laptop screen)

If there is NO image even a faint one, it is the fault of the inverter (replace inverter).

To access both, you will need to remove the screen bezel, the battery and the switch cover panel. Getting the inverter off is a matter of unplugging it from the VGA cable and removing the pink and white HT wires to the screen ( NO power must be going through the laptop as you do this because the inverter converts the 19 volts DC into 1000 volts to power the screen.

Getting the screen off involves the above than unscrewing the cover retaining screws and the hinge supports and carefully undoing the vga ribbon cable

Jul 28, 2011 | Dell Inspiron 6000 Notebook

2 Answers

When I turn my TV on there is sound, but, the picture vanishes after a couple of seconds. Why?


The backlight inverter is what powers the screen to "light up." You will need to check your power supply for the proper voltages going to the backlight inverter. If those all check out ok, then you need to replace your inverter to get your image back. You can find a new inverter by searching "inverter + model number of your tv.



Please rate if this helped :)

Apr 04, 2011 | LG Televison & Video

1 Answer

Dell Latituse D600 display goes dark


Hello,

The picture board on your monitor is faulty or bad, since it goes black after few seconds, it means the picture board of your laptop has developed fault.

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

Take care.

Apr 21, 2010 | Dell Latitude D600 Notebook

1 Answer

Dell ADAMO 13 w/Vista 64 Random power failure...goes dead in 1 second. Battery fully charged. Happened with external power and when on battery. I have latest BIOS v6.0. I ran pre-boot diagnostics...


If the power totally fails (i.e. power is cut off, LEDs turn off, fans stop, ... etc), then this more likely to be because of a short circuit developing in a failing semiconductor component, or a power supply problem.
However, if the laptop is still running & only the display on its LCD is cut off but the laptop itself stays powered on, then your laptop might be experiencing a failing screen inverter board, a failing screen backlight lamp, or a failing LCD screen cable.

TYPICAL INVERTER FAILURE SYMPTOMS

1. When you turn on the laptop, the screen lights up for a short period of time and then goes dark. You still can see an image but it is very dark, almost invisible and definitely not usable. When you restart the laptop, the screen lights up and then goes dark again. The laptop works fine with an external monitor.
2. Your laptop turns on but the screen remains dark all the time. You still can see a very dim image outline. The laptop works fine with an external monitor.
3. The laptop screen works fine for hours or even days, but sometimes it goes very dark as it mentioned above. When you restart the laptop, the screen works fine again.

Inverter failure symptoms are very similar to backlight lamp failure symptoms and in most cases you cannot tell which one is causing the problem until you replace either the inverter board or the backlight lamp. From my personal experience, inverter boards fail more often than backlight lamps. If you have to guess, replace the inverter first.

Feb 07, 2010 | Office Equipment & Supplies

1 Answer

Screen stays black when i turn it on. I get no picture at all


Hi,

There are a number reasons why this might happen:
  • The backlight has gone (Find a dark place and shine a torch into the screen and see if you can see an image in the background, if you see an image then the backlight has gone) - Needs a new backlight (Engineer to remove and fit) or have a new panel fitted.
  • The panel has died - Need a new panel
  • A cable has worked itself loose or is broken
  • The inverter has gone - Need new inverter
  • The driver board is faulty
Thanks

Oct 01, 2009 | Sony Televison & Video

1 Answer

My tv turned off ..red lamp light blinking nonstop..what do i do???


Hi,

There are a number reasons why this might happen:
  • The backlight has gone (Find a dark place and shine a torch into the screen and see if you can see an image in the background, if you see an image then the backlight has gone) - Needs a new backlight (Engineer to remove and fit) or have a new panel fitted.
  • The panel has died - Need a new panel
  • A cable has worked itself loose or is broken
  • The inverter has gone - Need new inverter
  • The driver board is faulty
Thanks

Oct 01, 2009 | Sony BRAVIA KDL-46S2000 46 in. LCD HDTV

1 Answer

Screen is black, green light is on. Disk light comes on for a second when power button is pushed, and fan comes on briefly. Otherwise, nothing. Same outcome on AC or Battery or Both. I tried the remove-AC,...


Hi,

There are approx 6 reasons why this might happen:

  1. The backlight has gone (Find a dark place and shine a torch into the screen and see if you can see an image in the background, if you see an image then the backlight has gone) - Needs a new backlight (Engineer to remove and fit) or have a new panel fitted.
  2. The panel has died - Need a new panel
  3. A cable has worked itself loose or is broken
  4. The inverter has gone - Need new inverter
  5. Long shot, the bios has got corrupted - Engineer could re-flash the bios
  6. Long shot, Mainboard onboard graphics has gone - Need new mainboard
My personal opinion is that the backlight or inverter has gone - Either way it needs to be opened up to repair it, consult a service centre and get a quote or repair it yourself if your up for it.

Thanks

Sep 05, 2009 | Acer Aspire 3680 Laptop

2 Answers

My notebook screen 3000 n100 goes dark after few second


This could be a faulty CCFL lamp.
To determine if you have a LCD screen, inverter or video card problem, read this and follow these instructions.
Defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp.
Connect an external monitor to your laptop and power the monitor up first then the laptop, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out
www.lcdparts.net
for parts, repair service and DIY info.

Jul 15, 2009 | Lenovo 3000 N100 0689 Notebook

1 Answer

KDL-42V4100 bravia - no video output.


Hi,

There are a number reasons why this might happen:
  • The backlight has gone (Find a dark place and shine a torch into the screen and see if you can see an image in the background, if you see an image then the backlight has gone) - Needs a new backlight (Engineer to remove and fit) or have a new panel fitted.
  • The panel has died - Need a new panel
  • A cable has worked itself loose or is broken
  • The inverter has gone - Need new inverter
  • The driver board is faulty
Thanks

Jul 11, 2009 | Sony Bravia KDL-42V4100 42 in. LCD TV

1 Answer

Laptop screen illumination


The fault could be a faulty CCFL lamp or inverter.
To determine if you have a LCD screen, inverter or video card problem, read this and follow these instructions.
Defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp.
Connect an external monitor to your laptop and power the monitor up first then the laptop, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out
www.lcdparts.net
for parts, repair service and DIY info.

Nov 03, 2008 | Gateway SL9550-30165318 Notebook

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