Question about ViewSonic VA520 15" Flat Panel LCD Monitor

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The monitor goes almost completely dark. To the point I have to use the desk lamp to see the desktop. Twice it's happened in the past 1-2 months. I cant remember how I or it corrected itself the first time. This time I tried shutting it down for 5 min and rebooting but the prob still exists. I'm letting it sit for an hr then I'll try again. Any ideas?

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  • 239 Answers

Well it's a defective "back light" found behind the lcd panel
It's a hardware issue my dear..

Posted on Feb 05, 2010

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Posted on Jan 02, 2017

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CN-0G606T-74261-23Q-0RHL


LCD (pre the manual you threw away, and my exp.)
1: does it have A.C. power, use a desk lamp to test that jack.
2: does the power lamp come on, ? on monitor.
3: does the OSD work? (press mon, keys? see a box> )
4: does the monitor work on other systems, PC,TV,laptops.etc?
5: try a new cable?

if all 5 fail, or to correct it, the monitor is toast.

Oct 03, 2013 | Dell U2711 27 inch LCD Monitor

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My dell inspirion 6000 laptop screen goes black but sometimes I can see the windows screen but it's very dark. When I attach it to a desktop monitor it works fine but the laptop is still dark. Sometime the...


The back light is the whole of the screen, the screen is illuminated by a CCFL lamp (fluro tube) on the bottom of the screen. A inverter supplies high voltage to this CCFL lamp.
If your laptop appears to boot up and the hard disk LED flashes, then the problem is probably a back light fault. This can be a faulty inverter or a faulty CCFL lamp. Please click on this link and follow my instructions to identify the fault and possible fix :-
http://www.fixya.com/support/r3598095-faulty_laptop_lcd_screen

Feb 08, 2011 | Computers & Internet

1 Answer

New monitor purchased with a package with compaq desk top, but trying to use with a Acer desk top, screen comes on , but then goes completely dark after about two seconds. If switched off then on, again...


Could be a faulty monitor, or could be missing the driver information for the monitor. Usually when you first connect it will use a generic driver to start but then should automatically download and install the correct driver information for the monitor. Could also just be a faulty cable, power or VGA, HDMI, which ever you are using. Try using different cables first, then you can google search for the correct driver and manually install it.

Aug 22, 2010 | HP Compaq Q2159 21.5-Inch Widescreen LCD...

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Trying to run monitor from my lap top and goes in to autoconfig and I see my desktop, when autoconfig is complete, I get blank screen.


In general more info is required, but most likely this is an issue with your display settings. Try the following:

1) Try pressing the Fn and Display buttons (at the same time) on your laptop. Try it once, twice, and then a 3rd time.

Chances are that your laptop is displaying in a resolution that is not completely compatible with your monitor, so when the display settings are switched from laptop LCD and montor, to monitor only, the resolution should adjust automatically.

2) If that doesn't help you, try lowering or adjusting the resolution on your laptop. If in XP, right-click on the desktop and go to Properties, and select the tab for display settings and adjust it. If in Vista/7, right-click the desktop and select Screen Resolution/Display Settings and adjust it there.

Good luck. Let us know what happens!

Feb 16, 2010 | Acer AL1912 19" LCD Monitor

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I have a lcd veiwsonic VA1918WM 19" widescreen first it turn off when any thing happen black e.g game loading, dark movie etc but its button always on so i push the button twice and it disply come but...


If it is running hot in only one inverter sections (there are two inverter circuits, one for top lamps, one for bottom lamps) you have have bad capacitors in the transformer circuit, if it is running at the wrong frequency due to bad capacitor, you will have to find out. It can also be bad high voltage transformer itself. Does the P60NF06 has the same ON resistance as the original, also gate capacitance is also important.

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I have a HP Pavilion laptop ze4900. Every time I move th screen, the display either goes off completely, or it goes vey dim and I cannot read anything from it. The only thing I can do to get a display


You could have a defective screen - a defective inverter or a CCFL lamp.
To determine if you have a LCD screen or video card problem, read this and follow the 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.
  • 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 it up, 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.

May 03, 2009 | Computers & Internet

1 Answer

Monitor L17AMTN flashes WinXP desktop, then blanks.


dmellman, Before you open it up, try this! With fully booted pc and WIN DESKTOP screen up, reconnect the L17AMTN . Have a bright flashlight handy so that when the lcd screen flashes on for 1 second and then goes dark, you will want to check to see if the desktop remains on the screen even though you think it went away. Shine the light 1-2 inches from screen at different angles. Has the desk top completely disappeared or is it still being displayed? Do you know about Cold-Cathode-Fluorescent tubes and their Inverter type power supply? I assume that this unit also has a "lay on floor black box switch-mode-power-supply" that is supposed to supply raw 12v-14v dc to the monitor? This symptom is typical of lcd monitor power supply failure, and or inverter board failure. Not to mention the fact that the CCFT's could be a bit tired from use. YOUTUBE has some videos on taking apart lcd monitors. also do search on web for "bad caps on lcd boards" or "bad caps in lcd monitors". I should think that this Tatung might suffer from swollen cap-itis. get back to me with results of your investigation. Im louie12fix on fixya or lmistyrel@aol.com just nrth of Windy City

Apr 17, 2009 | Tatung L17AMTN 17" Flat Panel LCD Monitor

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

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Laptop Screen dark yet computer works with external monitor


does the fan work ok? and do you have a laptop holder for it or you just have it on a desk ....get a laptop holder for it if you do not have one and as for the rest goto the power mangment area on the computer and see if the monitor might be on stand by after a few min ...

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