Question about HP Compaq WF1907 Monitor

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W1907 Monitor Goes Blank

I have this monitor its works but when i tried to open a porgram or i switch off the monitor and put it back on it would flash and goes blank i have to keep pressing the power button on the monitor a couple of times before it come s on

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  • Anonymous Jun 27, 2008

    I had the same problem. Screen would often go blank when entering or exiting a program, usually a game. Happened in both DVI and VGA modes. Pressing MENU then SELECT would sometimes be enough to bring it back (monitor would switch to inactive input, then back, the video would reappear but often re-disappear in one second). The blank screen was actually an extremely dim image. Plugging cable into known good monitor showed video signal was fine. New drivers downloaded, no help.
    The solution: I returned the monitor to the store and exchanged it for a new W1907. It works!


  • Anonymous Jul 13, 2008

    I am having the exact same problem, specifically when exited a full screen game mode. Have to press power button several times before screen will stay on. Also another problem, goes blank after the screensavers been on awhile (I use my own photos) and when I get it back on, all my pictures are black and white. Tried changing resolution and refresh rate, nothing works.

  • Anonymous Jul 13, 2008

    Am having the same problem, had my new monitor for about 2 weeks now. Screen goes blank, especially when exiting a full screen game. have to press power button many times before it'll stay on. Also another problem I've encountered - I use My Photos screensaver. Screen goes blank after screensaver is on a while, when I move the mouse, it comes back but all my pics are black and white. I've turned off the hibernate and sleep modes and have tried to refresh and change resolution. Nothing works.

  • swhaley927 Sep 02, 2008

    My boyfriend and I bought 2 hp computers with the w1907 monitors. When exiting games, receving an email notification, or being interupted by an update, my screen goes blank as well. This is happening to both new monitors. I have to push the on andoff button onthe monitor up to ten times before it begins to work again. It is frustrating.

  • blackaurora Sep 22, 2008

    Is replacement the only solution? I'm having the same problem with my hp w1907. It's good to know I'm not the only one experiencing this.

  • dyulehnikz Oct 04, 2008

    Adsadsadsadas

  • foggybottom Oct 30, 2008

    Exact same problem!

  • Anonymous Mar 31, 2009

    same here.

  • Sage8 Apr 28, 2009

    Same problem - after beeing on a while (between 15 mins - 2hrs) screen flickers and dims a bit, then a while later it goes blank (blue power light still on).  Menu is not visible when pressed.  Removing power for a while (and probably letting it cool down) restores the display when turned on - but I'm sure it is a bit dimmer than normal.  


    Does it with DVI & VGA and from different video cards - so almost certainly a hardware problem with the monitor.


    Does anyone know how to get the back of these.  I got the 3 screws and the stand off, but then what?  It all seems to be clipped together. 

  • Anonymous May 05, 2009

    Same problem would like to know how to open up the screen, anyone had any luck

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If you still have this monitor type, you are obviously no longer under warranty and need some help, not "smart alek" or "return" it advise.

The issue is with the power board that feeds the inverters which in turn power the CCFL bulbs. This monitor incorporates the power board and inverter board into one unit. If you have ruled out loose wires at the bulbs, which makes no sense if they are coming on for a bit anyway, then check this:

On the power board you will see some "mosfet" switches that are glued to an aluminum heat sink. They are a black squarish chip soldered to the board and using an aluminum heat sink to dissipate heat. One in particular is screwed to the heat sink and this is your culprit. Take the screw out and carefully bend the chip away from the heat sink. Clean all the old thermal grease off both items and replace it with actual computer thermal paste. In my case I use "Arctic Silver". Place a small bead of paste diagonally from the lower corner of the switch to the upper opposite corner then carefully bend back in place and replace the screw. Give the paste a day to fully cure then reassemble the monitor. That is it! I have repaired 6 as of this posting and all are still working with no image loss. Keep in mind, this is only a repair suggestion for an issue of the loss of backlight. Power light stays on, image can be seen with a flashlight shined on the screen and if turning monitor off and back on the screen looks normal for a few seconds.

Now those of you that want the "why" behind all this: Mosfet's are used to turn on or off a device like an on / off switch. Power to one side, device connected to another side and a trigger to connect the two together. On this monitor design voltage goes to the mosfet and waits for the trigger (hey I want to see something on the screen message) to close the switch thereby passing power on to the next device which is the inverter circuit. Power hits the inverter circuit board and it swings into action inverting power from AC to DC to run the CCFL backlight bulbs. This monitor has two inverters each running two bulbs for a total of 4 bulbs. This light travels through fiber optic style plastic that illuminates the lcd image from behind (thus the name backlight) and viola!! Image.

Posted on Oct 15, 2011

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  • Jerry Perry
    Jerry Perry Oct 16, 2011

    I got in a hurry and forgot the rest of the "why". LOL. The mosfet gets very hot doing it's job so it needs a good conductive contact with the aluminum heat sink to shed the heat. The paste used by the factory just did not cut it and replacing it with some rated for computer CPU's does the trick.

  • Jerry Perry
    Jerry Perry Oct 20, 2011

    Bit me in the behind. I just repaired another one and this fix did not work. So... I suppose try it before you junk it. Otherwise there are some Japanese sources that still sell the power / inverter board for around $40.00 USD including shipping. Good luck !!

  • Jerry Perry
    Jerry Perry Oct 20, 2011

    This is a seller that claims to have them: dongwandewang@yahoo.cn part number 715G2888 Version B (hoping the version is an updated one). I will soon let you know once it arrives.

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My hp 6440 monitor w1907 gets black for second when i click mouse my e-mail add. talathhava@yahoo.co.in

Posted on Jun 23, 2008

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To all that have this problem with the HP W1907 Call HP and demand an RMA, It is a hardware problem. A defect in the monitor.

Posted on Jul 14, 2010

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Screw you people it's been years on this site that this problem has been listed and no one has come up with even a REASON why it happens to everyone so someone could attempt to fix it who was good with electronics or w/e.

Posted on Aug 28, 2009

  • NeoEpiphany Feb 17, 2011

    Reason found. It's the backlight bulbs - or the power supply to said bulbs. I took my w1907 apart (after an hour of careful prying - it's like an Ipod) and discovered four tiny, little, burnt out fluorescent bulbs. The approximate cost to order new ones is $10 or so apiece, the power supply $75. I decided to go with a new (bigger!) monitor for $150, but at least I fully satisfied my curiosity about how my monitor was put together.

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I had the same problem. Screen would often go blank when entering or exiting a program, usually a game. Happened in both DVI and VGA modes. Pressing MENU then SELECT would sometimes be enough to bring it back (monitor would switch to inactive input, then back, the video would reappear but often re-disappear in one second). The blank screen was actually an extremely dim image. Plugging cable into known good monitor showed video signal was fine. New drivers downloaded, no help. Powering monitor off and back on would often be required.

The solution: I returned the monitor to the store and exchanged it for a new W1907. It works!

Posted on Jun 27, 2008

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2 Answers

The power button flashes between blue and yellow. The monitor screen stays black. I have the exact same monitor and switched it on to my other computer, and the computers are both working fine.


perrycdoq, Did you do flashlight test? Is your monitor also "blank"? Did you visit this old net blog? http:///www.lesliewong.us/blog/2005/05/02/hp-pavilion-f1703-flat-panel-display-blackout-solution/ Do some reading there then come back and tell me if you think same thing might be wrong with your unit. Will you do the troubleshooting or contract out the work to qualified electronics technician to fix units "switch-mode-power-supply / inverter ballast circuit? 12fixlouie

Oct 03, 2010 | HP w1907 LCD Monitor

1 Answer

Monitor will come on, monitor status box will come on and then screen goes blank. How can I fix this?


rwhite97, If your pc is working fine with substitute monitor, and w1907 lcd unit does same (black screen, or blanknblack screen) when connected to a "known good" pc, then you should visit and read some stuff at this 2005 blog. http://www.lesliewong.us/blog/2005/05/02/hp-pavilion-f1703-flat-panel-display-blackout-solution/ Then learn the flashlight test and what it means. Then go to YOUTUBE for video clips on lcd monitor disassembly and lcd monitor repair if you are into do-it-yourself repair. Remember this!!! Your w1907 unit uses the same basic design and operation principles that ALL brands of ccfl back-lit lcd monitors use. Good luck with the repair. Come back here and leave comment after doing your research/investigation and then rate this response. 12fixlouie

Jul 16, 2010 | HP w1907 LCD Monitor

1 Answer

Screen goes blank.Shut it down and retsart and it works OK for mi


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 HP 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://en.wikipedia.org/wiki/Capacitor_plague

http://www.badcaps.net

May 15, 2010 | HP w1907 LCD Monitor

1 Answer

My hp w1907 monitor goes dim after start up. It


More likely to have problem in the power supply, back light inverter circuits, or worst will be bad lamps. Look for bad caps with bulging top first, post back what you see so we can guide you further, see example of failed monitors mostly due to bad caps: http://s807.photobucket.com/home/budm/allalbums

Feb 19, 2010 | HP w1907 LCD Monitor

1 Answer

Computer screen goes blank after a couple of seconds


the back light of my hp w1907 will only come on for a second than go back off?? the rest of the monitor is working can see the image if you shine a light on the screen ..any help??
Comments: Oct 26, 2009 - so this monitor was not in warranty so i took it apart i found a wire broken off one of the backlight bulbs, ( be very carefull the bulbs all four of them and the lcd screen are very very fragile ) so i soldered the wire back on and put it back together and rechecked it it has been working like new

Nov 24, 2009 | HP w1907 LCD Monitor

1 Answer

Monitor goes black


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I also have a hp w1907 monitor which also powered on for a second and then go blank with the power light still on.. it was out of warranty so I had no loss so I took it apart..I found one of the wires broken at one of the backlight bulbs { becarefull they are fragile and there is four of them, two on the top and two on the bottom... and the lcd screen is very fragile } I soldered the wire back on and it all work fine... just remember where all the screen parts go.

Oct 24, 2009 | HP w1907 LCD Monitor

1 Answer

I turn my monitor on and it lights up then goes blank.


sounds like you have a backlight problem, the wires are known to burn off the ends of the bulbs of the back light..if you try to repair it yourself be careful the lcd screen and bulbs are frigile.. there is 4 bulbs two on the top and two on the bottom of the screen ,, keep every thing in order when taking apart

Aug 01, 2009 | HP w1907 LCD Monitor

1 Answer

The W1907 goes blank when i turned the monitor off and then on


I would say don't turn off the monitor at the switch at all unless you are not going to use it for a long time. I just leave mine switched on and the power save blanks the screen if I am away from it for 20 minutes. I leave my PC switched on all the time as well. If I need to use it for any reason it takes ages for it to start up fully so it's more convenient to just leave it all going so it's ready when I need it. If away from the PC for a day or more switch it off but I keep going back to it all day and night so it's easier for me to leave both on all the time.

Jun 17, 2009 | HP w1907 LCD Monitor

1 Answer

Screen comes on briefly then blanks out.


check inverter, memory, and powersupply.

May 31, 2009 | HP w1907 LCD Monitor

1 Answer

No sound from my HP w1907 monitor


This is a failure in the audio section of the control circuit. Your cable could be at fault or the circuit itself. Try switching cables or try you monitor on a different sound source. if this does not work then it is the monitors sound circuits. This requires a trip to a service center for servicing. Hope this helps.

Apr 07, 2009 | HP w1907 LCD Monitor

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