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Model P244W, Monitor goes blank. In the past I have performed the procedure of disconecting the power cord and then holding the power switch on for a couple of minutes and reconnecting the power and this has solved the problem. However, this no longer works.

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Hi,


Most probably the back light inverter board is bad.
LCD's use four small cold compact fluorescent bulbs to back light the display. (That's what gives the LCD its brightness allowing you to see it)
The inverter board runs these lights and when they go bad they will typically show symptoms like you have or the monitor power light comes on and you have either no display or a very dim display.
If you ever have one that has no display but the power light is on you can check by shining a flashlight directly into the LCD from the front (right into the screen) if you can see an image then it's either the inverter board (most likely) or the CCFL bulbs have gone bad.
The inverter board and CCFL's are replaceable.


Also check the link bellow related to your query:-


http://www.build-your-own-computers.com/top-5-reasons-why-a-monitor-goes-blank.html



Please accept the solution if it's helpful. Do get back to us for any further query.

Posted on Sep 29, 2010

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Perform a Soft reset:
s.gif
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s.gif
Introduction Perform a semi-full reset to set all user menu settings, telephony parameter settings, country/region and language UI, fax memory settings, fax journal information, speed dial and broadcast lists, personal header information, and junk fax settings to the default settings. Performing a semi-full reset of the All-in-One
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http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01457329&cc=us&lc=en&dlc=en&product=1153494

Or a Full reset:
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00720248&cc=us&lc=en&dlc=en&product=1153494

Click on this link or copy and paste the complete link into your browser.
If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
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I was thinking about your problem, I just had a similar issue and the problem is that the inverter or the power supply with an embedded inverter had gone bad.

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The only way to fix this is to open up the FPD:

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2.Open the back by pulling the cover off
Remove 7 screws holding the frame and the power button for the LCD

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5.Choose your model
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replace the inverter with well known good one

Your FPD has 2 boards(Power with inverter on edges, Logic Video)
replace the power board with a well known good one

6.Then do steps 1-5 in reverse order(putting your FPD back together.

I hope this is significant help



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