What the blank does this mean ...np on led screen

Hi Pascal,
Blank screen and you can not see even the on screen display ( osd ) means the back lights ( cfl or led ) are not working. Please consult someone qualified to handle your set.Unfortunately there is nothing you can do yourself. Good luck.

If it shows only a blank white screen, means, there is no video signal. Just try it with external Ariel and see whether there is picture tunes in. If not, the main board to this set is likely faulty. Contact any service technician. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Pull up older posts. Surf the site with patience. Do a search by type in the brand name of your device at its search box.
http://electronicshelponline.blogspot.com/

Is the computer on and the screen is not? What do you mean it won't "light up"?

Wasatch Techies Smartphone Tablet and Computer Repair in Utah

Do you mean that you have blank copies/prints, or that there is some message on display, or just blinkig red led...?
If yyou have blank copies the problem is in laser shutter.
If you have error message send detailed description.

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Will the power button still be on while the screen is blank? if yes, it means your picture board is malfunctioning.

The picture board on your monitor is bad, since the screen turns blank after two seconds and the power led or button is on, it means the picture board of your monitor has developed fault.

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 order not to complicate issues.

Take care.

1. Try to check if the AC adapter is working.
Check the LED indicator
2. You might need to replace to laptop motherboard
power supply is defective

Thanks. Cheers!

Hello sir; The error code you display E224 its means blanking shutter motor or senser.

SOMEONE TURNED THE CONTRAST BUTTON ON YOUR DISPLAY, YOU JUST NEED TO READJUST BY PRESSING AND TURNING TO DESIRED CONTRAST

Explicit enough to see that's this a a repair shop job. That also probably means a replacement- cost of which will not be much more than repair prices. One thing how ever- the power supply[which would appear to be the problem] is this built into the screen [that is does the screen have mains power direct? Or is it powered from an external 'Power Brick' If it is of the Power Brick type - then a new power supply is the answer - get on of the stabilized universal type with a fistful of connectors and a voltage selector switch.