I have lenevo B3 series all in one touchscreen pc running windows 7. Nothing is displaying on the screen, just blank, although i hear computer running an booting in the background. How can i resolve

SOURCE: Video Problems with Windows Media Player

Why is the projected video black in the Player? If you can see the Player, but the Video and Visualization pane is black, this usually indicates that your video card is not configured correctly. You can usually correct this problem by changing the video acceleration and/or overlay settings for your video card. To change video acceleration, do the following: 1. In Windows Media Player, on the Tools menu, click Options. 2. In the Options dialog box, click the Performance tab. 3. In the Video Acceleration area, move the slider to adjust the video-acceleration capabilities of your video hardware. Drag the slider to Full to use all available video acceleration. Drag the slider to None to use basic video-acceleration settings that work with most video hardware. To change overlay settings, do the following: 1. In Windows Media Player, on the Tools menu, click Options. 2. In the Options dialog box, click the Performance tab. 3. In the Video Acceleration area, click the Advanced button. 4. In the Video Acceleration Settings dialog box, under Video Acceleration, clear the Use overlays check box.

SOURCE: blank HP w1907

If the power light does not turn color and stay's green on startup, it is not a power problem. It is most likely the inverter. If the unit is in warranty, send it out ASAP. Contact HP customer care by email and have the issue logged in.
If in warranty, they will send you a box by FedX second day and have repaired.
This is a 19" monitor and will not be worth paying for repairs if not in warranty.

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SOURCE: No display in Acer aspire 4520g laptop

Have your laptop check up the technician, it has somethingt to do with your video card

SOURCE: Dell Inspiron E1705 does not show any picture

First of all, check that the laptop is set to output video to the LCD. There should be a function key which will determine whether it is outputting video to the built-in LCD, the external monitor, or both. That should be holding down your "FN" key and hitting "F8." If it is on CRT ONLY, it should switch within 1-2 keypresses.

Secondly, take a good bright flashlight and shine it directly at the LCD panel from about 1-2 inches away. If you can actually see the graphics on the screen faintly in the background, your backlight is not turning on. The backlight is literally a bulb which lights up the screen, and they can burn out. It is repairable, and shouldn't cost more than $150.00 from a reputable repair shop.

SOURCE: BIOS POST message cannot be displayed and Setup does not run

As soon as your computer turns on, start pressing F2 simultaneously until it enter the CMOS setup.