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Unplug it, restart your computer and try it again. Only this time plug it in before you restart the computer. It should detect the new hardware. If that doesn't work, try another USB port. Could be a problem with the internal functions of the mouse also. Good luck
The battery may show "full' but still not hold a charge, so that when you unplug it from your computer, it goes dead. I assume you hold down the power button for several seconds and it still doesn't power up? Most likely, you battery is defective.
Do a reset: Turn the computer and monitor off. Unplug the monitor video cable from the computer and unplug the monitor power cord from the wall outlet. Let it sit for 5 or 10 minutes. Plug everything back in, turn on the monitor, then start the computer. Sometimes that will work.
If you still have the same problem, try to borrow a known to be good monitor from somebody. If it works, then you know your monitor is bad.
It's also possible that your video circuitry is bad. If the monitor plugs straight into the motherboard (onboard video), then you'll need to purchase a video card and install it. Disable the onboard video first.
It's sort of a solution, but I work in a computer shop and got this screen in yesterday. I looked at it closely and it's actually the backlight that died. I pulled it apart and found that three of the 820uF/20V capacitors had swollen up. If you replace them then you should be fine, but I went for a different approach and took the inverter board from a laptop and put the in the screen and used an external power supply. It's a bit dark but it works fine now.