Yes.turn power off and on again on the screen

Sounds like you must reinstall Android OS. Try this;
1. Turn tablet off.
2. Turn tablet on.
3. When you see the manufacturer logo, count 2 seconds then press and hold the down Volume key.
4. "Android Recovery" will appear on top of screen if timing is done correctly. Release volume button. if not do step 1,2 and 3 again until "Android Recovery" will apear.
5. Press volume up button, the screen will say "Entering Android recovery mode" then an Android robot graphic will appear alone on the screen. then you may now release the buttons.
6. Hold down power button and then press the volume up key together to see the Android Recovery screen menu selections
7. Using the volume down button, scroll down to "Wipe data/factory reset" then Tap Power hard key
8. Scroll down to select "Yes, delete all user data" then Tap POWER Hard key again.
9. After a few minutes, your phone will return to Android recovery screen menu.
10. Tap the Power button to "Reboot system now" which will power-cycle tablet and eventually power back on to the Initial Set-up / Welcome screen present when you first turned on your tablet.

You can try a Hard reset...

• Turn the phone off, either by holding down the power and selecting turn off, or pulling the battery out and then putting it back in.
• Hold down the Volume UP, Menu, and Power keys until the android recovery screen shows up, then release them.
• Use Volume Down to scroll to wipe data/factory reset, then select it using the Back Arrow Key.
• Scroll down to YES, then select it again using the Back Arrow Key.
• The phone should reset and return to the android recovery screen.
• Use the Back Arrow key to select reboot system now.
• The phone will reboot to the initial welcome screen.

all that matters is the screen,
is the battery out now,
is the screen 100% black, turned on, no text ever?
yes, then press the F10 key at power on, hammer
it, F10 see BIOS screens?
try new power pack
fan spins. blows air, does the cd eject work ,yes and yes.
does an external screen work on the VGA jack
is the back lamps burned out. CCFL
point a flash light at the screen , see data., turned on
there, that is a start.

yes,this is the battery
needs replacement or the power supply unit has lost it's ability to charge the battery.

Hello.

Try removing the battery then replace it back and then try it again. Can you touch other options and is it responding?

Now tv turn on have power LED and OPC LED lights indications flashes together?Yes,this problems,it is the tv Tuner signal board it is causes and the problems.That the board where the incomming broadcasting signal cable plug into it.If turn tv on.No power LED light or any kind LED lights at all.Yes.Than the tv power supply board that the cause and the problems,that the board where the tv power a/c cord plug into it.U have some basic mechanicals skills like take things aparts and putting it back together again?Yes,tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish tv Tuner signal board or tv power supply board for the replacement.

Tv turn itself off after 2-3 seconds the tv still audio voices?Yes,than the tv long board that call the LCD inverter board it is dead.Require change the tv long LCD inverter board,this board help the LCD screen panel to have a backlight to produced a picture or 2-3 seconds tv power died completely no power to tv all?Yes,than this problems the tv power supply board it is dying.That the board where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish long LCD inverter board or the tv power supply board for the replacement.

Yes, you are having problem with your power supply board, you can check your model with shopjimmy.com and maybe google for price

Hello,

Does the system power on, just the screen that fails to lighten? if yes, the problem should be from the screen back light. The back light must have gotten burnt and needs to be replaced for your screen to brighten up again.

Take care.

Yes, I had the same problem and it was the invertor board that controls the lamps .I bet ya that's your problem.Hard to locate parts for these lcd's.If you find a supplier please post.Have fun locating parts. It took me 2 weeks to locate one.