Power is on but the screen will not turn on - ViewSonic N3251w 32 in. LCD HDTV

Sustain board fault. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/

Here are two things to try:
I- Using the Power button:
1 Press and hold the Power button for at least 4 seconds.
2 Swipe-down the shutdown confirmation screen to the bottom
edge of the display to turn off the tablet.
Using Charms:
1 Swipe-in from the right edge of the display to access Charms.
2 Touch Settings
Turning Off the Screen
Using the Power button:
Press the Power button to turn off the screen.
Using Charms:
1 Swipe-in from the right edge of the display to access Charms.
2 Touch Settings
NOTE: If your tablet is in a standby state (tablet is on, but screen is off), press the Power button or Windows button once to turn on the screen.
12
'
Setting Up Your Tablet
? Power
? Shut down to turn off the tablet.

II- Unplug the battery, wait 30 seconds, then install the battery again.

STOP!

The unit has a fault on its power board and sustain board.
It turns off because the sensor is preventing some component from bacoming overheated and catching fire or damaging further components. Seel professional repair.

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There is a power switch on both units. The second screen will get power if the power switch is turned off on the main unit.

Hi,

Error: TURN THE POWER OFF AND ON AGAIN is displayed on the LCD screen when the Lens Mechanism is stuck or when affected by any malfunction. If turning the power on and off again does not resolve the error message, try doing a power reset and Initialize option.

Performing a manual power reset

Turn off the camera.

Remove the battery pack.

Press and hold the power button for 30 seconds.

Allow the camera to remain without power for 60 seconds.

Reinsert the battery pack.

Turn on the camera.

To reset the Camera back to factory default, press the RESET button located above the PHOTO button which will change all settings back to factory default. The images and videos will not get deleted.

If the issue persists, service may be required.

Thanks for contacting FixYa

Are your power down specs in need of altering

Power icon/or Display

have to replace the inverter on lcd

Black screen is probably a screen saver or the screen is turned off by power management software.
Check your screensaver setting. Change the screensaver to None to disable screensaver.
I assume you are using Windows XP.
If the LCD is turned off by power management, on the same screen with screen saver, on the lower part of the box there is a Power button. Click to open Power Options Properties. Set your monitor power properties there.
When the screen go blank and you have to push power button, probably the computer is set to go to stand by mode after some idle minutes. You can also set it here in system standby setting.
Regards, 
Dapid Candra

When holding the power button, to turn on the device, the screen pixelates dark and then goes blank. If I continue to hold the power button the screen will continue to pixelate dark and then go blank. In the end, the device still will not turn on.