No display power going in but screen is blank

"Hello, Sounds like you have a bad monitor, or video cable, replace."

Mine did this after kids played with it, just hold the power/volume button pressed down for a few seconds and it will go back to normal.

GO TO THE BIOS SCREEN AND CHECK IF U HAVE ANY DISPLAY .. U CAN DO IT BY TAPPING F10 DURING START UP ... IF YOU DONT GET ANY DISPLAY .. ITS *********** BOARD GONE BAD

It actually sounds like the batteries are going dead if the 24v from the furnace are not providing the power to the thermostat.

it looks like the Inverter's gone in your screen, it works like a starter in a florescent tube, it 'kick starts' your screen to come on. Turning it on/off many times eventually 'kick starts' your screen and makes it come on eventually.

Please check your CPU ram I thing problem in ram.

Sounds like its simply going into power save mode. Does your screen come back on when you move the mouse or press a key on the keyboard? Is the computer still on? Check your power options in control panel.

The power -inverter board probably needs an overhaul.
I redo many of these.
If the screen was pinkish or flickering before it finally got to this point, it is possible that a bulb has gone bad.
Fran

It appears that the display resolution set in your display properties is out of the range that the LCD can display.

Try this.

Boot to the ENABLE VGA MODE by pressing F8 to get the Windows Boot Menu. If you can get to the desktop, then go to display properties, and see if you can change the resolution to higher settings and maintain video. (If the video blanks out, then it should revert to the previous setting in 15 seconds)

There is just no way you will be happy to hear it needs service or replacement under warranty.

Worldvet