My Toshiba model# MW27FP1 worked fine a couple days age. Now, when the unit's power button is pressed, the TV turns on temporarily (I can hear the static charge building in the tube) and then turns off without any light appearing on the screen...

Did you switch video inputs from the remote, each input has its own menu item.

Your best bet is to reset the System Management Controller;
(I'm not sure if your model has a removable battery or not, so I'm providing both methods)

Resetting the SMC on Mac portables with a battery you can remove
Note: Learn about removing the battery on MacBook and MacBook Pro.

1. Shut down the computer.
2. Disconnect the MagSafe power adapter from the computer, if it's connected.
3. Remove the battery.
4. Press and hold the power button for 5 seconds.
5. Release the power button.
6. Reconnect the battery and MagSafe power adapter.
7. Press the power button to turn on the computer.

Resetting the SMC on portables with a battery you should not remove on your own
Note: Portable computers that have a battery you should not remove on your own include MacBook Pro (Early 2009) and later, all models of MacBook Air, and MacBook (Late 2009).

1. Shut down the computer.
2. Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
3. On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
4. Release all the keys and the power button at the same time.
5. Press the power button to turn on the computer.
   Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.

...and then reset the Parameter RAM:

1. Shut down the computer.
2. Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
3. Turn on the computer.
4. Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
5. Hold the keys down until the computer restarts and you hear the startup sound for the second time.
6. Release the keys.

It seams to be a problem in video and video out put stage some TV set design there is no video signal the sound out put also not working this TV high voltage ( horizontal out ) is working fine that why flash squre visible when the sw off. may be dry joints in the video section or some auxilary power supply cricuit feeding power to video section having a problem

There is power supply fault inside the TV. it could be any fault up to the E H T circuit. That is the reason the S M P S is shutting down the moment the TV is switched ON.

Do not attempt to repeat. Rectify the fault.

thats the VERTICAL OUTPUT IC or TRANSITOR that went bad , need to take unit to a TV repair shop , hope it helps AJ

Ur high voltage is dead,FBT,the flyback transformer is dead,the block of plastic with a red wire with a cap hook to a CRT(tv tube).

when you press ON button try to press the eject button of the cd-rom drive. last night we have the same problem.

See if one of the button switches is collapsed, check the "shoulder buttons" also. If any switch is collapsed, it will sense that button as being held down all the time, and may act strangely, including ignoring commands from other inputs or controls. Its possible a bad touch screen could do something similar as well.
Check that all the switches still click and return as they should. If you disassemble unit, you can eliminate the touch screen temporarily by just unplugging the very small ribbon cable to the touch portion of the screen, then see if it still acts up.

This unit is known for bad relay contacts. It may be that tapping in-on-or around the relay at Sr41 might restore the pic temporarily. If so, replace it - p/n#23146558.. If not, you may have some poor solder joints that will take a little bit more investigating and possibly shop time if you're not up to the task.

I had the same red blinking led problem on my Toshiba Theaterview tv. I resolved by:
- Unplugging the tv.
- Press several times (3 or 4 times) the tv Power button.
- Plug the tv back in and press the Power button once to turn the tv on....tv worked!!!

I've had the problem before and tried unplugging the tv for a couple of days and that had also worked, but I this recent solution seems to be faster.
Good luck!
Erick