The tv keeps turning itself off. The red light is blinking after the tv turns off

It could be the conection ribbon between the T com and main board remove carefully clean and replace ,it should do the trick if still the same then most likely T -com

Unplug the tv from all devices and unplug from the wall power source. After about 15 minutes, plug ONLY the power cord back in and see if it turns on. If not, than you will need to do a factory reset. With the tv pluged into ONLY the wall outlet ( no cable, DVD or internet connection) Hold the UP arrow on the remote than press and release the POWER button on the tv. This will reset everything and the blinking red light should stop. At this point you should be able to turn the TV on and off.
IF for some reason this does not fix your issue, visit HTTP://esupport.sony.com
Good luck.
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unplug it from power source completely 15 minutes then plug back in with NOTHING plugged into any of the ports. If it boots back up then does it again later it make be something plugged into a port causing power to back feed into the boards. I had this same issue on my plasma last year ended up being the xbox360. After this if it still wont power then your power board maybe bad.

this is what I've done to our tv, same problem so I solved it by doing ths : first turn on your tv then let it keep on blinking then directly unplug the tv don't turn off the tv . plug again the tv then you'll see that second red light is not blinking but still it still red light the first one, just unplug it again by not turning off the tv then while unplug click the on off button to off the tv the plug again the tv and turn it on. and finally the red light will turn to green it means the tv is now ok! yehey. sorry for my english I'm notgood speaking english :)

You can try unplugging it for a while and then plugging it back in, but according to the manual, the standby LED:
Lights up red when your TV is in PC power saving mode. If the LED blinks in red continuously, this may indicate the TV needs servicing.
(Operating Instructions, Page 22)

The tv power supply board is is problems and the causes.That the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Tries unplug,replug the tv back like an hour later.The tv now,should resetting itself back to the factory setting.The tv should work now.Not,than the tv power supply board have problems,not giving the tv it wright voltages anymore.The tv power supply board that the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Likely to be the STK convergence chips causing a protection circuit to switch the TV off. Have you got any onscreen convergence problems (i.e, colour fringes)?

I checked Toshiba's website and found the manual for the set. The self restarting was indicitive of a lamp failure. The red light was solid while the green light blinked. It would then restart 8 times before both lights would then begin blinking.