My Hisense tv screen went totally black in the middle of a program and now it won't turn on at all.

SOURCE: hisense television

if you contact hisense all they can say is "send email, send email. there is no support from them at all. this is what i have found. TURN THE TV OFF BY THE SET ITSELF NOT BY THE REMOTE, THEN UNPLUG THE TV AND LEAVE IT OFF FOR 30-40 MINUTES OR BETTER YET OVERNIGHT. THIS WILL RESET THE TV. HOPE THIS HELPS

SOURCE: Hisense tv turns on and off

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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electronic & computer repair& servicre

• 12061 Answers
• Posted on Jun 01, 2010

SOURCE: TV pictures can't come out

www.rolsen.ru/content/tech/PDH4239EU_service_manual%20V1.0.pdf
www.rolsen.ru/.../PDP32XX%20Service%20Manual%200804301.pdf
use these service and repair manuals, to troubleshooting procedures.

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SOURCE: need IR code for Hisense 32" LCD tv to program

Are you referring to the iPhone/iPad app? if yes then this is not a remote app, it's a management app made for Comcast boxes and nothing else it doesn't controls tv's.
If you are referring to the actual remote for one of the Comcast boxes then it all depends on what model of remote you have and the exact model of your tv - some will support it thru the use of a Daewoo or Samsung code, others don't.
So you have 2 options:
1 - you try every Daewoo and Samsung code you have in the manual and if that fails you do a code scan on the remote as explained in the manual:
Turn on your TV
Press the TV button on the top of the remote, then press and hold Setup until the TV light blinks twice
Enter 9-9-1 and the TV button will blink twice
Press and release 1 and the TV button will blink twice
Point the remote at the TV, press and release the Power button, then press the CH+ button multiple times until the TV turns off
Press Setup once to lock in the code and the TV button will blink twice
If even that fails - the tv doesn't shuts down - then the remote is incompatible to the tv so
2 - you get a remote that is compatible with both. The only one i could find is
http://www.logitech.com/en-us/remotes/universal-remotes/devices/6812

SOURCE: My hisense 50 inch lcd tv has picture but no sound.

If you still have back light, then the T-con is probably defective. If you don't have back light, then you either have a bad power board/inverter or a defective panel