How to repair Hisense tv 32 the tv keeps going on then off

SOURCE: LHD3204US 32 in. HDTV LCD Television: I can't get any power to my 32" Hisense TV model n...

Have your checked or replaced the fuse in the plug?

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