Just loaded new software update on my hisense tv purchased today and after it switched itself back on,it won't respond.

SOURCE: tv switches itself on and off no picture

Just had this happen to me. It's caused by a failure of the power supply board. Replacing the power supply should fix this issue.

This appears to be a very comon problem.

http://www.reviewcentre.com/reviews110919.html

Cr1spy.

SOURCE: MY HISENSE TV SWITCHES CHANNEL IT SELF AND

take batteries out of remote control see if it stops

The Knight

• 76851 Answers
• Posted on Jul 09, 2011

SOURCE: on an approximately 19" Hisense

Hello
You must ahve its original remote control to ulock your Hisense TV. If you haven't one, try to gather it from any of your friends or relatives who owns the same model TV; just to unlock it. After unlock, you can use universal remote control to operate it.
To unlock do the following.

[1] Press the "Menu" button on the remote control. The TV menu will appear.

[2] Tap "Channel ^" or "Channel v" to scroll the cursor between the menu options. Select "Function" and press "OK."

[3] Select "Parental Control" and press "OK." Enter the TV's password when prompted.

[4] Choose "Off." The parental controls will switch off and the TV will unlock.

OK.

SOURCE: tv switched itself off and won't come back on

pls describe the type of tv it is ?

Marvin

• 85242 Answers
• Posted on Dec 28, 2011

SOURCE: problems with Hisense F40V87C TV

I would say the switch that turns it on is defective.