I just got the TV and it turns on for 15 mins and then shuts off

Check your antenna is plugged in the right place.
Switch TV on then goto it's menu setting, if the menu appears then at least you know the screen works.
As a test, plug in a DVD player to one of the HDMI ports and try to play something. Make sure you select the proper input source from the source menu and see if you get a picture.
If you do then it narrows the problem down.
Next, from the menu, select TV source to see if picture comes.
There are a number of other sequences depending on what decoder or Viewer box you have, if it's just Freeview antenna then you may have a problem with that.
Make sure you've done the auto tune procedures too.....

Sounds like you have a parental setting on the tv that is set to only allow 2 hrs then shuts down... try going into the menu and looking for parental settings or sleep settings... if that isn't it try spacing the tv away from the wall to allow circulation... it may be over heating... next would be to get a circuit checker for the wall plug and make sure the polarity is right at the power source... you would be surprised at how many homes are wired bkwards... usually sign of this problem is electronics in your home seem to burn out with in 6 months or sooner... tester has 3 to 4 lights on the bk of it and looks like a wall plug.. costs about 5 $

Assuming it is not hardware but soft settings...
1) Check and make sure that your TV does not have the timer set.
The Timer feature allows you to set a day and time for the TV to turn on automatically and the device and channel to display when it switches on. If the TV is already on at the requested time, the TV automatically tunes to the channel you designated in the Timer menu.
When the Timer turns on the TV, the following message is displayed: "Press a button for the TV to stay on." Press any button on the remote control within five minutes if you wish the TV to remain on.
Note: The TV clock must be set before you can use the
Timer feature (see preceding page to set the clock).
On/Off
Press down arrow / up arrow to enable or disable the Timer.
2) If not working, try SYSTEM RESET. Press SYSTEM RESET button on the front panel with pointed object (e.g. straight paperclip). TV turns off, green LED flashes for about 1 minute. When it stops flashing turn the TV on again. All settings other than Parental Lock need to be set again using the manual.
3) TV RESET. If all else fails for soft error. Your manual describes this last resort for soft type error. It could be hardware problem needing more expertise.
Manual can be viewed on a computer at
http://www.audiolabga.com/pdf/V32-V32L_Service_Manual.pdf

try unplugging the tv from all imputs and power and let set over night then plug everything back in.

prima lv-3228p lcd tv-after 15 mins of play the screen goes funny and there is still volume but the remote will not function. you cannot even shut the unit off, only by disconnecting the power supply. If you wait 15 -20 mins and plug the unit back in it will work for approx 15 mins again- then it will start acting up again?/

Ur tv power supply have dying leaking parts call capacitors.The board where the power a/c cord plug into it.That the power supply board.U know basic electronic's,have the tools and know basic soldering?Searches the power supply board for these dying leaking capacitors and replace them,ur tv will power up normal an last.These dying about to be dead are alway bulges up on tops or puff on it tops.These Capacitors must be replaced.Or tries websites like Shopjimy.com,Ebay.com to buy a whole refurbish power board for the replacement.

it souds like the cooling fans arent working correctly. if the tv is staying on long enough to warm up and then shutting down i would look at the cooling fans

cheak cables what cables uusing ? thx nick

Sounds like a tuner section problem. When you are playing a DVD. You are only using the audio video circuit of the TV. Something like a monitor. But when you go back to TV mode... You are now in the tv tuner circuit. And your problem lays there. I had a mouse **** on my tuner section of my tv and it caused the same problem. Yes mice do ****...