Over heating i turn the tv on and it works for about 15 mins then it shuts off, it will turn back on after cooling off. the tv will stay on with just half screen working and a fan blowing on it.

The oven is probably overheating and shutting itself off to prevent damage/fire. If the cooling fan isn't running. Check/replace the thermostat that switches the cooling fan on.

Quite possibly one of the heat sinks has come loose or a power supply cooling fan has failed.
Have you tried blowing it out using canned air?

Have same problem. Not the proper fix though I found that taking the back off and heating it up with a heat gun for 30 seconds to 1 minute and tv works fine till you shut it off over night.Maybe someone can offer a solution with that in mind. Pretty strange

There is a high possibility that the components over a period of heating and cooling, tend to bring on a problem of dry soldering. So my advice is to check the set for some loose joints that have played on to give you these erratic shut downs or poor performance.The best way to check for loose connections is to tap lightly when the set is powered on , If there is change while tapping then it seems that there are DRY solder joints. Remove main plug, the covers - with caution of high voltage, check for dry joints, use a good soldering iron to solder all suspected points.Sometimes the fault occurs when the set warms up, if so you can simulate the heat using a hair dryer on the suspected areas, try with the power supply, distribution, Processor controller, driver controllers on the A/V related sections. Also the use a FREEZE-IT spray can simulate the components to cool and show up the fault.

It sounds like you have a bad capacitor. When one is faulty, they will demonstrate this type of behavior. The issue is finding out which one. If you are not a skilled technician, this is a difficult task. I would recommend that you take it to a TV repair shop, and let them repair it, if you are unable to. The good thing is that the cost of a repair is significantly less expensive than a new TV.

Seems like it is overheating. Try cooling it down by using a fan to blow air into it (temporary fix). Make sure the TV is well ventilated and heat can escape (permanent solution).

Yes. It is definately something Heating and cooling.

It may simply be a loose connection, but it may be a failed component.

Service is required

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

Could be loose connections on the board where the solder is expanding as it heats up causing a loose connection or something in the power supply or horizontal is over heating and your tv is going into shutdown protection . Good luck