Emerson Model # TC1972DB It shuts off after 30 seconds Of being powered on.
Can anybody help me to identified this problem?

I am assuming that this is a newer set?

If so there are three things that fail most commonly in these sets, and are in no particular order:
1) Contact resistance of the power relay- if it is high, or if the relay coil connections where they are soldered to the foil strip are not sound, bith can cause some problems.
2) "cold" solder joints in the set, mainly around the power supply and the sweep circuits.
3) The "HOT" (Horizontal Output Transistor)- This is the big one on the heat sink. Check it for leakage. If you do not have have a transistor tester, uses a good DMM, or other reliable meter that will allow you to measure up to at least 1 MegOhm, and check across all three connections. Two at a time. A transistor is essentially a pair of diodes with two leads tied together (as a rudimentary explanation, there is far more to transistor theory but as the most basic explanation, this works) Assuming it is a standard "TO-3" case style, the case will be the collector.
With your positive lead for the meter attached to the case, check the Emitter, and Base, with the negative lead- note your resistance values. Now, reverse the leads and repeat the measurements. If you do not have a great amount of difference, across any of the terminals tested at this point- a difference of at least 10:1 to 15:1 or greater, the transistor is breaking down, and is the likely cause of your problem. *Base to Collector resistance values will be lower than the Emitter to collector values, but close to those of Base to Emitter values*. If these(collector to base/collector to emitter/base to collector/emitter to collector) measurements are acceptable, check for Base to Emitter leakage- the same procedure as before, but you are testing just between the Base lead and the Emitter lead. If the results here do not reflect the same level of diference, the transistor is still failing.

: Emerson Model # TC1972DB It shuts off after 30 seconds Of being powered on.
: Can anybody help me to identified this problem?

Hi Alberto, this is difficult, I don't know the TV or its vintage but assuming it's a fairly modern solid state color set, here ar a couple of pointers. It probably has a switching (switc mode) power supply producing about 115 volts B+. These supplies are usually well protected and will turn off when they sense an overload. Secondary voltages for the set are produced by rectifying voltages from the horizontal output transformer. The loss of any of these can stop the set. Sometimes the sets will trip if the picture is extremely bright after a few seconds as the tube warms up and draws excessive current. I'd suggest you measure the B+ line and see if that's stopping. You should be able to identify the power supply from where the mains is applied. If it's a switch mode, the mains is rectified, filtered with a large, several hundred mf at about 200 volt (in the US) capacitor and then is chopped by the swithing circuit. The B+ is rectified after the high frequency switching power transformer (small) and filtered by about a 100mf/160 volt capacitor. If you can identify this you can see if it stops. You should be able to find the Hor. stage and transformer, the lead will take the high voltage to the side of tube from it. There will be several secondary supplies rectified and filtered here. You should be able to pick the filter caps around it and check the voltages aren't failing. I think a static test won't reveal the problem, if it starts it will probably test good when cold. Cracked dry soldered joints are a real possibility, firm but gently tapping on the circuit board (with the butt of a screwdriver) will often show these up. Often you can see a spark where it's making poor connection. I hope this might give you some leads, be careful of high voltage, at least your mains voltage isn't as leathal as our 240 volts. If you have a look at it and then tell us what you,ve found and the type of set we might be able to help further.
Good Luck, Don Black.

: Emerson Model # TC1972DB It shuts off after 30 seconds Of being powered on.
: Can anybody help me to identified this problem?

I have a 1990 Emerson TV Model #tc2551rd
and I need help

The picture really looks good BUT on the screen it has the CHSET in the left corner and the CH # on the right corner on the screen all the time. I do not have the remote for it. I was wondering if there is a way to take this off of the screen. I tried a remote, (70-20910) that is for an Emerson product but not this particular Tv--it didn't work. I also tried all the codes from an universal remote but they wouldn't program this TV