Panasonic CT-32HX42F Powers down by itself

From a tech site:
Panasonic HDTV, Model CT32HX42F
Problem: Dead, relay clicks, fuses OK
Fix: Replace C501 with high temp,
100uF/35V, and Q551, 2SC5612, HOT
Recommend to use original HOT.
2SC5612LB228.

I can answer your fuse question for you.

A 250V fuse can handle more current than a 120v fuse of the same amperage. There are a lot of factors but basically a 120V fuse rated at 5 amps will blow at 120V, 5 Amps. A 250V fuse rated at 5 Amps will blow at 120V, 7 Amps (Approx.).

A fuse is usually designed to be a catestrophic safety device. usually when the fuse blows, something else in the TV has already broken. So the fuse just stops the power from continuing to do damage to other components or to you.

250V fuses are used in place of 120V fuses in the real world a lot. I woudn't worry so much about that as I would about why it blew it in the first place.

I am experiencing a problem with it turning off immediately after I turn it on. At first I thought it was the fuse because we experienced a problem with it last year. We changed the fuse and it straightened out the problem. 
When it happened again this time, we changed the fuse and that did not help. 
What happens is we press the on button, the red indicator light comes on, we hear a high pitched sound, then the red indicator light turns off. A picture never appears. 
It is as if it is trying to turn on but gets to a point where it will not. I hate to trash it but if it is going to cost too much to fix, I may as well just get a junker TV. 
I know this is happening a lot with this model as I have researched it.
Do you know where I can find the schematic?
Also, I have a question about fuses. My husband changed the first fuse and I would hope he noticed the voltage and amperage. That information is also in the owner's manual. It indicates this model requires a 3.6 amp fuse. What I do not understand is that the TV runs off of 120 voltage but the fuse says it is a 250 voltage fuse and has worked for a year. 
How does a fuse with a 250 voltage differ from a fuse with a 120 on it? Does it mean that it will allow higher voltages to pass into the TV and that the TV is less protected from higher electrical surges if the voltage number is 250 instead of 120?
If you find the URL for the Panasonic TV model # CT 32hx42f, could you please let me know what it is and post it at this URL?
http://www.fixya.com/support/t213100-panasonic_ct_32hx42f_powers_down_itself

Thanks

I am experiencing a problem with it turning off immediately after I turn it on. At first I thought it was the fuse because we experienced a problem with it last year. We changed the fuse and it straightened out the problem. 
When it happened again this time, we changed the fuse and that did not help. 
What happens is we press the on button, the red indicator light comes on, we hear a high pitched sound, then the red indicator light turns off. A picture never appears. 
It is as if it is trying to turn on but gets to a point where it will not. I hate to trash it but if it is going to cost too much to fix, I may as well just get a junker TV. 
I know this is happening a lot with this model as I have researched it.
Do you know where I can find the schematic?
Also, I have a question about fuses. My husband changed the first fuse and I would hope he noticed the voltage and amperage. That information is also in the owner's manual. It indicates this model requires a 3.6 amp fuse. What I do not understand is that the TV runs off of 120 voltage but the fuse says it is a 250 voltage fuse and has worked for a year. 
How does a fuse with a 250 voltage differ from a fuse with a 120 on it? Does it mean that it will allow higher voltages to pass into the TV and that the TV is less protected from higher electrical surges if the voltage number is 250 instead of 120?
If you find the URL for the Panasonic TV model # CT 32hx42f, could you please let me know what it is and post it at this URL?
http://www.fixya.com/support/t213100-panasonic_ct_32hx42f_powers_down_itself

Thanks

It is due to plug or socket loose or sparking in that area. if it is ok then it is due to some component failure in power supply of tv. as per schematic is concern please go to. www.serviceinfo.com go in search & give model no.it is freely available.