TV Sharp LC-49CFE6242E - not working

[betmen]

Hello,
I get one old TV, Sharp LC-49CFE6242E which is not working.
When turning on the TV, the inscription SHARP is displayed on the screen and after a few seconds the TV turns off.
So far I haven't found what voltages should be at the output of the power supply and I haven't made any measurements.
If anyone has any ideas, please let me know.

[betmen]

Here are some pics...

[betmen]

I managed to get this TV working, there were several defective capacitors in the power supply.
Now another problem is happening, when working it happens that the sound is interrupted. Most of the time it works ok, but it happens that there is no sound for a few seconds or a few tens of seconds...
What could it be?