After turning on something appears in the diaplay and goes out, I disconnect the two ICs stk410-030k and stk411-230k and the device remains on, my doubt is that I have no information on either ICs, thanks in advance for your help .

I didn't find anything, I suggest you ask in the audio forum, this is tv Successes

without the integrated ones, check that their respective supply voltage reaches each integrated. of + 65v and - 65v + 37v and -37v using the diagram they have left. If the voltages are present you will have to test which of the 2 integrated ones is damaged, put one and check if the amplifier turns on with sound, if it does not turn on remove it and do the same test with the other. the two integrated ones are rarely damaged, but the failure of one is sufficient to activate the protection by switching on the amplifier.