I have received a SONY HCD GTR33 sound system which, when it stops working for several days, connects to the AC line, it gives power and the equipment works OK audio OK all the functions OK the problem is that turning it off is in standby and it does not turn on again, not even disconnecting and reconnecting, only the red standby LED remains on and it does not come on again, it must be left several days to work. Proceed as follows to isolate the line of protection but nothing I still with the problem discard the stk because when the equipment works the speakers work ok medil the line of ever 10v and 12 vol appear. I measured voltages on pushbuttons and I find 3.3 vol. To those who can help me, to guide with respect to this fault I am very grateful.

I ask a question, they shake my hand xfa I have a modular sony HCD-GNX88 but the fault is in the audio of the speakers and headphones does not give any more audio however it works well the problem is that everything works I turn it on and turn it on and put the audio in both speakers and headphones I put it in aux / video and it still sounds if I put it on cassette the same and audio I put it on tv / game and oh audio but I change it to cd and stop verifying audio simply everything works, it is seen on the display that is playing the song and the LEDs indicate that it is playing the song but there is no audio in the speakers or in the headphone jack I change it to radio and nothing changed it to cassette and nothing to aux and nothing and so mind I turn it off and on again and nothing the same there is no audio where I put it I turn it off and wait a while later I turn it on again and there is audio in the tuner aux cassette tv but when switching to cd the nightmare returns no audio that could be