greetings to all the followers of me I repair a panasonic panasonic sa-akx78 team arrived to my tyaller with the fault that it does not turn on. When giving power, only the 2 fans that it has rotate, but the display does not light up, take measurements and the power order arrives, the 38volts of the source card come out to that of the integrated amplifiers that in this case are 4 but at the moment those voltages fall If someone knows how to deal with this failure, their contribution will be welcome.

in which area are these diodes located

Greetings, colleague, thank you for your input. The question is why can this diode be replaced and if something else needs to be changed?

On what other board can I get those diodes. In order to replace them ..