toshiba home theater no audio output

[NESTOR VILLANUEVA]

Hello. I had my TOSHIBA HTD-150 E which is I purchased 3 years ago. I never used it for a month and last day I try to used it but in my surprised there is distorted sound coming out there the stop and never had any sound signal output anymore. sometime when I try it again comes a sound just for second and lost . I hope somebody had an Idea what parts ussually failed in this trouble.thanks

 

[Nikolai Petrenko]

certain the IC or transistor in the circuit, it can't cause by passive components, if you have oscilloscope and wave generator you can check the pre amp or power amp stages. but I not sure, can you post some image???

 

[NESTOR VILLANUEVA]

thanks for reply Nikolai glad to hear from you. I find that the 3 amplifier are TDA 7265. I wonder why those 3 amplifier never produce audible sound signal to the speaker. here i attach the picture of circuit board

 

[Nikolai Petrenko]

I am busy now but I suggest you clean the circuit board and use wave generator and oscillator to check the ICs

 

[Nikolai Petrenko]

clean use alcohol or air sprayer if you have, use water is too danger, it can cause you circuit worse

 

[crutschow]

Can you check the power supply voltages?