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Yamaha Ydp-142 no power

hello ! i have Yamaha digital piano ydp-142 that not working . I can see when I’m pushing on the power button the red light on (i think stand-by light indecetor) , on the front - bottom of the piano, while its connect to the power, but no light on the led section and no sound .

I bought replacement original power board and it’s still the same, I’m afraid that the main motherboard that die.. I have original power supply model 130a and on the piano they say that I need the 150 model, that 12v, 1.5a. I have here some power supply that 12v, 2a, but the reaction from the piano is the same. I test all the power supplies with multimeter and ask of them song correct values. So before I’m spending more money on replacement parts, maybe you know that issue ??

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Any voltage getting to the main circuit board? Have you check for all fuses in the unit? Continuity of wires (if applicable) leading from power supply to main circuit board? Checked for cold or cracked solder joints? Close visual inspection of components that have malfunctioned (bulging capacitors, destroyed diodes, transistors etc)? Loose components especially at solder joints? Have access to an oscilloscope, digital signal tracer, audio signal tracer to verify signal conditions?

Might want to check out Youtube and/or

https://old.reddit.com/r/diyaudio/

https://old.reddit.com/r/audiorepair/

https://old.reddit.com/r/diysound/

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thank you for the comment!

so -

Any voltage getting to the main circuit board? - yes , there is a voltage , but I dont know if it's lower than what the main board need to get .

Have you check for all fuses in the unit? no fuses in this product.

Continuity of wires (if applicable) leading from power supply to main circuit board? - yes I track all of them and they look just fine .

Checked for cold or cracked solder joints? - also look fine

Loose components especially at solder joints? - everything look right in the places they need to be .

Have access to an oscilloscope, digital signal tracer, audio signal tracer to verify signal conditions? - I have only multi meter here , there is something that I can with him ?

Might want to check out Youtube - ill love to get suggest about specific YouTube link about that ,

and that for the links! ill check them out!

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