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Yamaha PSR-A670 (music keyboard) not starting

Hello

I am P Samuel, from India. 
My contact details: email id: psamuelmerchant at gmail point com
I have one Yamaha Keyboard. It is not working from 4 months. I do the electronic repair but here I am not able to find the fault and I am stucked on the way. 
It was working and one day I on it but never got it on, I tried it again and again but no use.
I check the power circuit and I found transistor faulty and I replaced it but even though not starting. 
Pls help me. 

Regards.
                              

Comments
Kari

Hi Sam,
we have a doc for PSR-S670...
Kari

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amfarina

Hi

I suppose the model is PSRS670. In order to help you, could you indicate the transistor pcb reference you replaced, pls?

regards, Marco (Italy)

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