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Lenovo b560.power on.but no display.
Ram, gmch,processor vcore not ok. I chaing ram ic ,gmch ic , vcore ic.but same. Then chaing bios but same.

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change io ..

You did measurements (signals/voltages) or only changing IC one by one ?

Y SIR CHECK SLP 3/SLP4/AND RUN VOLTAGE IF IO NOT SEND TO CORE OR ANY OTHER IC....SUS VOLT /RUN VOTL CNOT COME ON COIL BY ICS