Lenovo 500-15isk
LA-C851P
i measured all voltage, only cpu dont work
there is NCP81208 chip for three rail voltage :
VCC_core VCC_GT and VCC_sa
only one of three voltage working .ist 1volt
two voltage ist null . i replaced 81208 chip ,but dont change. also i chnaged two NCP81253 together, one have voltage another ist null. also dont change
So i think 81208 and 81253 not defect and problem ist another place.
i can see three pin Communication (SOC_SVID_CLK ,SOC_SVID_DAT,SOC_SVID_ALERT) that connected direct to cpu .
any person have idea for my problem ?
How one of three voltage rail working , because all enable pin ist same but with seperate PWM ?
i dont found datasheet for 81208 but i thinks ist similar NCP81243
LA-C851P
i measured all voltage, only cpu dont work
there is NCP81208 chip for three rail voltage :
VCC_core VCC_GT and VCC_sa
only one of three voltage working .ist 1volt
two voltage ist null . i replaced 81208 chip ,but dont change. also i chnaged two NCP81253 together, one have voltage another ist null. also dont change
So i think 81208 and 81253 not defect and problem ist another place.
i can see three pin Communication (SOC_SVID_CLK ,SOC_SVID_DAT,SOC_SVID_ALERT) that connected direct to cpu .
any person have idea for my problem ?
How one of three voltage rail working , because all enable pin ist same but with seperate PWM ?
i dont found datasheet for 81208 but i thinks ist similar NCP81243
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