In my history of repairing laptops as a hobby i have found several boards that had either dead pch or ite or.... and after i replaced it i get to the point of having every single voltage except +vcc (core cpu). On cpu PWM CONTROLLER i had +5v, ALL_SYSTEM_PWRGD... every one except svidalert. it would be low in voltage and active. The resistance on vcore was always fine.. but svidalert was on. SVID_CLK AND SVID_DATA are always fine.
According to the datasheets of the controller "SVID ALERT# is pulled low by the controller to alert the CPU of new VR/12/12.5 Status". Can someone explain me what is the meaning of "VR/12/12.5 Status"? What is svid alert checking? is it only cpu or it can be pch? or?
On almost every topic i read regarding subject the conclusion is if you have all voltage but svid alert is low then cpu is dead. But some of them replaced cpu and had exact same problem!?
According to the datasheets of the controller "SVID ALERT# is pulled low by the controller to alert the CPU of new VR/12/12.5 Status". Can someone explain me what is the meaning of "VR/12/12.5 Status"? What is svid alert checking? is it only cpu or it can be pch? or?
On almost every topic i read regarding subject the conclusion is if you have all voltage but svid alert is low then cpu is dead. But some of them replaced cpu and had exact same problem!?
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