Technical Support Macbook Pro 2011 fan spinning and stop

[daengrani]

Halo macbook pro 2011 (820-2936) fan is spin and than stop than spin again and stop.
PM_SLP_S4_L sometimes missing voltage
SYSCLK_CLK32K_RTC is good

what is problem?

 

[Ahmad Safari]

Hello
There may be a problem with the BIOS. Program and test the BIOS.
Voltage the Mainboard The voltage on the Mainboard may have a problem and be the cause of this failure.