Lenovo Ideapad 1 runs at only 400 mhz LA-L502P

[ruletero]

Hi everyone

I have a Lenovo ideapad 1 15AMN7 with ryzen 3 7000 series processor.

I changed kbc (KB9052QE) and charger IC (BQ247800) due they were in faulty, reprogrammed kbc and it turns on fine, but processor run at only 400 mhz all the time.

I tried to change bios settings, installed all the drivers, using programs to change cpu settings but nothing works, I don´t know what to check.

Please you help

[mon2]

Carefully measure the voltage to ground of PROCHOT# (pin 10) on BQ247800.

[ruletero]

Carefully measure the voltage to ground of PROCHOT# (pin 10) on BQ247800.

hi mon2

it has 0.15 v

[mon2]

That is a logic '0' = Low and this signal is active LOW. This means that the processor is deemed to be 'too hot' so this signal is being pulled down to the logic low level to alert everyone on the board. Respectively, this includes to slow down the CPU.

Review your thermal sensors.

Here is a general case study (found through a quick internet search) on this topic:

https://www.reddit.com/r/overclockin...ng_bd_prochot/

[ruletero]

That is a logic '0' = Low and this signal is active LOW. This means that the processor is deemed to be 'too hot' so this signal is being pulled down to the logic low level to alert everyone on the board. Respectively, this includes to slow down the CPU.

Review your thermal sensors.

Here is a general case study (found through a quick internet search) on this topic:

https://www.reddit.com/r/overclockin...ng_bd_prochot/

Ok, i will review it.

thanks so much mon2!