This happened when i open edge browser, when i opening it the fan noise is become louder and louder. I thought it was just maybe the cpu temperature is high, but when i restart it the fan speed and noise is stuck at high level, anyone can help me about it? Oh btw i even try to change power mode to battery saver, try other software out there, but it still can't fix it
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Hi @arita66621
How did you verify that the CPU temp is OK?
It could be a dusty fan, that the CPU's thermal paste needs refreshing or perhaps a faulty fan temperature sensor.
Here's the maintenance and service guide for the laptop that may help. Go to p.67 to see the procedure to remove heat sink from the systemboard. This will allow you to check if the thermal paste on the CPU is cracked and dried out and needs refreshing. Also since the fan is being removed during the procedure, clean the fan of any dust etc while it is out.
Here's the ifixit Cómo aplicar pasta térmica guide that shows what to do.
If refreshing the thermal paste (if necessary) and cleaning the fan, doesn't resolve the problem do you have a DMM (digital multimeter) and know how to use it?
If so, with the laptop turned off and the charger disconnected, remove the battery from the laptop and then open the laptop again and disconnect the fan from the motherboard.
Once you have disconnected the fan use the meter and check what the resistance measurement is when measuring between the white wire and the black wire on the fan connector plug.
I think it should be the white wire but also measure between the blue wire and the black wire just in case.
On 4 wire fans there are two wires used for power (red and black), another wire (usually white) that it connected to a thermistor in the fan (for fan air temperature) and the other wire (usually blue) that is for pwm control (power control method) or there's a speed sensor (rpm) attached to it in the fan.
The these two wires help regulate the fan speed under control of the motherboard's I/O chipset which knows the temperature as indicated by the resistance value on the thermistor wire and speed if a speed sensor is connected or it controls the power to the fan motor if it is the pwm wire i.e. speed controlled.
If the temperature indicated by the thermistor is too high then the I/O chipset alters the voltage on the pwm wire to increase the fan speed to reduce the temp back to within set parameters.(or decrease once temp is OK).
If you haven't got a DMM then try replacing the fan and check if that resolves the problem. Search for 702859-001 to find suppliers that suit you best.
If still no good, then there's a motherboard problem which would need to be investigated further
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Hi @arita66621
What is the full model number of the laptop as shown on the product information label on the bottom of the laptop?
Does it only happen when opening Edge or other apps as well?
- de jayeff
I can't find it on the bottom, it's old model. The full name of laptop is folio 9470m. And no it's not only happen when opening edge, it's happen when it get turn on and always like that until get turn off again
- de Ari Ta