If you have a working fan and it is properly connected with laptop motherboard and by bad luck it's not spinning as usual.
First of all try to update laptop BIOS and if still nothing fixed then come down to CHIP LEVEL treatment of laptop. Now only two thing you can do to make laptop again working.
1.Check +voltage and senser track from fan connector, find out the CPU fan PWM controller circuit, cpu fan supply comes from output section of fan PWM circuit and this circuit not a smmiliar kind for all laptops and notebooks basically +5 voltage required on Vcc pin to spinning fan and to find out Vcc pin of CPU fan read my previous post no CPU COOLING FAN NOT WORKING
First of all try to update laptop BIOS and if still nothing fixed then come down to CHIP LEVEL treatment of laptop. Now only two thing you can do to make laptop again working.
1.Check +voltage and senser track from fan connector, find out the CPU fan PWM controller circuit, cpu fan supply comes from output section of fan PWM circuit and this circuit not a smmiliar kind for all laptops and notebooks basically +5 voltage required on Vcc pin to spinning fan and to find out Vcc pin of CPU fan read my previous post no CPU COOLING FAN NOT WORKING
check cpu fan controller circuit and it's all fusible resistor or small coil in circuit with a simple OME meter or continuity meter coil and fuse should be show zero continuity on there surface and if no continuity , found open component then you can bypass them using a unshielded Cooper wire.sure it will work again if other things are OK
and unfortunately no any coil and fuse you found on fan controller section then just resold this section using hot air-gun and check other components of fan PWM circuit if possible at your own way :)
2.now you try all you best and still have same problem then now a good news for you because we can power up laptop notebook cpu fan Directly without using PWM controller circuit..
just found out the +5v track on motherboard nearby fan supply track ,connect the fan Vcc pin with +5v track using shielded thin wire jumper on motherboard and some time you can make your fan alive as just remove only the sence pin of fan from it's connector if + five volt is already coming on the power pin of fan.
..now your fan will start working but it will start spinning in a same speed non stop till the laptop is on. but doing this thing please confirm that which supply given to fan directly by jumper that will be generated after you turned on laptop.
have a good luck :)
thnx
ReplyDeleteI think I'm having this issue with my acer laptop.. the first fan stopped working so I got a new one and that one isnt working either... my laptop has always had an issue with heat so maybe the solder came undone. Im wondering how I can fix this.
ReplyDeleteJP' why u wondering ?
ReplyDeletecan u provide here some information about your laptop fan, number of wire and there colors?
Hi, thanks for the information. Maybe you can Help me?, I have an Acer Aspire 5334 Laptop, it shut down when the temperature is in 90C, (I check it with SpeedFan software), I have to wait about 30 seconds to start again, then I run again the fan ii´s working, then shut down. I make a hard process wth the laptop, for example editin a video, checking the temperature is going up, the fan starts, but the temperature is going up 70´s , 80´s degree, and 90, shut down.
ReplyDeleteI use speedfan software, maybe I can increse the fan speed, but Its blocked by Acer (do not change the speed).
I think maybe its the fan, but its working. How I check if its working well?, I have to change the fan?, The circuit that increase the speed its not working good?, What can I do?.
Can you help me and explain how do it, please.
Thanks, my email is vigoma2026@gmail.com,
@ecommerce.vgm
ReplyDeleteif fan is working normally then clean up the heat-sink vent.
if you could include some picture is really much better.. thanks you
ReplyDelete