HOW TO REPAIR LAPTOP CPU FAN CIRCUIT

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

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Laptop Cpu Cooling Fan Not Working.....?

Yes, the fan, if plugged into the headers on the Motherboard, should be spinning. Even PWM controlled fans spin unless you manually disable them.
What kind of Laptop do you have? Usually, there's more than 1 fan header in Desktop Motherboard and You can always plug in the fan into a different fan header on the Motherboard to test the fan. but on Laptop motherboard there is only one header

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CHARGING PROBLEM IN LAPTOP there is a lot of problem facing by user and a chip level technical .one of them is laptop shuts down every time charger plugged in. Charging only works if connected before turning on laptop even A/C adopter is OK.This problem happens because of laptop charging circuit failure and it is not an easy job to diagnose problem on laptop motherboard.This problem happened

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fix Nvidia problem.

most common problem with all laptops which are having BGA NVIDIA graphics chip,given below.. 1) bad display/black2) running vertical/horizontal lines of whole lcd display3) restarting/hanging5) no display(blank)6) external monitor projector display okay but laptop lcd not showing display7) laptop lcd showing display but no external output.Let see how to fix nvidia problem in HP DV2000 laptop..

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Entering Bloging

I am not pro , but i know decent about computer chip level repairing. As, I survive in this industry, every day i repair many computer and laptops at my workplace.Some time i face some problem which are not common/easy ones , when i repaired some problems like these I want like to remember the fix , for next time but i can't remember them all. I feel blogging is a good way to brush up my memory

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