![]() ![]() Tech guy in the shop said it's a resistor. On whether it's the resistor, a coil or a capacitor. I've done this under the microscope, but good magnifying glass would help. Better just solder new one over the old one. The resistor is glued & soldered, so it would require some scraping with your soldering tip or hot air to actually desolder it, pain in the ass. There are no any other parts in there, so it's really hard to damage anything. I completely removed it, but it is actually not needed (as it is 40ohm or so, and we are planning to solder 3-4ohm, you can just solder new one over the old one). Locate the 0603-size resistor 1cm to the right to the fan connector, under the metal sheet.There is a obvious connector from battery to MB in the center. Disconnect the battery from the motherboard.Some small latches, open the screen and keyboard kicks off. There are 2 types of screws, long and short, mark by any sort of scotch tape the places where were the short ones. You disassemble the laptop (powered off, unplugged).So the steps are (on your risk of course): Overtime it degrades and in my case was 40 Ohm, which is way too much voltage drop to start a 0.5A fan. The power to fan is delivered through a small resistor (UPD: as elektroshadiscovered, it is a permanently failed resettable fuse) at the mainboard. The problem is not in fan itself, fan is OK. There are knocking, high-pitch buzz or similar sounds from fan, faster with temperature rise (this is actually the PWM sound that is trying to spin fan faster, but it can't spin at all). Fan not working, CPU overheating, throttling, turning down unexpectedly. ![]()
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