- Unplug laptop from charger
- Hold PWR button for 10 seconds
- While still holding the PWR button, plug in charger and KEEP HOLDING PWR button
- After 10 seconds of holding the PWR button with the charger plugged in, LET GO of the PWR button and then IMMEDIATELY (within 1 second) press the PWR button again as normally.
Follow the above steps exactly. Your laptop should power on with the fan spinning full-blast. If it continues to boot and function properly, your temperature sensor on the CPU has been damaged and is preventing the computer from functioning properly. The process above bypasses that sensor and allows you to test the rest of the computer. Unfortunately, if the sensor is bad, there is no real way to fix it. However, if the above process works, you can continue to use the computer in that condition until it dies from something else. You will have to live with the fan being on 100% of the time, but will at least have a working computer. Good luck!