If your computer won’t boot but fans spin continuously, it indicates a problem that needs to be resolved as soon as possible.
There are three main reasons why your computer won’t boot but fans spin:
Poor power supply
When the power supply to your computer fails, then it won’t start or power up, but the fans spin regardless.
Similarly, when your computer won’t boot but fans spin constantly, it could be a sign of high temperatures or overheating in your computer, which if not dealt with, can cause your computer to fail or refuse to boot until it cools down.
When your computer’s components are faulty or are damaged, they can prevent your machine from booting. Such components include RAM chips, motherboard, and even the BIOS.
Solution 1: Disconnect external hardware
This involves unplugging or disconnecting any external hardware such as printers, USB drives, scanners, among others so that you leave only the basic components before trying again. Of course, we suggest unplugging the power cord and removing, primarily, all external peripherals and then moving to the internal hardware.
Solution 2: Reset RAM chips
One of the reasons your computer won’t boot but the fans spin could be a bad RAM. In this case, remove the RAM from its slot, then clean it and return it back to the same slot or try a different slot altogether. The best way to clear ram is with a cloth and gently. Don’t apply any liquid. You can also try switching positions of the RAM cards to different sockets.
Solution 3: Check the motherboard
If you see a yellow or amber light on, it could indicate a bad motherboard. Sometimes the motherboard could have bad capacitors, which may cause the computer not to boot but the fans spin. If this is the case, you can have a new one installed on your computer.
Solution 4: Change the power outlet
If you open your computer, remove all connected devices and expansion cards, then turned it on again and it still won’t boot but the fans spin, then you’re probably looking at an issue of power supply. Try a different power outlet.
Solution 5: Check with your computer manufacturer
If your computer won’t boot but fans spin, you can also note down the sequence of the beeps or flashing lights your computer shows while trying to boot, then check with your computer’s manufacturer what the sequence means.
Solution 6: Check the peripherals
If your computer won’t boot, but the fans spin, and you hear a beep sound as if it is booting, then one of your peripherals could be causing the problem.