Any chance of hard disk? The laptop is booting and working.. After few minutes and sometimes few seconds, this sound is coming continuously.
Probably the fan. Take the back off and see if it's clogged up with fluff. You might need to clean inside. Blown air or a soft brush can be used to get dust and fluff out.
The fan is damaged or something
Any chance of hard disk? The laptop is booting and working.. After few minutes and sometimes few seconds, this sound is coming continuously.
Nah the hard drive would wind up and down
Probably the fan. Take the back off and see if it's clogged up with fluff. You might need to clean inside. Blown air or a soft brush can be used to get dust and fluff out.