My right fan (fan below the Num Pad) started to make a crackling sound but only after a gaming session with full speed. After that when it becomes calmer the sound appears and is like if it is hitting something.
I already visually investigated by opening the bottom cover but didn´t find anything suspect and it seems spinning normally.
When it´s producing the sound, if I lift its side a little bit 40-60º angle it stops, but when I put back flat it automatically starts to do it.
Any ideas on what is causing this issue?