From the info you have given, your player is probably running a few degrees hotter than usual. This causes the fan to spin at a faster than usual speed causing that noise. It can happen if you keep your player in an enclosed space blocking the heat vents from dispersing the heat. Make sure that you place it in a location where it can disperse heat more easily. This will hopefully resolve the issue.
Answers & Comments
From the info you have given, your player is probably running a few degrees hotter than usual. This causes the fan to spin at a faster than usual speed causing that noise. It can happen if you keep your player in an enclosed space blocking the heat vents from dispersing the heat. Make sure that you place it in a location where it can disperse heat more easily. This will hopefully resolve the issue.