The fan noise on my 5687 is substantially less than my former set (HLN4365W). I never hear it when the set is on, and only notice it if listen specifically for it after turning the set off. It never calls attention to itself. I have heard of some having noisier than usual fans on the HL-S models, but it seems to be a few isolated incidents.

Jack

"People generally quarrel because they cannot argue." - G. K. Chesterton