In questo link: http://geeklord.com/2008/01/19/solut...e-4520-laptop/

ho trovato questo

Acer Aspire 4520 does not have bluetooth. It has the button but no device is installed. All the drivers on earth wont make it work. I have no idea why they would put the button there but not the hardware


Qui in italiano: http://www.ciao.it/Acer_Aspire_4920G__1074196

Nella prima opinione (scorrere verso il basso) dice

"Ah....ha il tasto bluetooth MA NON HA IL BLUETOOTH!!!"