Attila Orosz,   Try going into the next room and see if the signal is lost. If so, I suspect the antenna wire may have come loose. Instructions can be found HERE.       Rick
Hello! First of all, thanks for reading my post. I've just bought my brand new Dell Vostro 1015 Laptop. My problem is where I have excellent wifi signal with my other laptop, the dell laptop recieves only good or low signal, sometimes it can't even connect. I have Windows 7 Ultimate 32 bit OS, Dell Wireless 1702 802.11b/g/n adapter with the latest driver installed. I've tried several things to boost the recieved signal, for example edited the energy management, without success. My router is only 3 meters away, but I have only 2-3 bar of wifi signal.   Thanks for your help, Attila Orosz
Weak wifi signal