Recently my dad inherited an iBook G4. The Airport works, but it seems to accept the signal broadcast from only one of the two wireless access points in the house. The two routers are being used to extend the coverage, i.e. iStumbler and Airport Radar show two entries, both with the same ID. My Macbook is fine; I can move from one end of the house to the other and signal remains high. The iBook's signal gets weaker as it moves from the router on that side of the house. Is this a hardware issue (specifcally, the iBook's Airport), or is there a way to specify which access point to use?