Is there any way to boost the signal to an old PowerBook G4's wireless card? It's been getting steadily weaker and weaker. It can still pick up wireless sometimes, but most of the time it can barely hold the signal. Is there any way to boost it so we don't have to replace it? (Is it even possible to find replacements any more?)
You do have options ...
Either of the last two paths will require opening up the PowerBook (and possibly the first, to avoid conflict). Check out iFixit for detailed instructions. (example - Installing PowerBook G4 Titanium DVI Airport Card)