Logitech G5 Laser Mouse repair/replacement parts?

Does anyone happen to know if it is possible to replace/repair any components on the Logitech G5 Laser mouse? I purrchased one "as is" on ebay and it needs to be repaired. The whole thing needs to be checked out but I also cannot find a replacement weight cartridge. Does anyone know where I may be able to find one of these? And if anyone knows of any ways of repairing this mouse I would be grateful if you shared these with me.

So replacing the whole thing would make a little more sense? I may be able to sell the one i just got "as is" on ebay again. But I can't find any brand new that are below 60 dollars. Do you have any suggestions on where to get a brand new one cheap?

You can try to put another good known usb cable to it first if You have one unused lying around. If that does not help then probably not worth doing anything else. Busted cable is the most likely fault as the conductor wires in it tend to brake after long usage due to being bent repeadetly. It normally happens right where the cable goes into mouse. If You do not have another cable You can try to cut original cable shorter.