My son's iBook OS X 10.3.5 with wireless internet via linksys, just up and quit connecting to internet. When we connect it with internet cable from working computer, still no connection. I don't have any idea what to look for since we are new to apple. I know these ibooks are old, we purchased them cheap from local school district, his 'puter froze within 3 days, so I took it to an authorized apple repair shop and they reloaded the OS. Brought it home, it worked fine for about 5 days, then no internet. Any suggestions short of trashing the thing?