Hello all, I have some issues with my PowerBook that I was wondering if people could diagnose. I'm worried that the machine is on the way out and that the logic board is dying, but I'm unsure. First of all, I can't put the PB to sleep. After shutting off for about a second, it reboots and turns back on, before putting itself to sleep for another second and rebooting. It's a recurring cycle. This happens when I shut the lid to make it sleep. When I use the sleep function with the PB open, it sleeps for a second, reboots then stays booted until I click sleep again. Another strange issue is that I can't get iTunes to open. It's the only app which can't open; it tries, then I get the spinning beach ball and a "quit unexpectedly" error show up. Another issue is relating to my USB WiFi card. Whenever I open the app for it, in order to connect to the internet, it says "Connected" for a few seconds before it kernel panics. I had a similar issue with the AirPort Express slot causing recurring kernel panics upon booting, and had to remove it entirely for it to stop. I also can't boot the PB into safe mode. When I do it gets stuck on the Apple logo when booting, with the grey spinning circle underneath it. Everything else on this machine is working fine. Is my PB on its way out, or are these problems fixable? I've ran memtest, repaired disk permissions, reset PRAM etc and I'm not getting any errors. The only thing I haven't done is run the Apple Hardware Test because I don't have the boot CDs. All of the ports still work fine. Any help would be appreciated, thank you.