crwdns2934241:0crwdne2934241:0 rab777hp
crwdns2934249:0crwdne2934249:0:
You can try doing several things, booting from the install disk or an external HD to check if it's the hard drive. Running the Apple Hardware Test to see if it turns anything up, and removing and reseating extended RAM.
crwdns2915684:0crwdne2915684:0:
open