This seems to be a very common situation with the ibook g4... but maybe someone has some advice for me since I cannot log in at all even with my ram problem. Doing the Hardware test i was given this error: ERROR CODE 2MEM/1/4: DIMM1/J31 I have searched this code on google and it turns out to be a problem with my ram. The big problem is that when turning on my ibook, it shows the grey apple screen, loads to the loading screen. This screen loads everything except the last thing, which says "Loading Login Window". From that point on it does not continue. I have tried apple v, apple s, I have tried the apple option p and r. I have tried all the disks. Please, someone let me know if I am stuck and the only option is to go to the genius bar, or if there is something I can do on my own. Thank you!