Its a 15" Powerbook G4, Mac OSX Version 10.4.11 Processor 1.6 GHz PowerPC G4 Memory 1.5 GB DDR2 SDRAM Hard Disk capacity 120 GB Combo Drive. ---------------------------------------- One day after work ( recently ) I came home and tried turning it on but it wouldn't. The green power light was flickering. I unplugged it and took the battery out of it and left it that way for a few hours but that didn't help. last thing I tried was put the battery in it and connect the power, turn it on and immediately took the battery out and for some reason it works perfect with no problems whatsoever! If I put the battery back inside the laptop and keep it in, it would work normal for a few minutes but then the flickering would start again. I looked up a few problems online but couldn't find one that matched the exact one this one has. I don't know much about Mac yet, but according to what I had read that it could either be the battery or the logical board. The reason I'm getting rid of it is because I don't want to start working on a huge project with the power cord always connected with no battery and go through any power failure at home or power surge and lose any unsaved data. This laptop works perfect with the power cord connected to it but must be turned on the way I described above. This is what I'm selling: Powerbook G4 15", one Battery, a home charger and two memory sticks, a 512mb and a 1 GB. if any questions, please feel free to email me ... abdalgalil@gmail.com