20inch

Hi all, My X920BT will not boot. the screen stays black the buttons light up and i can eject the disk. Also the fan on the back is running really hard. this has happen before and a couple days later it started working again and once it finally booted i think i recall seeing something like protection mode? Is it any way i can fix this because my warranty just expired 2 weeks ago. Oh this started after i disconnected the battery.