How do you get into test mode? My unit is bricked and won't go past the splast screen. I'm unsure if testmode is set of files or a couple buttons that have to be pressed. I need help now!!!

update: I found the v3.0 testmode files and put them on my sd card. When I booted up I saw a screen that looked like the windows screen on a computer but it then went back to the black screen after 2 seconds. HELP!!!

Could this be a fuse problem? or do you guys think that its a corrupt file?