Originally posted by FarSideX
Are you on DEX?
If so when your PS3 is turned on connect with target manager and set the boot mode to System Software mode and not debug mode.
If you use the power button trick SQUID-EYE recommends you need to either do that all the time or go into the debug setting and set the boot mode to System Service Mode. Debug mode is used for debug consoles that do not have a monitor connected to them so no video is output, it is the intended behaviour of that boot mode.