Here is a video of a Dreamcast startup animation. It is filmed real time and not slowed down. The console has not been underclocked either. Please help it recover.
wow, that's interresting.. i have seen something similar, when there is no gd-rom attached (resulting in a super slow running AICA-Chip, because it gets it's RAM-Clock from the GD-ROM basically). But in that case, audio would be super (funny) slow, too.. Every other components gets it's clocking from the DC-Board, so i really don't know what's causing this right now :/
I had this. Turns out i had dirty pins on the power supply board (sorry dont know tech name) instantly solved
This is not the case in this instance. Cleaning pins and connectors with alcohol was one of the first things I tried.