The tivo turns on like normal with the welcome start up screen, then all lights on the front of the TiVo start flashing together (Red, blue, orange, green) and the welcome screen doesnt advance. The fan is on, I replaced the hard drive with a green power hard drive that had been working fine for over a year. Any idea what needs to be fixed, i read power supply failures but with the top open i tried to look for a replacement board on weaknees but none of the boards look like what I'm seeing in my unit. I bought a red wd hd to try out but that comes in on Monday. Thanks for any help.