What happens when you wait just a bit? I've got an RCA TV that does the same thing. I just wait a few seconds, and it comes up with the BIOS screen okay.
Now, what I DO find annoying about this TV is if the signal degrades even just a hair, I get the 'Unusable Signal' screen. I had to attach my NES to another TV as it would flash this about every five seconds, rendering games unplayable (well, not unplayable, but extremely distracting...)