Sanyo AVM3258G "No signal" error...

[knockbill]

I moved this TV to a different room today, and got a "no signal" message when hooked up to replace a smaller TV on the same cable... Both TVs were working fine before the switch... Went thru the menu and auto channel search a few times with the same result... I think the Sanyo was using the Video connection with RCA jacks right off the Fios box in previous location,,, but wont "see" CATV cable jack,,, or CATV or RCAs off antenna converter box in new location... Presently have smaller TV working off new location, with CATV and antenna, so inputs are working...
Any ideas are welcome,
Thanks...