I have a new 1200.1 amp and it seems to work fine, but I noticed that the power light stays yellow during operation. This happens if the sub is hooked or if it isn't; same with RCA cables. The other 2 amps are fine. I've checked and recheck all connections, but it stays yellow. The only time it's green is when I turn the system off. Then it stays green as the power leaves the amp, about 10 seconds maybe? Has anyone ever had this happen? Thanks.