Rotel Amp center channel out

Question

Hi.I recently set up a home theater audio system that has a Rotel THX Amplifier. When the amp starts up it has a diagnostic panelon the front that shows status for left, right and center channel checks. I was testing it with a DVD and noticed no center channel sound was coming out. I checked the speaker wiring and turned the sysytem back on. It was then that I noticed the diagnostic light for the center channel was out.Just wondering if this thing is ready for the repair shop, or if there is something else I can do to reset it.Thanks.