Pioneer SC-LX82 Reciever problem?

[bobbymax]

I have just got a box on my TV screen saying...
"Device cannot be operated.
Please check the connection.
(CEC100).
I'm guessing the CEC100 is a fault code...right?
Couldn't find much after I Googled afraid, so I've come back here
I have swapped the HDMI lead from the output to my TV (Pioneer LX-5090) still same message.
Does this mean I have to swopp every HDMI lead until it corrected, or is it something else?
Is anyone able to help me

 

[bobbymax]

Sorry guys forgot to add...
Apart from my Plasma, I have a Denon2500BT -a PS3 and BT you view box connected to the receive