Error 7400 $ 8000

Error E7400 TV-Iris movement blocked Possible trouble: The host activated the TV-Iris movement, but the actual value did not change. Possible help: Sporadic: TV-Iris, mechanic needs too much force. Actual value potentiometer defective. Actual value potentiometer mechanically blocked. Check wires. D1 defective. -------------------------------------------------------- Error E8000 Videomed DC initialization timeout Possible trouble: Host registered timeout during initialization of the Videomed DC. Possible help: Check power supply of the Videomed DC. Check cables to the Videomed DC. Possibly Videomed DC or D1 defective.