Lost Communication with the 1220 Infinity 2 HPLC. How do I get it back?

Our HPLC just dropped communication to it's computer. We have pinged the computer and it can receive a signal but when we pinged the instrument from two separate computers we got nothing. We believe it's the communication board but the instrument is only two years old and we're hoping it is not the board. Does someone have a possible fix? Maybe we need re-configure the BootP setup? 

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