rear dvd not working

[pitpal]

Im having trouble playing a dvd through the screens located on the headrests of the front seats. The actual unit is under the rear seats and i cant turn the unit on. Ive looked over the manual but cant find any info on how it works?

Its an 05 H2 and ive owned it for only a few months and tried it over the week end for the first time. Im either missing something or its not working.

Thanks in advance