Error when replacing Drum cartdridge

Hi all,

A user changed the drum cartdrige for the Xerox WorkCentre 3345 after I bought for them an original brand new one but after he replaced it, the printer say error "install Drum Cartdridge" (see pic). We rebooted the printer many times, removed all drums and toners cartdridge but nothing, still the same message.

Anyone have a idea how to resolve that please ?

Thanks in advance,

Pablo