It is self-explanatory. There are similar faults posted previously. Risk of consequence must be understood before deploying information automation tool.
If the display is for information of the mall, failure does not matter much and at most the reputation of the management office.
But if the display shows real time high value trading, failure will cause substantial direct and indirect financial impacts. Direct is the loss of opportunity to conduct transaction by the users of the display. Indirect could be claims thru litigation by users of the display causing their direct loss due to this failure.
Technically, multi-displays are deployed for resilience. From policy perspective, users must sign usage agreement to undertake consequence due to machine failure and disclaim the service provide for any direct or indirect losses.