Toshiba TDP-ST20 - keeps switching off at random intervals

[bertster]

Hi, One of our classroom projectors (Toshiba TSP-ST20) keeps switching off at random intervals. This is anywhere in the range of 10 - 30 mins. The standby light is orange and the projector will start up again immediately when we switch it on via the remote, so I don't think its an overheating issue. Has anyone experienced the same? Thanks