When I switch my Hitachi C24W1TN on it works fine for 10-20 mins then switches itself to standby mode. Does anyone know what might be causing this?

luke, April 2007

funnily enough my widescreen hitachi does the same,not sure of the model number as i,m at work but its a 32 inch.Also goes off during certain adverts,usually animated ones and on certain channels but it always goes to standby,i did wonder if it was my sky box or the tv,i guess its the tv.

al, May 2007