Turning on mag 254

[Italfrank]

Hi next day when I turn on my 254 it shows a 3 second shot of the server epg frozen .
I have to push power to turn of and then push power to turn back on to get it to work not correct I also noticed one time this happened my screen resolution changed and my epg was all a different colour and weird picture any ideas I have another mag 254 and you just turn on and of normally like turning on and of the tv tried a few things cannot fix any help please