I am experiencing the same problem for three month now with my two years old DM 7025. The box doesn't come on from standby. The only thing it does is light up the blank display. I have to shut down the box completely and then power up again. For three minutes it doesn't do anything but makes a funny noise coming from the display unit. After about three minutes the box suddendly tries to boot but needs a couple of tries. Finally it will boot and tune in. But after swichting it to stadby, the box will not come up again.
Any ideas so far?