I've got the same exact problem. The device is around 2,5 years old, and it suddenly stopped working a couple of days ago.

After powering it on the LCD screen backlight flickers, and two bars appear on the screen before it freezes. Switching power off and on from the front repeats the process.

Could be a problem with the PSU, could be something else. Any ideas if DMM is taking these in for repair? Seems like a design problem with DM7025..