Panasonic dmr es30v

Without seeing the actual unit, I would guess that the power supply has failed. These unit have what are called "switch mode" supplies that rely on circuits that oscillate. If a capacitor goes bad, the unit won't oscillate properly, thus no power. These are difficult to track, but are not usually expensive to repair. I would suggest a trip to a service center for a detailed repair estimate. Report the results here.

Dan