This is an extreme long shot, and did work for clearing factory type errors from Sony cameras years ago.
Do a factory reset. Remove all batteries and power from the camera, including the lithium battery that maintains the date and user settings.
Put the camera in play mode and leave for 60 seconds.
Re-attach all power.
I am assuming that you have no picture in the viewfinder AND LCD
Best of luck
COMPAQ something or other with 500Gb Boot Disk, 1Tb external Firewire Disk, 4Gb Memory and a super duper sound card, 19" TFT Monitor etc etc etc
Sony TRV33e : Sony TRV310e : Canon XM2
Sony Vegas Studio editions to v11
Remember, there is always more to learn than there is to teach.