Error occurred please trun unit off then turn on again

That error indicates there is a problem with the laser unit. I suggest you search for technical assistance

Then what happened ?

Error occurred please turn unit off then turn on again in mdh1

Hello there .
Well according to a manual,
Sounds like the Hard Drive is faulty.
"ERROR OCCURRED. PLEASE TURN UNIT OFF, THEN TURN ON AGAIN." is displayed.

The unit has automatically detected an error. Restart
the unit by turning the power off and on.

The power will be turned off in about 1 minute if the
power is not turned off and on.

Repair is needed if it is repeatedly displayed even if it is restarted. Detach the power connected, contact consumer support. ( Do not attempt to repair the unit by yourself

So......why not try a FORMAT of the Hard disk drive which seems to be at fault....nothing to lose friend Worth a try !!!!
Page 142 of this manual http://service.us.panasonic.com/OPERMANPDF/HDCHS700-MUL.PDF

error occurred. please turn off,then turn on again

My camera mdh1 Error occurred Problum Solution

aser scanner unit error.
Turn off the printer, and then turn it on again. If the same error occurs, turn off the printer, then contact the store you purchased the printer, or a service representative. When contacting the service representative, inform them of the error code displayed and symptoms.
Error Code: E100 0000

Laser scanner unit error.
Turn off the printer, and then turn it on again. If the same error occurs, turn off the printer, then contact the store you purchased the printer, or a service representative. When contacting the service representative, inform them of the error code displayed and symptoms.
Error Code: E100 0000

Here is the PDF version of the manual:http://www.nintendo.com/consumer/downloads/DSi_English.pdf
Page 98:
Turn the power off for a moment and then turn it back on. Repeat whatever you did that caused the error to occur. If the same message still appears, the system must be inspected. Turn the power off, and contact Nintendo Customer Service.
Good luck and hope this helps. RJ

when i trun on casio exlim s1,,system error occured,,,