Nokia N70 restart | auto power on/off

when we go to menu, edit profile, the phone restart.
1. Try to turn on the phone without memory card
2. If the problem not solved try to set phone to factory defaut by *#7370#
3. Format memory card via computer
4. Re format memory card with cellphone
5. If the problem not solved try to flash (upgrade software)
6. If the problem not solved replace IC Flash and rebuilt imei.