Is there a "Help" screen on the Craig cmp-756

maybe a hardware issue have tried hard reset the tablet

Only the manufacturer can perform a factory reset. In order to do this, you need to send your machine to the site where it is done. Call the service number provided with your purchase.

Hi John:
Click opn this link
https://www.google.ca/search?q=John+Deere+755+service+manual&rlz=1C1GGGE_enCA468&oq=John+Deere+755+service+manual&aqs=chrome..69i57j0l5.888j0j8&sourceid=chrome&ie=UTF-8

http://mediafiretrend.com/c/craig+tablet+cmp741e+firmware+update+mediafire.html

Bring it back to service. They should wipe and instal again.

Craig Electronics has uploaded a new firmware update to their website that will correct this issue along with other small bugs that the 4.1 firmware had. The 4.2 update makes the device run a lot smoother and provides a better Android experience.

http://www.craigelectronics.com/site/pdetails.php?id=580 < This is the link to the website. You must follow the installation guide this will require a SD Card to complete. Craig Electronics Inc

You can't get them back

Press "F8" at computer start and select the repair option.

Hello!
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Just launch detection and follow the instruction
http://www.touslesdrivers.com/index.php?v_page=29
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