If the SD card is verified to be inserted in slot fully  and contacts are on the proper sides, have you (while scanner is powered off of course ) tried to put the card in a card reader on pc and see if the card files that should be on it still exist, because if you formatted the card accidentally it erased the files.

Hi, so you mean the tool is in blank screen when startup or when entering any vehicle software? Can you please send a picture of the screen to support@autel.com for us to check? If it is hardware problem then you may need to return for repair. Thanks!