I have a ONDA Vi40 android (4.0.3) tablet. I have used it for a week. It had no problem until today, after I shut it off to save the battery. When I started it again, I found the words "Preparing SD Card, Checking for error" and a sd card icon appearing in the taskbar all the time. And I found that all of my apps installed on internal SD card have disappeared from my tablet.
Moreover, If my tablet go to sleep after a certain inactive time, when I put the power button, it does not open. I had to press it for a long time and many times, then my tablet reboot again, and shows "Preparing SD Card, Checking for error" again.
I cannot use any file explorer apps to check for error in the internal sd card. Also I cannot access the storage & developer options function in the settings menu. And I cannot access the external sd card too.
I tried to reset the tablet from the settings menu. The tablet did reset and was back to the factory settings EXCEPT for the SD card error. IT STILL REMAINS......
Can anyone help me to resolve this problem.
How can i fix it!! And What is the Cause of the ploblem.
Thank you for every advice.