Dell venue 11 - Crashes with travel keyboard after Factory Reset, Time-of-Day not set bios error

Hi, I bougth an used Dell venue 11, so i did a factory reset to clean the tablet, all gone good but after use the tablet I saw that when I move the tablet and the travel keyboard it makes the tablet restart, and makes dificult to turn it on, when the tablet finally turn on, the screen shows the next message:

Invalid configuration information - please run setup program
Time-of-day not set - please run SETUP program

So, I enter to the bios, change the date and restart the tablet, but after time of use, only with a little contact with the keyboard or the tablet it restarts again, and shows the same error

I tried to disconect the battery from the travel keyboard but the problem still present, other thing that I saw, was that when I turn on the tablet with the charger I can see a little white flash on the screen after dell logo.

What can i do to solve this problem???

The tablet works fine without the keyboard but i need the extra battery :C help