Mein vim3 hat nur weisses led an und kein bild im monitor

[Vladimir.v.v]

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Can not get VIM3 into upgrade mode

Hi All. I used the search function to find an answer to this but no luck. I am trying to upgrade the factory Android on my VIM3 to the latest version to get touch screen support etc. but after having tried all 4 ways to enter upgrade mode I am stumped. I ran the various tools/burners etc. and followed the instructions but nothing I tried will initiate upgrade mode. When using the USB upgrade mode should I also connect the VIM3 to 12 volt external power? I’m a bit nervous about doing this as I…