Thank you Frédéric for sharing the old BIOS file, it REALLY saved me! I totally screwed myself loading the “newer” BIOS from the download section on my 221510XXXXX and couldn’t get the touch or sound to work no matter what driver I used, I tried re-flashing with the older BIOS archived in the download section and that didn’t help, I’m assuming because it was never meant for the 221510 serials. But thankfully I found your post and re-flashed with the old BIOS you posted and now all is back to normal!
The whole reason I flashed the BIOS in the first place was to fix my USB ports (the tablet’s USB ports were somehow disabled from the factory when I received my unit and I read that re-flashing the BIOS should fix that). Well the re-flash fixed my USB but broke my touchscreen and sound, so anyone with a 221510XXX that has dead USB ports, use the instructions provided here: http://techtablets.com/forum/topic/disabled-usb-ports-how-enable-again/ to re-flash the BIOS without access to the USB ports, but be sure to use the BIOS Frederic provides at the top of this page.
I’m staying on 8.1 for now since everything is working. I hope they archive this 221510XXX BIOS in the downloads section here for others with the same serial, because currently the two Vi10 BIOS files there now will just cause trouble for people on the 221510XXX serials 🙂
Cheers!
