Do a search, some one posted solution to this a few weeks back.
Is that the one in the Lind 8 forum about touch screen not working after a reset? I read through that but it didn't seem to help. Also, the touch screen doesn't seem to work with the BIOS screens hence the FJ firmware question. Do you have an 8/810 and if so can you confirm whether you received the FJ update?
Sorry, miss read your first post. It appears you have same issue as linx 7 and 10 users. However there tablets were bricked by last windows update.
Are you able to use keyboard in UEFI? if so, you could try and get the BIOS file from Linx to reflash and try and fix.