Lapbook 12.3 has been working fine for 3 weeks. Now does not boot consistently. Most of the time after pressing power on the blue LED stays on and nothing happens. Occasionally it will display the Chuwi logo but then boot into the UEFI shell. Keyboard does not always work in the shell but a USB keyboard does. Very rarely the logo is displayed and boots into Windows OK. Have not upgraded the BIOS with latest. Any ideas - is this is a BIOS or hardware issue or something else?
The symptoms you describe are not good. Everything points to a problem in the eMMC. If you have already updated the BIOS, all you have to do is restore or reinstall Windos to rule out a software problem. If that does not correct you must open a ticket on the seller and exercise the guarantee. You can also check at firstname.lastname@example.org