Reading about android bricks, you can use "JTAG" to un-hardbrick a android device. Is this possible? And did anyone use "JTAG" or something like that on this device?
JTAG disabled by fuse bits.
Only 2 ways to unbrick: QPST files (didn't provided by vendor and not finded anywhere) or eMMC direct access (very hard procedure requires desoldering EMI shield, remove CLK jumper, solder 4 wires to PCB and special eMMC adapter).