4GB THGBM5G5A1JBAIR eMMC and Winbond W25Q16DVS Spi Flash.
Attempt a standard software update via USB first.
Mstar MSD6369IV (32-bit SoC with 1 ARM core and 1080p Full HD GPU).
If the USB method fails, the eMMC chip must be desoldered and flashed with the firmware image (User and ExtCSD partitions) using a programmer. Official Resources
For official drivers and documentation, you can visit the DNS Support Page for the 42AK9000 model.
42-inch Full HD (1920x1080) LED panel (model 420B1LED6K / p/n: 72001350K ).
KPS-L090C2 (utilizing TEA1733 and 4N60L chips). Flashing & Recovery Process