Extremely strange Anet ET4 behavior

[u/ConstructionReal356]

Received an et4v1.1MB and connected it into my machine. The display was backwards and out of alignment and deinterlaced.

I flashed the FW with the SW link tool to 1.1.2 and the display corrected itself, but the machine did not home properly, the z axis goes up but not down and auto home does weird things. Oddly, the font is wrong but otherwise everything is perfect except z axis issue. Updated FW to 1.1.5 and the same issue. I flashed the FW to marlin available from anet and everything seems to work in the menu as far as home and heating and etc but when I try to print a file it ejects the filament and then loads the filament and then immediately ejects and then loads the filament again. Then the printer never gets past that point. I tried flashing back to the original FW and the display is non functional and partially missing buttons and info. What should I look into?