i dont know what you mean with post your main bios here? i dont have file. i tried the .bin from the hp website both but no one works. and the pc ist just blinking 5 times slow red and 7 times fast white by pulling the power supply in ghe prodesk. nothing has a funtion.
yes i use the ch341a programmer. and the file from the forum member could perfectly programmed on the chip without any messages but the pc is just blinking again
i thought i have but i cant find it anymore normally i do backup everytime but maybe i have to look oncemore, later today.
try to flash and verify it with neo programmer also https://bios-fix.com/index.php?threads/ch341-software.49844/