We have to start completely fresh here. If you started from a ROM earlier
than October, your current MCU version is < 9.20.
The errors you get ("can't verify ..5009_60.zip") is due to incorrect signing and mixing all kind of ROMs and files and probably the TWRP recovery image. That will definitely not work.
Download/Use the latest ROM (2018-1-26; see below in blue) from here
. (From this Joying blog https://www.joyingauto.com/blog/cate...iles-released/
Below updated files is (2018-1-26) version . please check :
Updated files for HD resolution 1024*600 :
MCU version is 9.20 or more later please click Here
MCU version is 5.25 or more earlier please click Here
If you flashed the TWRP recovery from the custom.apk then first write the stock recovery back.
Before trying to flash remove all SD-cards and usb-sticks from the unit and reboot with the usb-stick (or sd-card) with the complete unzipped ROM. Do not alter anything on this downloaded ROM.
Please try to flash that first. Then we see if it works or what error message we get. Do not try all kind of things with the TWRP/gtx ROM before your firmware and MCU firmware is correct.
If this doesn't work then we use the reset method: Use the same usb stick and use a "pointy thing" (needle or so) to reset your unit. Do this 3 times (reset immediately when you see the logo coming). Then the unit's leds will cycle purple/pink a few times and reboot the unit again perhaps 3 times and will then (hopefully) start the flash of the ROM. The pink/purple flashing/reboot can take 10 minutes: Have patience.
has a few hints here as well.
Edit: and now @gtxaspec
's post and mine are crossing.