I fought with my 3v2 for TEN DAYS with no luck. Then I just got the blue painters tape, covered the bed with that, readjusted the height and print to my hearts content.

Then I flipped the bed over to the plain glass and suddenly I could printe PLA without the tape! I was thrilled.

Then a few days later that stopped working so I went back to the tape.

I just bought the print leveling sensor. I had become aware the the bed was not perfectly flat. Figured this would go a long way to ease my frustration.... HA

When I tried to upgrade my firmware, the whole printer is useless... it will no longer boot. I've had the printer for 4 weeks and I swear I have spend three weeks fighting with it.... Grrr.

I know there are other posts here about this and dozens elsewhere on the internet... but nothing I do solves this issue. I have:

Formatted the SD card
Put the new .bin file on the card
Inserted the SD card and turned on the printer. That's when the problem started. I have not seen the welcome screen since.
Turned off and unplugged the printer.
Reformateed the SD card
Downloaded the original firmware .bin file and loaded it onto the SD card with a fresh name.
Turned on the printer, nothing.
Turned off the printer, took apart the screen.
Loaded the SC card with the appropriate DWIN_Set folder
put the SD card in the video slot and turned on the machine.
it appeared to update because after a few seconds the screen turned orange.
turned off the printer
reformatted the SD card
loaded up a different firmware .bin file with a fresh name onto the SD card and inserted into the printer.
turned on the printer, nothing.

I have repeated many of these steps many times. I have also checked all the wiring, etc. and everythging seems fine.

ARRRRRGGGGHHHH!

Help!