# Cant flash the hex file (or it flashes but its not working)

**URL:** <https://marlin.crc.id.au/forum/t/cant-flash-the-hex-file-or-it-flashes-but-its-not-working/2594>\
**Category:** Support\
**Created:** [4 November 2025 00:11 UTC](https://marlin.crc.id.au/forum/t/cant-flash-the-hex-file-or-it-flashes-but-its-not-working/2594 "2025-11-04T00:11:25Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![macron0](https://marlin.crc.id.au/forum/letter_avatar_proxy/v4/letter/m/5f9b8f/32.png) [@macron0](https://marlin.crc.id.au/forum/u/macron0)\
**Post date:** [4 November 2025 00:11 UTC](https://marlin.crc.id.au/forum/t/cant-flash-the-hex-file-or-it-flashes-but-its-not-working/2594/1 "2025-11-04T00:11:25Z")

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Hi I downloaded

Ender5Pro-Stock-20251103.hex and Ender5Pro-Stock-20251026.hex

renamed to .bin as i read somewhere here and they dont work.

They seem to flashbut the display stays blue so I reflashed the firmware from the creality site (Ender-5 Pro\_Marlin2.0.6\_HW4.2.2-GD Version) and now the printer boots up again but sadly no z offset options anywhere

I had a bl thouch that went bananas useed it as a z endstop for a while but now to totally failes so I removed it going back to my old z endstop. but the official firmware from creality does not let me set the z offset (I am sure the firmware it came supplied with did that just fine so I gues that firmware would be a help too but of course I did not wrote the version down before I flashed over it.) any idea why the hex file from this site dont work? I have and ender 5 pro with the 4.2.2 board. I think its the GD mcu because this version runs (Ender-5 Pro\_Marlin2.0.6\_HW4.2.2-GD Version firmware)