# Flashing is not working for ender 3v2 **URL:** \ **Category:** General Discussion\ **Created:** [April 6, 2026, 3:51pm UTC](https://klipper.discourse.group/t/flashing-is-not-working-for-ender-3v2/25836 "2026-04-06T15:51:52Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Dho1925](https://avatars.discourse-cdn.com/v4/letter/d/df705f/32.png) [@Dho1925](https://klipper.discourse.group/u/Dho1925)\ **Post date:** [April 6, 2026, 3:51pm UTC](https://klipper.discourse.group/t/flashing-is-not-working-for-ender-3v2/25836/1 "2026-04-06T15:51:52Z")
### Basic Information: Printer Model: Ender 3V2 MCU / Printerboard: 4.2.2 with GD Host / SBC Raspberry PI V3 klippy.log [klippy (3).log](https://klipper.discourse.group/uploads/short-url/pD6WH4QM48BRtcn3hOtrnaqZUpj.log) (111.9 KB) ![image](https://global.discourse-cdn.com/free1/uploads/klipper/original/3X/2/9/292584c01ec538cdff0d6e34c9efe680dcc6f745.png) I started the “make”, copied the .bin (named fw0406.bin) to a sd, and started the printer, without connection to the pi or the display. After a while, I switched the printer of, dismounted the sd-card, connect the usb to the raspberry, and powered on again. on the minimon I got the message Update failed, No SD/TF-Card or error Update failed, No SD/TF-Card or error … and the printer is clicking 4 times. So i deleted the fw0406.bin, and copied the marlin fw to the sd. (without usb) after a view moments the marlin sw start, without any problems. the filesize of the fw ist 38kByte. What do I make wrong? thx Dirk ---
**Author:** ![cardoc](https://avatars.discourse-cdn.com/v4/letter/c/ec9cab/32.png) [@cardoc](https://klipper.discourse.group/u/cardoc)\ **Post date:** [April 6, 2026, 4:29pm UTC](https://klipper.discourse.group/t/flashing-is-not-working-for-ender-3v2/25836/2 "2026-04-06T16:29:25Z")
Did you even try to connect the Pi to the MCU before flashing back? SSH in and use kiauh to find the MCU or run `ls /dev/serial/by-id/*`. > **[Building and flashing the micro-controller - Installation - Klipper...](https://www.klipper3d.org/Installation.html#building-and-flashing-the-micro-controller)** > > These instructions assume the software will run on a Linux-based host running a Klipper-compatible front end. It is recommended that a SBC(Small Board Computer) such as a Raspberry Pi or Debian-based Linux device be used as the host machine (see the... I don’t know for sure what display you have but many won’t work before Klipper initializes the MCU with info from a valid printer.cfg file. EDIT: apparently getting your stock display to work under Klipper takes some work. > **[GitHub - odwdinc/DWIN\_T5UIC1\_LCD: Python class for the Ender 3 V2 LCD](https://github.com/odwdinc/DWIN_T5UIC1_LCD)** > > Python class for the Ender 3 V2 LCD ---
**Author:** ![Dho1925](https://avatars.discourse-cdn.com/v4/letter/d/df705f/32.png) [@Dho1925](https://klipper.discourse.group/u/Dho1925)\ **Post date:** [April 6, 2026, 4:41pm UTC](https://klipper.discourse.group/t/flashing-is-not-working-for-ender-3v2/25836/3 "2026-04-06T16:41:36Z")
Yes I read a lot, but I tested a zip file here from the forum which was nearly working, but the version was to old. Then I got in mind that perhaps the transfer via winscp ist the problem: BINGO I made a tar out of the bin. downloaded it, extracted the tar and copied the bin to sd-card. And : ABLOUSE. the connection was astablished. It was one day of work. Frohe Ostern1 ---
**Author:** ![cardoc](https://avatars.discourse-cdn.com/v4/letter/c/ec9cab/32.png) [@cardoc](https://klipper.discourse.group/u/cardoc)\ **Post date:** [April 6, 2026, 5:41pm UTC](https://klipper.discourse.group/t/flashing-is-not-working-for-ender-3v2/25836/4 "2026-04-06T17:41:09Z")
Glad you got it sorted out! Please mark your last post as the solution. ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/klipper/original/1X/64419bf2aac6639e6ef5cef200dcd456b0a01ac3.png) [@system](https://klipper.discourse.group/u/system)\ **Post date:** [May 7, 2026, 3:41am UTC](https://klipper.discourse.group/t/flashing-is-not-working-for-ender-3v2/25836/5 "2026-05-07T03:41:18Z")
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