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I have an Ender 3 Pro 4.2.7 2.0.8.2 that I haven't used for a couple of months; switched it on, all perfect. I tried to print a model and the PLA wouldn't stick to the bed; I think the hotend was a fraction high.

Re-adjusted bed to ensure square and flat as hadn't been used. Switched off and then hotend defaulted to 5 mm above table. Thought I'd do a firmware update, load the latest software put, it on a clean, formatted (4096) SD card, switch off power put the card in, and switch it on, just booted up as normal, ignoring the firmware update.

I followed all instructions from the web including a new card, renaming the file, etc. Switched off, switched on. now when I try to do Auto Home or Level Bed, nothing happens, no beeps no movement, and a minute later get "Homing failed printer halted please reset". Check all connections, put a meter on all micro switches, and perfect.

Nothing now moves and don't know what to do.

agarza
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Laserman_UK
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  • "Switched off, switched on" -- make sure you don't have a USB cable plugged in during the power cycle, otherwise you're not fully "off." – Ivan Jan 09 '24 at 22:27

1 Answers1

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Check if the firmware is for the board version of your printer. Different boards may have different drivers or pin definition, which happens for example, when you flash a 4.2.2 firmware on a 4.2.7 board and vice versa.

Miguel Risco-Castillo
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  • Yes have checked, As I said, I tried to update to latest firmware, loaded SD card as per instructions, switched off printer, left for at least 30sec, put in SD card with .bin update but printer ignores card and just boots up as normal (with fault) – Laserman_UK Jan 08 '24 at 23:50
  • Rename the firmware to something like F123.bin – Miguel Risco-Castillo Jan 10 '24 at 05:55