Continuing the discussion from LCD Display brick?:
I am experiencing the exact same screen as the above link, except mine is on a Monoprice Maker Select Plus.
I am using a new 8GB Sandisk microSD card bought from Newegg, delivered two days ago.
I have tried installing and reinstalling firmware in all orders. The latest attempt was:
- CleanEEPROM firmware installed to mainboard via avrdude
- 4.0.6 installed to LCD via SD card
- 4.0.6 installed to mainboard via avrdude
I have done
screen /dev/ttyUSB0 115200 from Ubuntu. A few lines appear:
echo: Last Updated: 2020-03-08 12:00 | Author: (andrivet)
echo:Compiled: Mar 8 2020
echo: Free Memory: 2717 PlannerBufferBytes: 1664
echo:EEPROM version mismatch (EEPROM= Marlin=V55)
echo:Hardcoded Default Settings Loaded
echo:SD init fail
Based on ADVi3++, Copyright (C) 2017-2020 Sebastien Andrivet
Sponsored by Alexander Cherenegar
This message repeats ad infinitum. So the mainboard must be in a reboot loop. I think that on the “EEPROM version mismatch” line there should be “EEPROM=V##” but instead there is “EEPROM=”.
What are some ways to troubleshoot and/or fix the issue?
I have checked the LCD-mainboard cable connection and pushed the two ends into their respective connector ports. The connections seem solid.