There are several issues that can occur after replacing the mainboard. This applies to replacing the mainboard from 4.5.2 to 4.5.3 version. There seems to be some small differences between some mainboards and you might get following issues after firmware update:
1. LCD related issues (no fonts, icons, unresponsivness)
2. Pritner not heating properly
If you have any of the above problems, download the attached pack. You might need to do both steps to have make sure you have fully compatible firmwares.
1 If you have issues with missing fonts and icons, flash the LCD with the pack inside DWIN_SET_First archive. Unpack it and copy it to freshly formated micro SD card. Put the SD card in the LCD screen (you need to open the case first) and start the printer. Wait for the update to finish (you should see 'END' in the second line on the blue screen) and restart the printer. After that you should see the fonts and icons correctly. However this update will leave slightly thicker font used in temperature reading on main screen. To get rid of that, install the LCD update from DWIN_SET_Second archive. Repeat all the above steps to do that. Afterwards you should have a fully working firmare on your LCD.
2 If you have issues with heating, try flashing the printer with 'CR-6SE - V2.0.1.3 - HW - V4.5.3(0127).bin' file. Simply turn off the printer and put the file on freshly formated SD card. Put the card in the printer and turn it on. It will take slightly more time to start the printer than usually, so please be patient. After successfull update the printer should turn on by itself. Try preheating the machine. If you still cant get temperature to rise, please contact us for more instruction.