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Prusa i3 Hephestos does not work with new firmware

Serge007
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Serge007

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Posted · Prusa i3 Hephestos does not work with new firmware

I have the BQ Prusa I3 Hephestos printer. It worked fine. I decided to replace its firmware with new Merlin 2.0.0...

After that LCD shows two lines of "bricks" (even after connecting to the power source), buttons on LCD plate do not work, nothing works... Cura can't control the printer (no extruder movemenet, no parking... no printing) though it can communicate with the printer (in a strange manner)...

How can I return the things back (to the state before the new firmware burning)?

Maybe I simply need to change some variables in a new *.ino using Arduino IDE?

I tried 115200 baudrate, motherboard type 33... no result... Wrong display type? Anything else?

Thanks in advance for any useful advice. 

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