Look for ZIP files labeled Condor_Open_M420HD_Dump_Original.zip . Ensure the file size matches the flash chip capacity (usually 4MB or 8MB ). How to Use the Downloaded Dump
Erasing the old, corrupted data and writing the new dump file.
Many sites claim to offer "USB loaders" for this model that are actually malware. Stick to raw .bin files and reputable hardware programming methods.