If you have any more details about the Evoko Liso model or the specific issue you're facing, I could try to offer more targeted advice.
: Get the latest Liso Device Reset (.gz) file from the official Biamp/Evoko Downloads page . Flash the Drive : Insert a USB flash drive (all data will be erased).
Most users do not know that the Evoko Liso actually has reset methodologies. The "Quick Reset" simply clears the user data but keeps the certificate store. The "Deep Factory Reset" (what we will cover) wipes absolutely everything.
Most of this time is spent writing the image to the USB drive. Common Pitfall
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