If the test page prints gibberish (random symbols or tiny characters), you selected the wrong driver chipset. Reinstall and choose "Generic / Text Only" or another ESC/POS variant.
Finding the official driver for generic thermal printers can be difficult as they are often re-branded. Here are the three best methods to get the software: Thermal Printer Mobile Lk 6018 Driver Download
If the printer uses a virtual USB port, ensure you install a USB driver first (standard for WIN7/8/10) to ensure the computer sees the specific COM port needed for communication. If the test page prints gibberish (random symbols
drivers.eu or printers-drivers.com (scan files with antivirus). Here are the three best methods to get
The Ultimate Guide to Mobile Thermal Printers in 2025 - AIMO
This is normal for many ESC/POS printers. Use a USB connection for permanent setups, or create a batch script that reconnects the Bluetooth COM port on startup.