(bootloader) switch should only be used if you are updating the programmer's firmware itself. Alternative Drivers : If the standard J-Runner drivers fail, you can find alternative installers on community sites like Weekend Modder Windows 7 Virtual Machine
: Don't use the old 2012 J-Runner; use the Octal450 GitHub version which includes the latest drivers. drivers jr programmer v2 install
If the programmer is powered, you should see a green light . (bootloader) switch should only be used if you
: If Windows 10/11 remains problematic, many users find success using a Windows 7 Virtual Machine drivers jr programmer v2 install
Where it falls short
: The soldering on the pin headers can be fragile on some "clone" units.