With the TV's power off, insert the USB. Hold the power button on the TV panel (not the remote) and plug the power cord in.
If successful, the standby LED should flash rapidly, indicating the update is in progress. Do not turn off the power during this 2-3 minute window, as it can permanently brick the motherboard. Pros and Cons Pros: Effective at fixing "Hang on Logo" issues. Download ONIDA LCO22VMO Firmware USB rar
High risk of "bricking" if the firmware does not match your specific board version. With the TV's power off, insert the USB
but having a different internal board number) can lead to a "black screen" or inverted colors. With the TV's power off