Installing the wrong firmware can "brick" your TV. Always verify that your board number matches P150-638V6.0 exactly before proceeding.
Plug the TV back in while continuing to hold the Power button. Download P150 638V6 3840x2160 ONIDA part04 rar
Right-click part01.rar and select "Extract Here" (using WinRAR or 7-Zip). This will automatically combine all parts into a single .bin or .img file. Installing the wrong firmware can "brick" your TV
Copy the extracted software file directly to the root directory of the USB (do not put it in a folder). Update TV: Turn off the TV and unplug it from the power outlet. Insert the USB drive into the TV's USB port. Right-click part01
Format a USB flash drive (8GB or 16GB) to FAT32 .
Press and hold the on the TV panel (not the remote).
Below is the text typically used for this specific download and installation: File Name: P150_638V6_3840x2160_ONIDA_part04.rar Device Type: 4K UHD Smart TV (Onida 50-inch or similar) Mainboard: P150-638V6.0 Resolution: 3840 x 2160 (Ultra HD) Installation Instructions