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But since the user is asking for a guide, they might not know where to get the firmware. Maybe the company's support site has a section for firmware updates. Alternatively, if the device is old, maybe the company's site has moved on, and the firmware is only available through older versions.

file for your TV model and board version from specialized technician forums like Kenotrontv TCL Support Copy the file to the root of a FAT32-formatted USB drive. Plug it into the TV, then press and hold the physical

TPD.RT2841.PB772 is a widely used main board for TCL and Thomson smart TVs, particularly models such as the TCL L40S6500