Once the blinking stops or the screen turns on, the update is complete. Reliable Sources
Sandeep. Post Sat Dec 28, 2019 6:14 pm. T-RD8501-03 USB Firmware Software Bios Bin. -1024x768. -1280x768. -1280x1024. -1366x768. - Lab-One Forum
RD8501 / T-RD8501-03, a common "universal" driver used to repurpose old laptop or monitor screens into standalone TVs or displays. Resolution: 1400x900 (often 19-inch widescreen monitors).
Do not turn off the power during this process, as it can "brick" the board.