The board appears dead due to corrupted eMMC data.
Holding the power button on the TV and plugging it into the wall to initiate the "force flash" recovery mode. Download MT5510S PB802 1920x1080 VIVAX REF86 part01 rar
1920x1080 (Full HD). Firmware for these boards is resolution-specific; using the wrong version (like 1366x768) can result in a distorted or blank screen. The board appears dead due to corrupted eMMC data