78E052 Controller Repair for Industrial Use

Problem statement : when TXD pin connected to ground and Reset applied or power on reset done on nuvoton 78E052 controller, it does not power up. Now if i remove ground from TXD pin, it power up.

Solution expected: 78e052 should power up even TXD pin low.

Firmware uploaded using TXD pin and RXD pin ISP mode then above test done after removing serail programmer.