If the phone only shows a port but fails to flash, or if the DC power supply shows a specific low reading (e.g., 57mA) that drops to zero, the may need to be removed and re-soldered (reballed). CPU Repair:
The Samsung Galaxy A136U (often referred to as the Galaxy A13 5G or A13 5G Metro/T-Mobile variant) is a popular budget 5G device. However, like many Samsung devices using the Unisoc (Spreadtrum) or MediaTek chipsets, it is notoriously prone to the dreaded syndrome. samsung a136u dead boot repair
Someone on GSM-Forum said using patched Odin + a full CSC (not HOME_CSC) after forcing EDL with test points works. But I can't find A136U test points. If the phone only shows a port but