Tag mechanical revolution x6ti-s

Mechanical revolution x6ti-s notebook no booting, the South Bridge is broken, and there is a sr2c8 in hand, which was disassembled before, so weld it REBALLING,Connect the power supply press the start button, the current jumps from 0.03 to 0.7, pause for 5 seconds or so,auto power off, the same is true for me under synthesis.I changed the backup BIOS and flashed it back. After pressing the power button, the screen turned on for 2-3 seconds. There was no auto power off in half an hour. The touch panel and keyboard were normal.