STEP BY STEP REPAIR KMVYL000LM:

DEAD EMMC:



DISCONNECT ALL EMMC LINES [POWER, CLK, CMD, DAT0] AND MAKE SHORT TP to GND




THEN CONNECT ALL EMMC LINES AND REMOVE SHORT TP to GND:



SELECT FIRMWARE UPDATE AND CLICK CUSTOM OPERATION:



CONFIRM EMMC PART NUMBER:



FIRMWARE UPDATE START:



WHEN LOG SHOWS 'Repairing eMMC CID...' AND PROGRESS START MOVING,
RECONNECT ALL EMMC LINES [POWER, CLK, CMD, DAT0], YOU HAVE 20 SEC FOR THAT:



FIRMWARE UPDATE DONE:



RECONNECT ALL EMMC LINES [POWER, CLK, CMD, DAT0]
AND CHECK EMMC FUNCTIONALITY: