Motorola Moto X Force Troubleshooting Manual page 81

EMMC (Internal NAND)
MOTOROLA CONFIDENTIAL
If the phone is stuck at the logo screen or does not
power up completely or keeps enumerating in blank
flash mode then EMMC component could be
suspected:
1. Check the 1.8V, 2.95V supplies
2.95V accessible at C1610
1.8V accessible at C1620
2. Probe the EMMC_CLK line to measure 400Khz
first and then maximum of 177MHz.
EMMC_CLK accessible at C1011 or R1010
3. Wire our command and data lines along with
clock and put it on the scope. If the command
does not output the command information then
the EMMC controller inside the chip could be
corrupted.
CMD accessible at R1610
D0 accessible at test point
4. Note down lot code and date code.
5. Try user reset (hold power key for 10secs) and
restart the procedure.
6. If it still fails X-ray the board and reflow the part.
7. If it still continues to fail, the part might need to
go back to supplier.
Moto X Force/DROID Turbo 2
BASEBAND TROUBLESHOOTING GUIDES