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Chassis: RB2G, HE-H
Chassis: RB2G, HE-H
16
RB2G
CHASSIS
W850B
3-1-4. NO POWER – AYU2/AYU2L failure
AYU2/L Fail Suspected
eMMC /
RawNAND erase
Product SW rewrite
No
Recover?
Product SW
writing issue
Yes
Check error message
Find Some
Error message
eMMC/ RawNAND
AYU2/L LOG is
displayed
Yes
Store SW log
Yes
No
Check
eMMC / RawNAND
using CheckSW
No
Check DDR
using CheckSW
Find Some
Error message
No
Yes
g
It is unacceptable
error?
Erase & Replace
Yes
(1) Check DDR &
eMMc / RawNAND
Replace
AYU2/L or Board
eMMC/ RawNAND
data fail
No
Store SW log,
Check SW
behaviors.
Yes
Data fails are
especially in
environment area
especially in
environment area
DDR device fail
Erase
From the error
message, we can
find which device
h
message, we can
find which device
h
f il
Erase & Replace
eMMC/ RawNAND
Product SW write
interface OK?
Replace Board
AYU2/L or Board
No
environment area.
If this Area has
broken, check soft
cannot run
broken, check soft
cannot run
In this case, corrupted
data are written to
eMMC/ NAND flash in
proper way.
data are written to
eMMC/ NAND flash in
proper way.
eMMC/ RawNAND
has failure.
Move to device
analysis phase.
analysis phase.
If still NG after SW
rewrite, please go to (1)
Check MMC/RawNAND
interface
rewrite, please go to (1)
Check MMC/RawNAND
interface
Replace Board
So, we have to check
the logs of exception or
errors.
the logs of exception or
errors.
Erase eMMC/
RawNAND is a last
RawNAND is a last
RawNAND is a last
option. If still NG after
erase, please replace
eMMC/RawNAND
option. If still NG after
erase, please replace
eMMC/RawNAND
2.1-4 - No Power: AYU2 / AYU2L Failure
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