Sony GN1G - Page 43

3-2-5. NO Power (Muffin failure (Main Device))
43
TROUBLE SHOOTING
KDL-50W800C, 805C, 807C, 809C/KDL-55W800C, 805C
If still NG after SW
rewrite, please go to
(1) Check eMMC
interface
In this case, corrupted
data are written to
eMMC in proper way.
So, we have to check
the logs of exception or
errors.
Erase eMMC is a last
option. If still NG after
erase, please replace
eMMC
Muffin Fail Suspected
(1) Check DDR &
eMMc
interface OK?
Replace Board
Find Some
Error message
Replace
Muffin or Board
No
Muffin LOG is
displayed
No
Yes
Store SW log,
Check SW
behaviors.
No
Yes
Yes
No
Check Muffin Log
related to eMMC
Check Muffin Log
related to DDR
Find Some
Error message
Muffin
or DDR failure
No
Yes
Erase
eMMC
From the error
message, we can
find which device
has failure.
Move to device
analysis phase.
eMMC erase
Product SW rewrite
Recover?
Product SW
writing issue
Yes
Check error message
It is unacceptable
error?
Erase & Replace
eMMC
Yes
Product SW write
Please go to (1)
Check DDR
interface