Sony KD-55X8 G Series Service Manual page 44

1.4 No Power - Muffin3 Failure
Muffin Fail Suspected
Muffin LOG is
displayed
No
Power uCom and
DDCON/LDO OK?
Yes
Crystal X1200
Is there 24MHz?
Yes
Muffin reset released?
ORESETB=High
Yes
eMMC clock present?
No
Replace Muffin3
Yes
Write DDR check
bootloader
No
Follow 1.2&1.3
No
Replace crystal
No
Check Power uCom
Follow 1.2&1.3
Yes
Write DDR check
bootloader
Is there DDR error?
No
Check Muffin Log
related to eMMC
Is there "CRC error"
No
Store SW log, check SW
behaviors.
Yes
Is there DDR error?
No
eMMC
data corruption
Yes
Replace DDR
Yes
Replace eMMC
Replace DDR
(Supplementary
information)
44