Sony X930E Series Service Manual page 28

TROUBLE SHOOTING
FLOW
2-3. LED BLINKING 4X (LED VOLTAGE ERROR AND BCM ERROR)
LED VOLTAGE ERROR
4-times blinking
(LED Voltage)
High NG
Check "LD_ERR_DET" Voltage
Replace LD board Panel
at CL4458 on BMKP board
OK
Low
BMKP board LD board
BCM ERROR
4-times blinking
(BCM Error)
Check "LD_RDY"
Low
NG
Replace
At CL4460 Panel
LD board
on BMKP board
OK
High
BMKP board LD board
28
XBR-55/65X930E, 75X940E