My Sony TV kld-40ex400 is blinking one

Sony 4 blink code means either the backlight inverter board is bad or one of the backlights in the LCD panel has failed. It can also be the LD board or main logic board, check inverter board wires for arcing to ground.

Usually manufacturers use as many standardized components as possible to reduce costs so it is highly probable that the power cord on both a 40 & 50 inch sony tv in the same series is identical.

Connected to what? What are you watching? Sony KLV 40EX400 Manuals

IIC bus clock and/or data lines low at power on 06. This is the fault, according to the blinking codes given by Sony LCD TVs. That is, the fault lies within the main digital board. To locate the exact fault point to these type of fault, is actually a skilled one. If you wish to get more details to this fault, check the link sited here.http://electronicshelponline.blogspot.com/ It has details about these blinking codes. Before proceed, once again count and make confirm the number of blinks occur at one time switch ON. Pull up older posts by this link at its left side bar.

While looking found this:

Found this service bulletin for sony KLD
KLV40EX600 not austalia model but think KDL will be similar

Model No: KDL-32EX400 KDL-40EX400 KDL-32EX500
KDL-40EX500 KDL-46EX500 KDL-55EX500
KDL-32EX600 KDL-40EX600 KDL-32EX700
KDL-40EX700 KDL-46EX700 KDL-52EX700
KDL-60EX700 KDL-40HX700 KDL-46HX700
KDL-55HX700 KDL-40NX700 KDL-46NX700
KDL-52NX800 KDL-60NX800


SUBJECT: Counter measure for Intermittently 5 times standby LED blinking
SYMPTOM: Customer may report that intermittently after AC OFF/ ON (or Deep Standby/ ON), TV will shut down with LED blinking 5 times. If set is placed in Standby, then On, symptom will re occur. If AC is removed, set will work normally when AC restored
CAUSE: Timing mismatch of I2C communication causes interrupt signal inside TV. This causes TV to shut down with error 'Standby led flashes 5 times'

SOLUTION: This is a user correctable issue -
Where possible, please refer customer to Sony Website -(or ) and search for relevant model to download correct update. If the unit is in Workshop, please perform update as per Instructions.

that"s difficult things. but you could try it. but you must check its --t-con board all connection if it same include which connection to what & all voltage must be same. good luck!

the 6 blinks abdormal speaker voltage or backlight issue if you still have the manual it will tell you how to diagnose it and fix it.

speakers in tv or wiring going to speakers or in menu someone has muted internal speakers or plug on pcb board has lost connection

check your cable speaker, this may not caused from seting, but from tv mainboard