Sony KDL-40EX400 shutsdown

[geminidpr]

Sony KDL-40EX400 turn on for a few seconds then shuts down when the Sony Logo appears on the screen. It does this 3 times then I get a red light flashing 6 times. I replaced the inverter board with one that I purchased from Payless components and it still shuts down. I'm getting the 24 volts and none of the caps are bloated. I replaced the 24 volt caps just in case but it still shuts down. Any help will be greatly appreciated. Thanx.

[ryan74]

Re: Sony KDL-40EX400 shutsdown

I just got this model with the same problem and found a post online from a guy that did firmware update and it fixed his tv.
Sony has firmware update for this model, I just updated my tv and so far it has run fine 10 minutes.
I had trouble getting update started so I:
Plugged in
Turned on
Turned off ass soon as I heard startup chime(before error)
Plug in usb drive with update pkg.
Turn on

You should see green led then it switches to red and flashing amber.
Update in process
Wait about 10 min
When I went back the backlights were on
Turn off
Turn on again if you need to program channels

Service manual leads you to believe its a bad panel or inverter board

[ryan74]

Re: Sony KDL-40EX400 shutsdown

12 hrs running, several restarts and everything is fine.
I would get bl_error of 3.3 or 3.7vdc before update
Error is gone now.

[RJARRRPCGP]

Re: Sony KDL-40EX400 shutsdown

May be a bad primary cap.

[kevinm34232]

Re: Sony KDL-40EX400 shutsdown

Firmware update worked for me aswell on this model. TV would come on and shut down 3x before giving a 6 blink code.

[tsaymingshiann]

Re: Sony KDL-40EX400 shutsdown

power touch ng

[Regent]

Re: Sony KDL-40EX400 shutsdown

Thanks for the info!! "Firmware update worked for me aswell on this model. TV would come on and shut down 3x before giving a 6 blink code."

[whatusername]

Re: Sony KDL-40EX400 shutsdown

i just bought this tv this evening for $30.00 and guy said power board.. i did firmware update and like others it turned right on.. I love this forum

[budm]

Re: Sony KDL-40EX400 shutsdown

Great info! Link to the download will be great also.
Is this the one? it does not mention anything about error code or shutdown problem.
http://esupport.sony.com/US/p/swu-do...mdl=KDL40EX400

[daniel75]

Re: Sony KDL-40EX400 shutsdown

Hi, i have the same problem with a KDL40EX400 TV.

Nothing happens when i plug in the USB drive with the update file (fat-32 formatted), it keeps with the same boot sequence. (logo, turns off 3 times and then 6 red blinking lights)

Too bad, because reading this post kept my hopes up!
Any thoughts on this ?

[mredmond1112]

Re: Sony KDL-40EX400 shutsdown

Just tried this after ordering and replacing backlight inverter per Sony troubleshooting guide still had the same problem. Would come on shut down 3 times and get the 6x blink code. Downloaded the firmware update fixed the problem. Thank you for the post.

[Louis82]

Re: Sony KDL-40EX400 shutsdown

Hello there,

I had this problem back in June 2017, Tv tried to turn on for 3 times showing the sony logo for a sec and cut off, then the 6 blinks. I replaced the main board (purchased from SJ) everything worked until now. Tv is doing same thing again.

Do you guys believe that main board broke or maybe there is a defective lamp causing and error code on main board and stopping tv from operating normally.

Ay suggestions?


Thanks