I have a Sony Bravia KDL-46EX720 approximately after 6 months of use one night there was a thunderstorm and the phone line burned down the network card in my laptop and the modem and my (connected by ethernet cable to a router), the other day I turned on my TV (that night was off but connected by ethernet) and the following occurs:
Shows the Sony logo lights and sound on, then put a black screen (with backligth) and so takes 30 seconds and turns off and on again it does 4 times and then completely shut down and display the standby LED blinking 8 times.
I have searched many places the meaning of the 8 blinks in some places say it is the flyback on other sites is the sound, I guess it's the card that BATV is the one connected to the network card, even if I turn on and light of the router port connected to the TV is turned on.
I tried a power reset power button (to power on) top arrow hold click and release power button and nothing happens I also tried to enter the service menu and nothing the only text that shows the TV is the Sony logo. Try also boot with a flash drive with the firmware but I guess if I do not see the menu much less going to update the firmware. The TV before damaged automatic updates and was connected directly to a router, I had a ups so I do not think it is for the line voltage.
On Ebay I found the card very cheap BATV but not if you buy it because I'm not sure that is. I've been offline for over a month (I hurt the November 7, 2011 has been two months now) and I connected and still the same.
Of course it takes you guarantee that you buy from amazon U.S. and the warranty does not cover it in my country and the Sony service is almost as expensive as the same TV.
Here I made a video with the TV behavior
I would appreciate any information or assistance. thank you very much.
Joined: Mar 13, 2003
From: Sewell, NJ
Posted: 2012-01-10 14:47
For the KDL46EX720, 8 blinks, pause, 8 blinks, etc. of the red standby light means WDT (watchdog timer) as described below:
SUBJECT: 8 Blink Error Code
1. TV shuts down with an 8 blink error
2. 008 error code not in the service SELF CHECK list
3. 103 error code registers 8 blink error is in SELF CHECK list
8 blink could be caused by one of the following issues:
1. Software Issue
2. Network Issue
3. Skype Login Issue
4. Incompatible USB Device Plugged Inserted
5. Defective Main Board
8x blink code is mainly used during TV software development. Look in TVís service SELF CHECK for error code history and notice at the bottom of the list WDT (Watch Dog Timer) error codes, in particular notice 103 HOST_WDT.
Every time 3 errors are registered in the SELF CHECK screen the TV will shut down and activate an 8x blink pattern on the Red Standby LED.
To Troubleshoot perform the following steps in the order shown:
1. Step 1
a. Disconnect All Inputs to the TV
b. Cycle AC Power (unplug the power cord)
c. 8 blink still occurs, go to Step 2
2. Step 2
a. Completely Reset TV using Remote Control
b. While Pressing and holding Arrow Up, Press and Hold TV Power Button (on side of TV) and then Release Arrow Up
c. 8 blink still occurs, go to Step 3
3. Step 3
a. Check for latest Software Version through Network Connection or Reference Library
b. Connect and Configure TV Network Connection
c. Using Remote Control Press HOME > Settings > Product Support > Software Update
d. If TV is not network connected go to Reference Library and Download Latest Software for the Specific Model and Install using a USB Thumb Drive.
Thank you very very much for your reply. In fact I have made every step minus step 4 to replace the BATV board. Step 3 I can not do the only thing that shows me is the Sony logo, I can not go to any menu.
Now a question, the BATV Board used by my tv is used by several television models. On eBay selling BATV Board models that correspond to my TV but belonged to a different model of TV, if I replace my board for one of these will work or I have to find one that have the same firmware that my tv.
Joined: Mar 13, 2003
From: Sewell, NJ
Posted: 2012-01-11 15:11
The Sony part number for the BATV board is A-1814-572-B. If the boards that you are looking at have that part number, they should work. Otherwise, no. You may purchase the part for $169.88 at https://servicesales.sel.sony.com/ecom/accessories/web/index.jsp. Use the Part Number search to locate the part. To access the Part Number search, click any accessory category and wait for the next page to appear. A new search option will appear at the top right. Click the down arrow to select the Part Number search.
However, there is no guarantee that BATV board replacement will correct the problem. The instructions that I provided are for a qualified service technician.
i have a sony model KDL-40EX725 and this have the same problem "8 blinks after 3 resets when ai turn on the tv", this steps can resolv this problem?
thanks for all.
All logos and information in this site are property of their respective owner. The
comments are property of their posters.
This website www.agoraquest.com, Claudio Meira and Agoraquest, LLC is not tided in any form to the Sony Corporation
(www.sony.com). This unoffical website is just place where Sony products are reviewed among the general public. Sony is a registered
of Sony, Inc. "PlayStation", "PlayStation2", the PlayStation "PS" logo, and all associated logos/graphics.
"Agoraquest, LLC" and "agoraquest.com" are associated exclusively with agoraquest.com, and are NOT associated in ANY way with Sony
please click here. If you have any further questions, please contact using our online form.