Sony Bravia KDL-40s2000


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Sony Bravia KDL-40s2000

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sabresfan
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Dec 14, 2015, 3:49 PM

Post #1 of 6 (2491 views)
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Sony Bravia KDL-40s2000	Can't Post

My tv went dark. It won't power on. The red standby light flashes 4 times. When I disconnect the board at the top (channel/volume/power) and plug it back in I can turn it on with the remote but the power button only stays illuminated for about 3 seconds then the standby light resumes blinking 4 times. If I plug the board back in and try to power on the green power button does not illuminate at all. Any thoughts?

jts1957
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Dec 14, 2015, 4:15 PM

Post #2 of 6 (2488 views)
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Re: [sabresfan] Sony Bravia KDL-40s2000 [In reply to]	Can't Post

http://www.tv-forums.com/..._username=&mh=50

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sabresfan
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Dec 15, 2015, 4:56 PM

Post #3 of 6 (2473 views)
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Re: [jts1957] Sony Bravia KDL-40s2000 [In reply to]	Can't Post

Thanks for the link, much appreciated. I did so a search before posting the question but I am not too technically savvy and was hoping for a
'simpler" answer like "your X board is bad, google this part number and replace"

jts1957
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Dec 15, 2015, 5:09 PM

Post #4 of 6 (2472 views)
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Re: [sabresfan] Sony Bravia KDL-40s2000 [In reply to]	Can't Post

Backlight Protection (4X Flash Pattern)
Reference Figure 3-2 http://imgur.com/qpHBLVN
This protection mode monitors the operation of the Backlight Inverter Board and the Lamps. The Inverter Board is the Lamp power supply, which produces the high alternating voltage necessary to drive the Cold-Cathode Fluorescent Lamps (CCFL) used for the LCD panel backlighting. There are three main causes for the activation of this protection mode.
• Loss of 18.5V supply to the Inverter Board (at CN6202 on the G2-Board)
• Loss of 3.2V Backlight ON signal
• Defective Inverter Board Circuits
• Defective Lamp(s)

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sabresfan
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Dec 16, 2015, 3:14 PM

Post #5 of 6 (2447 views)
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Re: [jts1957] Sony Bravia KDL-40s2000 [In reply to]	Can't Post

That is very helpful. I appreciate you taking the time to give such a thorough answer. Hopefully I can track down the correct part and get her up and running again.

thanks again!

jts1957
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Dec 16, 2015, 4:07 PM

Post #6 of 6 (2446 views)
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Re: [sabresfan] Sony Bravia KDL-40s2000 [In reply to]	Can't Post

Television repair DOES require SOME troubleshooting, especially when the cause can be more than one possibility. Unimpressed

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