How To Repair A TV That Won't Turn On | How To Replace A TV Power Supply Board | Sony KDL 40W5710

How To Repair A Dead TV | Dead Power Supply Board Replacement

In this YouTube video tutorial I will show u how to diagnose and repair a dead tv based on these specific symptoms for any TV.

This is the 40 inch LCD TV Sony Model KDL 40W5710

Warning: This type of repair does come with risk of electrocution and damage to your device or other related electronics. Therefore consult a professional if in doubt, or do at your own risk.

There is no power when turned on, no led lights whatsoever, no backlight (back light).

Please note for this type of repair, ie no power and no led lights, until you actually replace the faulty power supply there is no telling what else could be wrong with the TV. Once you repair the power supply then you can investigate further depending on the numerous other symptoms that may appear.

00:45 Amazon Affiliate Link

01:07 How To Test A Fuse With A Multimeter (Voltmeter | Ohmmeter) For Beginners | Continuity Test

07:12 Ebay Power Supply Board 1-878-598-11

10:53 The art of asking the wrong questions | How to ask questions in a technical forum

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Thanks for watching!

#howtorepairatvthatwontturnon #howtoreplaceatvpowersupply #howtorepairatv

[jackpitt]

Thank you for posting this video. I was going to throw out my Bravia after a lighting strike, replaced the Power board and all is good, saved myself £££. Keep up the good work matey 👍

[carloszapata]

That was a very detailed and very professional class! Thank you so much!

[C-Breezy]

Bro... your video gave me the confidence to give it a go with my lightning-struck, won't-turn-on TV - new power board, good as new. Thanks for the great info!

[janboterletter]

Very informative, you made something that looked so complicated very simple! Thanks!

[Jeph]

10:45..."if you want to ask a question..." but questions posted months ago go unanswered. I enjoyed this tutorial. I'd have replaced that huge black capacitor before the whole board, however, as modern capacitors are poorly manufactured junk components and are likely the power failure cause....and cheap!

[michaelhealea]

My 87 yr old Moms 2011 Panasonic 42" TV would shut off after a few hours of use. A red led light would slowly flash. The remote would not turn the TV back on?! I figured out that if I removed the TV's power cord from the wall, and plugged it back in, the TV would RESET. In the old days of computers, we would call that a "Hard Boot"! She would sit for hours staring at a black screen. Thank you for putting this simple step by step video together. We cant afford another TV, so THANK YOU for helping me! Michael Seattle WA USA!

[jacquesraymond]

Very simple and clear explanation.. top stuff

[mowtown]

Great vid thanks, please tell people however that the BIG FAT CAPACITOR in the middle has anywhere from 300 to 450volts in it even after disconnecting the power. If they handled the board immedietly after removing it, there is enough to cause shock.

[taneja]

Hi, very detailed video, nicely explained .highly appreciate it!! I had a question on my TV- I've a sony XBR65X850E which is not turning on, no power on the screen (black) when I plug in it makes a squeaky noice from inside. I tried to reset couple of times from power but no help, is it a faulty power board problem or something else?

[vincentcarbone]

EXTREMELY well explained and helpful. Thank you for posting this tutorial.

[jankoria]

Good Video Why did you not trouble shoot the PSU Board ? Make it more Intresting.

[manstersr]

Thank you, now I have to go test my DC voltage. My TV is a 110v US model KDL-40V5100 manufactured in May 2009. It doesn't have the fuse in the plug like that Euro model. There was a near lightning strike that took it out. I tried to check the fuse that is on the power supply board and it ohms out at 0 ohms but I'm not sure if it is correct since It's not removable without desoldering it. I checked the voltage to see if it comes through it and it does have 110 (117actual) volts on both sides. The 3.3vdc is present all the time it's plugged in. One Question I have is about my standby/power LED at the bottom of the front panel. It will come on if I unplug and plug the power cord back in but still a black screen. When it is plugged in I hear a relay clicking like it would do when I powered it on before the lightning. Only, it's is a double click and the the standby/power LED comes on for 12 sec. then goes off for 4 sec. and then it cycles again repeatedly. Does that mean I need to do anything different or test anything else than what you were explaining and testing for?

[badger]

I learn so much from you. Thank you. Love light and peace

[bbc]

Very easy to follow video, Thankyou . Subscribed

[gordon]

Well presented video, found it via a link from The Guardian.

[melissaoday]

We replaced the power supply board with a brand new one. Tested it with a voltage tester on DC and should show 5 amps and it doesn't. The old one did the same. Do you know what the problem might be from here? There is power going in from the plug but not power going out to the mother board. Like I said the old one did the same so I am guessing it must be something else. Any suggestions?

[garyredmond]

Hi samsung 32in I have measured all outputs coming from the power Supply and all measures good...Now Shopjimmy had sent me 3 diff main boards and didn't work.. they indicated those were defective and gave up after that, gave me a refund...I have diff T-con board inplace.. going back to the main brd..should I buy from somewhere else?? or give them another shot?? when I disconnect PS from main back lights light up I have ck'd my cord and ok... seems liike I have isolated to the main brd else can I ck
TY

[stevenrogersfineart]

Its such a shame that such a huge board cant just be fixed. I guarantee its probably a blown capacitor or something simple. That circuit board is so huge and DOESNT use SMD components. It SHOULD be cake to fix :(

[kpatel]

Hi, I've got a Sony Bravia KDL-40EX503 that turned off on it's own, but the red standby light flashes twice. Could this be power supply issue? I've tried soft reset and factory reset, still get the same result. Any ideas please?

[ahndrayyuhh]

would each tv model have the same reference number? for instance if anyone had the tv your referenced in the video will they be looking up the same power source board that you referenced in the power board in the video?