Question about Sony BRAVIA KLV-40U100M 40 in. HD-Ready LCD Television

2 Answers

Sony bravia kdl40s20l1 lcd goes into standby mode ocassionally. It just started doing it. After it does it i unplug it and wait 30 seconds i plug it back in and it works. Although it is starting to happen once to twice a day. Can it be the bulb maybe? my old sony had the same problem and i called and they said it was the bulb. I replaced it and it worked fine afterwards. Thank you

Posted by on


2 Answers

  • Level 1:

    An expert who has achieved level 1.


    An expert that got 5 achievements.


    An expert whose answer got voted for 20 times.

    New Friend:

    An expert that has 1 follower.

  • Contributor
  • 35 Answers

Check the U24 (CPU reset IC) on the "A" board. It may be burned. If you have a DVM (voltmeter) check for 3.3V across SW1 connections near this device. If you don't have 3.3V, U24 is bad. This part is not available from Sony. The TV may work if you just remove U24 from the board. I posted this fix on Agoraquest also, you can read more there (I'm "Roundabout" on that forum). Hope that helps

Posted on Apr 11, 2010

  • 2 more comments 
  • xSonyTech Apr 19, 2010

    Syomak, the U24 chip is very small, has three pins (one on one side of the device, and two on the other) and is located near the very large CPU "Genesis" IC on the 'A' circuit board. It's sort of halfway between the Genesis chip and another chip marked as U5. You have to look at the board very closely to see it. It's very tiny and you could overlook it easily. It looks like a surface mount transistor. If you have any more questions, just post back here. As far as locating the actual part for purchase, good luck with that. Sony refuses to supply it, preferring instead to sell you the entire board.

  • xSonyTech Jun 25, 2010

    Syomak, everyone that has responded to me on Agoraquest and Techlore forums regarding my fix for this problem have reported their set is working now with U24 removed. No one has attempted to replace it yet, and my own set is also still working fully. I found a replacement from an IC manufacturer (see my post on Techlore for more info) but haven't installed it yet, and may not until (or if) the TV stops working. Why worry about it if the set works fine? It won't harm the set in any way to run it without this chip.

    Glad you got your set working. Many others have too, since I first posted this fix over a month ago.

  • AmyJoe Jan 15, 2011

    Hi xSonyTech,
    I have a 40" Sony Bravia KDL-40S20L1 that the screen went black with 4 blinking lights after it is turned on for about 30 minutes. I opened up the back but do not see a Genesis CPU on the AUt board or other boards like QT, QS, BUon the unit. I downloaded the service manual fom the internet and coul dnot find any reference to the U24. The service manual has a reference on the first page being a WAX2 chassis and Remote Commander = RM-YD005. Not sure if I have the right manual but it does apply to model KDL-40S20L1.
    I am not technical at all but I tried look for U24 with a magnifying glass but could not see a chip with that mark on it.
    I appreciate any suggestions you may have. Thank You - AmyJo

  • xSonyTech Jan 16, 2011

    AnyJoe, This fix only applies to the KLV-32U100M and KLV-40U100M sets. I don't know why it appears on this page with both the KLV-40U100M and the KDL-40S20L1. If you notice at the top of this page, it has both model numbers, one is in gray and one in bold type. Sorry, I don't know about the model you have, it may be something totally different causing your problem. I would suggest looking on Agoraquest or Techlore for a fix in your case. Do a search on both sites, and if you don't see your issue listed, register on one or both and ask if someone can help you.


  • Level 1:

    An expert who has achieved level 1.


    An expert that has over 10 points.


    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 5 Answers

I have same tv but i cant locate u24 part

Posted on Apr 14, 2010

  • Syomak May 01, 2010

    thanks man i did it and its working( i didn't replace it i just took it off.) i when on digikey and found part that may fit there perfect. but im not sure.At another hand if its will be helpful i bought a refurbished board off the ebay and it had that chip replaced( i could see it it was resoldered and they used apoxy on top so you cant see what numbers. i took apoxy off and could read numbers of it K7WB or K7W8? its hard to read they scraped it to.



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

My 15 month Celcus LCD423D913FHD tv will not turn on. The standby light is lit and will flicker but will not power up the tv. What is the likely problem?

Fault with its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Oct 20, 2014 | Televison & Video

1 Answer

Sony bravia KDL40S20L1 Lost complete video. Still have audio.

First, unplug all wires/cables from the back of the television including the power cable. Then plug the power cable in and using the power button on the television, turn on the tv and hit the menu button on the side of the television. I

f you have a menu, it could be a simple fix (meaning there isn't a bad board, etc).

You could also use the remote control to try to enter maintenance mode to see if the screen works.

Make sure if your remote has four little white buttons under the power button, select TV

With the tv plugged in and OFF (this is standby) press the following four keys in order within a second of each other.


When the screen comes on (even if black) press the JUMP key quickly once or twice.

if you see a menu, the boards should be okay. If not, might be a little expensive or you didn't press the buttons in time.

In general, if you see a menu on the screen, the lcd board and the electronics involved with making a picture should be okay and it might be loose connections

Mar 04, 2013 | Televison & Video

2 Answers

Sony Flat

Goes from on to Standby by its self because of protection mode that activates for some internal problem. Do you see standby light blinking on tv front? What is model number of your tv? How many times standby light blinking after 3 seconds long pause? Let me know to find out possible cause of problem.

Jul 25, 2010 | Sony BRAVIA KDL-40S2010 40 in. LCD...

1 Answer

The standby button is flashing twice- sony bravia klv-40v550a

Unplug the power cord for 30 min, plug back in and turn on.

Should ths not work seek repair or replacement

Apr 10, 2010 | Sony BRAVIA KDL-40S2010 40 in. LCD...

1 Answer

My Sony Bravia KDL-40S2000 keeps powering off by itself and going into standby mode. I have to unplug the tv and wait at least a minute to plug it back up and it works for about 11 min. and goes back out.

Problem may be the power supply,check in it thoroughly and find the falty components.Remove the faulty one and replace new one.
Such as components may be diod,capacitor,power booster.If you are able to do your self other wise take it to the workshop.

Dec 31, 2009 | Sony BRAVIA KDL-40S2000 40 in. LCD HDTV

2 Answers

40'' Sony Bravia goes into standby with the light blinking 9 times

I finally managed to solve this problem by unplugging everything - scarts - HDD cables - power etc and left it for an hour. When I turned it back on again the problem had sorted itself out.

Sep 30, 2009 | Sony Televison & Video

1 Answer

Standby Indicator flashes red 6 times between 2 second intervals

My TV (Sony Bravia LCD KLV-32S310A) goes of after 20 seconds when it is switched on. The standby indicator then flashes (red) five (5) times then there is a two seconds break followed by another six flashes then two seconds break etc. What might have caaused this and what should i do?

Apr 13, 2009 | Sony Televison & Video

1 Answer


THREE Blinks
B+ over voltage protection (OVP), unit goes to the standby
mode then displays the 3 blink fault. This is also a problem in the power
supply circuit, check T603 and R672.
FIVE Blinks
AKB circuit (AKB), the timer/standby indicator blinks for about
30 seconds then goes to the self-diagnosis function. Something is wrong with the video. Check video out, Q705, 732, 761 and other components on the C board, also check Q218, 219, 220 on the A board. Also unit be in IK blanking,
try turning up screen slightly.

Jun 19, 2017 | Sony BRAVIA KDL-32S2000 32 in. LCD HDTV

Not finding what you are looking for?
Sony BRAVIA KLV-40U100M 40 in. HD-Ready LCD Television Logo

1,549 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sony Televison & Video Experts


Level 3 Expert

102366 Answers

The Knight
The Knight

Level 3 Expert

74185 Answers

Jerry Greenberg
Jerry Greenberg

Level 3 Expert

1667 Answers

Are you a Sony Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides