Question about Sony Bravia KDL-40Z4100 40 in. LCD TV

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My sony kdl40z4100 will not turn on. It worked normally yesterday. I checked power cord, surge protector, as well as the cable box. The remote works, but the TV will not power up.

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Try leaving the TV unpugged for 30 minutes so the TV can reset itself.
If that doesn't work, most likely the TV has a power supply related problem. The most common thing to go out is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board.
I can't say it's 100% the problem because I can't actually look at the tv over the internet.
If by chance the TV is still under warranty, go that route.
If not under warranty and If you have some electronic experience, you can purchase a Service Manual over the internet and diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, test points, and part# lists. Usually, cost under $20.

I hope I shed some light on the subject for you.

Posted on Jun 29, 2009

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Posted on Jan 02, 2017

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Sony Bravia built in DVD player wont accept the discs - why is this?


Performing a power reset
1. Turn off the television.
2. Unplug the television power cord from the electrical outlet.
3. Let the television remain without power for 60 seconds.
4. Plug the power cord back into the electrical outlet.
NOTE: If the television is plugged into a power strip or surge protector, remove it from the power strip or surge protector and plug it directly into the wall outlet. If the issue is resolved, the problem is with the power strip or surge protector and not the television.
5. Turn on the television.
How to establish an HDMI connection between a TV and other device.
Follow the steps below if the HDMI® connection between your TV and other device is not working:
1. Make sure both the TV and other device are turned on.
2. While turned on, unplug the power cords for the TV and device from the electrical outlet.
3. Disconnect the HDMI cables from the TV and other product.
4. Wait 60 seconds.
5. While the HDMI cables are disconnected, plug the power cords back into the electrical outlet.
6. Turn on the TV.
7. Re-connect the HDMI cables.
8. Turn on the HDMI-connected product.

The TV should now detect the HDMI signal from the connected device and operate normally. If there is still a problem, disconnect the HDMI cable from both products and then reconnect it in the opposite direction. In some situations this has been reported to resolve connection issues.
How to reset a TV to factory settings: https://us.en.kb.sony.com/app/answers/detail/a_id/61396
Hopefully this post helps you! If does, please mark it "accept as solution"

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Do a Power Reset.
1. Turn off TV.
2. Unplug the power cord of the TV from the electrical outlet.
3. Let the TV remain without power for 60 seconds.
4. Plug the power cord back into the electrical outlet. (If the television is plugged into a power strip or surge protector, remove it from the power strip or surge protector and plug it directly into the wall outlet. If the issue is resolved, the problem is with the power strip or surge protector and not the television.)
5. Turn on the TV.
If issue persists after doing the steps, reset the TV to factory default settings.
1. Turn on the TV.
2. Using the supplied remote, press and hold the UP arrow button.
3. While holding the UP arrow button press the POWER button on the TV itself.
4. When the TV goes off, release the POWER and UP arrow button.
5. The TV will turn on by itself and the initial setup screen will be displayed. Just follow the on-screen prompts to finish the setup.
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Get a surge protector for your most loved systems, that way the worst case scenario is you will need a cord replacement. Unplugging it when it's not in use may also cool it down.

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Hi,

The best you can do is,

Turn off the PC/Laptop
Disconnect the USB cable from Camera to pc/laptop

Disconnect the power cord connecting the pc/laptop and the wall jack or surge protector
Disconnect the power cord connecting the camera to wall jack or surge protector

wait for 5-10 mins

Connect the power cord of PC/laptop and turn on the pc/laptop and login to your PC
Connect the power cord of Camera to wall jack or surge protector

Connect the usb cable or camera to PC/laptop
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Regards,
Shawn


* Please rate this solution with Thumbs up and Testimony to help us improve providing support

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Before you actually replace the power supply, check some other things first:
1. Wall socket
2. Power strip/surge protector
3. Power cable
4. On the back of the computer, where the power cable plugs into, is the red switch set to 115? It should be 115.
5. Make sure that the power cable is not connected to a regular extension cord. Power cable must plug directly into a surge protector that is not daisy-chained to another power strip, surge protector, or normal (household) extension cord. Surge protector must be directly plugged into wall socket.

If none of the above solve the problem, open up the case and ensure that all power connections are secure. Also check ALL other components' connections. Any loose connections can cause problems for you.

If everything is secure and the problem persists, replace the power supply.

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Follow these steps to troubleshoot the television not turning on:

Make sure the AC power cord is connected securely to a working wall outlet.
NOTE: If the television is plugged into a power strip or surge protector, unplug it from the power strip or surge protector and plug it directly into the wall outlet. If the issue is resolved, the problem is with the power strip or surge protector and not the television.

Press the POWER button on the television.
Press the POWER button on the remote control that was supplied with the television.
NOTE: If the television turns on and off using the POWER button on the television but does not respond to the POWER button on the remote control, troubleshoot the remote control.

Unplug the television power cord from the electrical outlet for 30 seconds.
Plug the power cord back into a known working electrical outlet.
Attempt to turn on the television.
IMPORTANT for the following models only:

KDF-E42A10
KDF-E50A10
KDL-V26XBR1
KDL-V32XBR1
KDL-V40XBR1
Unplugging the above television models from the electrical outlet may only be a temporary fix. The problem may reoccur after several months of use. To completely resolve the issue, a software update is available.

For all other models, service will be required if the troubleshooting steps do not resolve the issue.

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If the television is plugged into a power strip or surge protector, remove it from the power strip or surge protector and plug it directly into the wall outlet. If the issue is resolved, the problem is with the power strip or surge protector and not the television.

Please make sure that the videos sources are connected properly to the TV.

Try Power Resetting the TV.

Please disconnect the power cord from the wall outlet (for approximately 1 minute), then reconnect the power cord and check whether the issue is resolved.

Also try connecting the TV to a different wall outlet and check if that helps.

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Change the batteries on the remote, point the remote at the Sony, and hold in the power button for 5-7 seconds. Then depress and re-press the power button - see if you can get the tv remote to respond again.

Then, always try the quick reset:
How to perform a power reset on a Sony® television.
  1. Turn off the television. IMPORTANT: For a projection television that uses an internal lamp, wait 5 minutes after turning off the television to allow the lamp to cool before continuing with the following steps.
  2. Unplug the television power cord from the electrical outlet.
  3. Let the television remain without power for 60 seconds.
  4. Plug the power cord back into the electrical outlet. NOTE: If the television is plugged into a power strip or surge protector, remove it from the power strip or surge protector and plug it directly into the wall outlet. If the issue is resolved, the problem is with the power strip or surge protector and not the television.
  5. Turn on the television.

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