With my Sony Bravia 46" xbr the screen keeps cutting out. I'm usig hdmi cables and can't find a reason why te tv keeps cutting out. The sound still remains but picture doesn't. Not even out technician can find out what the problem is

I'm sorry to hear that you are having issues with your Sony Bravia TV. It sounds like you have already tried a number of troubleshooting steps, including replacing the boards and performing a software update. If you have no picture on the TV and the Sony logo is flashing on the screen before going off, it could be an issue with the software on the TV. Here are a few additional troubleshooting steps you can try:

1. Disconnect the power cord from the back of the TV, then unplug the TV from the wall outlet. Leave it unplugged for at least 60 seconds, then plug it back in and try turning it on again.
2. Check the HDMI connections on the back of the TV to make sure they are secure.
3. If you are using an HDMI cable to connect the TV to a device (such as a cable box or DVD player), try using a different HDMI cable.
4. If you are using a cable box or satellite receiver, try resetting it by unplugging it from the power outlet for 60 seconds and then plugging it back in.
5. If the TV is still not turning on or the picture is not coming back, it could be an issue with the software on the TV. In this case, you may need to try a factory reset. To perform a factory reset, follow these steps:

• Press the Home button on the remote.
• Select Settings.
• Select Product Support.
• Select Customer Support.
• Select Factory Reset.
• Follow the on-screen instructions to complete the factory reset.

Keep in mind that a factory reset will delete all of the data and settings on the TV, so you will need to set it up again as if it were a new TV. I hope these steps help, and please don't hesitate to ask if you have any further questions.

This TV does not have any speakers.
What are you connecting to?
https://docs.sony.com/release/specs/KDL40XBR9_mksp.pdf



40 BRAVIA XBR Series LCD TV

If the line is Horizontal then you deffinantly have a cable issue, replace the cable and that should do it, if it continues the problem could be in the port itself, if using HDMI switch to VGA or composite to test this theory. please keep me posted.

you need to replace defective capacitors in the power supply of the tv

Sounds like the tcon (timing control) board. Sometimes unplugging the LVDS cables from the tcon, cleaning and reconnecting solves this. The catches on the LVDS cables are easily damaged and must be handled carefully.

make sure that your pc is shutdown(off) when you plug the hdmi cable in your tv. First, plug hdmi cable into tv and turn on tv. Next, power up pc and it should see your tv. There should be an option on the pc to set the output a projector.

A short fix is to unplug the hdmi cable and shut down the tv compleetly, then get the tv on and plug it in, the tv see the new connection and reset the value's for sound

You did okay but the phono sockets are not for Computer/TV use. Phono sockets should be checked int the manual on why they're there. If you have connected the Bravia to your computer, using the appropriate cable, then you should also purchase or request from the retailer where you purchased the TV a cable that has stereo phono plugs and, you didn't say what size phono sockets they are but I presume they are 3.5 mm. So, if the TV has 3.5 mm sockets, you purchase a cable with stereo 3.5 mm plugs. This is adequate for the stereo wav sound coming from the computer and going into the TV. Remember, having 2 Phono inputs on the TV doesn't mean anything. The TV could have a number of video inputs too, ATD AVT, AV, COMPONENT1, COMPONENT2, HDMI1, HDMI2, HDMI3, etc. each have it's respective sound inputs for AV, S-VIDEO, DVD, Blue-Ray, etc. But for the computer there may be a different type of socket for it's sound inputs, normally it is the old phono sockets. Seek help from the retailer or else you could cook the circuitry of the TV's sound system.

Had the same problem with mine. Took off HDMI cable and used the HD cable (Red Blue and Green) for video and standard (red and white) cable for audio.
Problem gone

I'll buy your broken tv from you. I need some part to fix my own tv. Thanks. email me at lbarzola at gmail . com. Remove the spaces and change the at for an @. Thanks.