Why do I have sound but no picture?
My Philips tv is around 2/2.5 years old. There is only sound, no picture just a black screen. What can I do myself to try a fix this?
First off you will need to give us a model number for your TV. There are a few things that can cause this. In general it is the mainboard that tells the power board to turn on the backlight for the panel. The main board is also the board where the video and audio are encoded, The signal then goes through the T-con board into the panel. Quick and dirty description :-)
Since you have audio , you know that at least part of your main board still works. Now, in a darkened room turn the TV to a station where you have audio. Shine a flashlight at an angle against the screen. See if you can make things out like silhouettes, menus etc. If so then you know it is your backlight (bad power board, bad backlight array). If you do not see anything then there could be an issue with the main board or the T-con board.
Of course there is always a possibility that this is a bad panel. Anyhow, let us know what you find. Also, if you remove the back from your TV, post some good pictures of the boards and the interconnect cables so that we can see what you see. 在已经存在的问题里加入图片
This is what I did: Press the Options button on remote ( the button has 3 vertical dots and 3 vertical lines), Got to picture style, Mine was on User, I switched it to something else. My Tv picture turned on!
You should check thed screen beacouse it is only the image that it is mising not the sound but unfurtunatly screens are no longer avalavle in publuc so you should take it to a factory repairment
Factory reset using remote. From home screen go to right pointing arrow in top right side of screen to settings and do reset at the bottom of the list. This happened to me because of a usb drive not properly ejected. Sound and picture is okay except live tv. I could watch my apps but not antenna tv. This appeared to be my only option.
The FIRST suspect for no picture would be the backlight. Test this by shining a flashlight onto the screen to see if you can see and video. If you can, then you have a backlight issue. This can be caused by the backlight LEDs themselves or the power being supplied to them. Now you must get inside to figure out what it is.
If you do not see any video, then it is potentially any one of the other boards. That elimination is more difficult. If you have a service manual, start with verifying the voltages from the PSU board. The follow troubleshouting steps to try to narrow the problem to a single board.
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