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Re: SanyoDS25390 Tv good picture buzzing noise
What are you using as a source? If its a cable/satallite box, double check that first. If its a video input or a scart input, swap out the cables. If it still there you could have an input problem or a filter capacitor going bad. Does the hum get louder with sound? If it does it is an input source and or cables. Good luck
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In some cases the buzz is external. The vibration of the unit may just cause a tray, flat surface, or other surrounding attachments to rattle and buzz. Look for anything that may be loose or laying on or about the TV.
Had this problem as well. Ran through a laundry list of possible solutions. Finally found that the key is to increase the backlight (Access via [Menu] [Picture] ) to 100% and the noise goes away. If this is bad for the life of the backlight, just pray the backlight burns out inside year 1 while the warranty is still valid!
I have this tv aswell, and yes I will confirm that it does buzz quite alot, but all plasma tvs do, it is to do with how it renders images, the buzzing can be made worse by it being close to a wall and it reflecting back. I found that my tv stand some how amplified the buzzing when i got mine. I dont think its something you can escape.
Mine i notice also when scrolling around menus seems to have lines that follow your selection....not to pleased about that
blue screen is the noise mute screen. however the audio is not getting muted and hence the buzzing....meaning the tuner on the TV is not getting locked on to the station/frequency
1. check your antenna if you are using one. Autotune
2. Reconnect coax from the cable box to Tv and autotune.
3.Use the Video out from the cable box and connect it to one of the video inputs on the TV. Switch your Tv to that component. Use the cable box to change channels (Best case scenerio)
It works fine for a couple of minutes the starts to hum. If you turn up the volume it masks the noise but is till audible, also the video switching cuts out. after examining the components I have seen some heat discoloration in the power suply area and believe it to be power for the video board. disconecting the ribbon cable form the video board the hum goes away, and so does any video wich does'nt matter for me because my monitor does all the HD video switching. hope this may help with some noise problems.