Question about Samsung LN-S4695D 46 in. LCD HDTV
I have two defined horizontal bars separated by about 12" of faint ghosting that rolls from bottom to top of my 46" screen. It is more apparent at times than others. But it's there. It's been seen by my cable provider, Cox. They've checked signal strength and it's A-okay. It's not always there, but I'd say about 60-70% of hi-def viewing. A salesperson at Best Buy called it a 60 cycle hum. I've been told it may be the power supply. Either the filter capacitors or the rectifiers have taken a dump. What do you think the problem is. I've got the extended warranty program.
If I may add to tech8's and shivam4529's posts, pls try:
1. Removing any and all other devices (such as a DVD, etc) attached/connected to the Samsung LN-S4695D 1080P LCD TV and only leave the cable connected. This would include the audio and video cables + any other wirings as well as their plugs to the mains. So in effect it would only be the TV and cable. Power up the TV and observe if the horizontal bars appears again. If no, please proceed to Step 2, if yes, please proceed to Step 3;
2. Plug in your other devices one at a time and determine at which point/device the fault appears. In so doing you will be able to single out what device is causing the horizontal bars;
3. If it is just the cable and the TV and you still have the fault, get hold/borrow an old VCR plus a known good clear VHS tape. Remove the cable connection. Hook up the VCR to the TV using the RF OUT of the VCR to the RF/ANT/Cable IN of the TV. Do not use the video/audio connections. Power both TV and VCR and insert/play the tape. On the TV, select either Channel 3 or 4 whichever will display the tape movie. Observe if the fault appears again. If not, please see 4, if yes please see 5;
4. Something is wrong with your cable. The signal strength might be strong/OK but it is dirty/noisy and that is where the 60cycle AC hum is riding in to your TV;
5. Then you need to make use of the extended warrant and claim/demand service. Be it the capacitor, rectifier(s) or the entire power supply, the unit would require service. Allowing somebody else other than their authorized service personnel to work on your unit would probably void your warranty.
Hope that this be of additional help/idea. Pls post back how things turned up or should you need additional information.
Good luck and kind regards.
Posted on Nov 26, 2007
1.A change in capacitance ot the main filter
capacitor is the usual suspect
3.ground loop in cabling system or house
4.open or changed capacitance of filter capacitor
in vertical output citcuit (lighter bars)
Posted on Nov 26, 2007
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Posted on Jan 02, 2017
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