Question about Samsung LN-S4692D 46 in. LCD HDTV
I have sound, but no picture. The same problem everyone is describing here. We have had the t.v. 21/2 years. So glad to read what everyone has had to say and the part number. We may have a repair person take care of it, but at least I will feel educated on the matter. Last Samsung for us! Thanks to everyone who posted. Great help!
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Posted on Jan 02, 2017
Your inverter circuits and/or power board need servicing.....
Either three fault scenarios are happening:
1. the inverter circuits are not producing AC ripple too the CCFL lamps that illuminate the LCD glass panel.
2. the power supply board is not feeding 24vdc - 12vdc sustain voltage too the inverter circuits. Meaning, no dc high voltage output from the power board.
3. The timing control circuit (LCD Board) has shorted switching devices or on-board memory has failed....which causes data/dc loss at the input which results in the inverters canceling load power (lamps). The sync data between inverter and LCD Board are absent. This will result in a 'NO LIGHT' condition on the LCD display.
Number 3 is a rare case, its usually #1 the inverters need servicing.....
Posted on Nov 10, 2009
The back light inverter board may have gone out or it is not getting the 24vdc from the power supply module. Start checking for voltage feeding the inverter board.
Posted on Jan 07, 2010
If you apart out the power supply board,backlight /back light module,main tuner board and universal wall mount kit.
You can get up to $320.
I'm in California and I can get the WHOLE broken LCD TV for $50-$85.
Part it out and get few bucks.
Posted on Mar 05, 2010
Testimonial: "Thanks, great advice."
You can call 1-800-samsung to find out if your unit is covered under a special warranty for this problem. A couple of capacitors have failed on the power supply board and need to be replaced.
Posted on May 07, 2010
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