Question about Samsung LE40R74BDX 40 in. LCD Television
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Posted on Jan 02, 2017
SOURCE: samsung le40r74bd LCD TV
hi is the power still coming on? if yes no need for power . have u put anntenal & change the chanels b4 then to see if sound will come .if ye s its yuor backlight inverter u can also disconet ur inverter plug & power on the tv & change channels if works change ur inverter if dead change your ad or mainboard .
for replacement , lcd parts .com. will help
Posted on Nov 10, 2008
SOURCE: sound problems
Sounds like there is a bad solder connection inside the set and needs to be looked at by a tech. The Flashing LED usually will be a code for the tech to send him in the right direction as to the problem. Try counting how many times it flashes and call them or manurfacture. hope this helps
Posted on Apr 01, 2009
For anyone else with this problem...I ended up getting a replacement transformer from ebay and swapping it out myself.
You have to remove the back panel of the TV, unplug the board from the harness going to it, unscrew the board (both via the set of screws going directly through the board and the set going through the plastic piece on the opposite side that, as far as I could tell, the board is glued to). This plastic piece (running the length of the board) has receptacles for the backlight bulbs, so be gentle getting it in and out. Don't forget the screw in the middle of the board.
De-soldering was a little tricky. My soldering skills are not great, so maybe it was me. But it certainly seemed to be a little challenging to get it all out. Having so many terminals probably didn't help (a capacitor would have been easier). Eventually though, I did get it out. Soldering in a new one was easy. Be sure to check continuity between the terminals of the new part and other parts of the board using the traces as a guide once you're done.
After that, simply re-install the board and put all hardware back in. Like I said before, be sure you re-engage the receptacles of all the backlight bulbs by pushing down at each notch on that plastic part of the board.
Hope this helps someone else...
Posted on Dec 19, 2011
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