Question about Samsung LE40R74BDX 40 in. LCD Television

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Got a samsung le40r74bd,when i switch on it takes five to ten mins and there is a continual ticking .could this be the power supply board takes 10mins to 30mins to switch on and also a ticking noise

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Posted on Jan 02, 2017

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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

  • 41 Answers

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

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SOURCE: sound but no picture samsung le40r74bd

Your mainboard is damaged, replace it and that will solve your issue.

Posted on Jun 06, 2009

Cool_dud 09
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SOURCE: power supply board

Please check on will find it out!

Posted on Aug 23, 2009

  • 1 Answer

SOURCE: Samsung power supply & IP board BN44-00264B &

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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I had a similar problem with my printer, though it not the same model (CLX-3160) but the same manufacturer Samsung. I took mine appart and found that one of the capacitors on the power supply had failed. It was blown and the top of the capacitor popped open. I am not saying this is your problem but it would be the first thing I would check if you want to get this fixed. Otherwise, look for a new printer.

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When i turn the power on the tv clicks for up to ten min before the picture comes on. is this fixable?

Yes,very fixables.Ur tv power suppply board have these parts call capacitors.They are dead and gases leakages,not total,but dying.These capacitors they alway bulges up on it top,puff up on it top,these capacitors are dying,that why tv still have power but it take up to ten min. clicking to recieve power to the rest of the tv.The power supply board,that the board where the power a/c cord plug into it.U have basic understanding of electronic's?U have tools,soldering iron,desoldering pump,solders?Take the tv aparts.U just looking,searches all around the power supply board and replaced these dead,dying capacitors that are bulges,puff up on it tops.Replaced these gases leakages capacitors,ur tv will have it power back to normal and work on the first click.Or tries websites like, to buy a whole refurbish power supply board for the replacement.

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sounds like the backlight is out, can you see a picture when shining a flashlight on the screen. if yes you have either a bad inverter power supply or bad screen (panel).
both are serious , also could be just a few bad capacitors on the power supply, if you want you can do a visual of the power board caps will appear swolled on top and are easy to solder in cost about $1 EACH

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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

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