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Still no power from power supply after replacing cap's

I replaced 20 Cap's on power supply but still no good. This is the 3rd one I have done and the other two work great. (to bad the customers have the other 2 back) any case any ideas would be great.



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Samsung ln26a450 Takes 20 min to power up

Fault to the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

May 30, 2015 | Televison & Video

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Wont turn on when u press on off button it just goes click click clickc

Go to EBAY and look up a capacitor repair kit for your model kit. They cost $20 to $30. This is to fix the power supply board which is the middle board. Be sure to note polarity of the capacitors you replace. There is a positive and a negative on them and that must be observed. Use a magic marker and mark the top of each cap as you replace it. Replace all caps supplied in the kit even if old ones don't look puffed out. This should fix your power supply. I did this on a friend's set over a year ago and the power supply is still ok.

Dec 11, 2013 | LG 50PC3D 50 in. Plasma Television

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LCD TV won't turn on- power light flashing

This is a very common symptom of a failure in the power supply board. The failure is caused by parts called capacitors. Here is a link to information on what needs to be replace on the power supply board to repair it. It is an easy repair, takes about 20 minutes.

Jul 21, 2012 | Toymax Magnavox 37MF231D 37 in. LCD TV

1 Answer

Do you still have parts for the RCA DRC8030N, I am looking for both power boards, I have replaced the hard drive and also the DVD drive. I still get the hello message, possible the power supply...

There's a good chance you have failing electrolytic capacitors either in the power section
Any caps in that look bulged at the top, or bulged/leaking at the bottom need to be replaced.
This may save you from having to replace the power supply boards.

Match the capacitance on the capacitors. Go over voltage if you can, and still have them fit.
IE - it's not a bad idea to replace a 10V cap with a 16V, but don't replace a 680uF cap with a 500uF or a 1000uF (unless you are positive it's only doing ripple filtering).

Mar 01, 2011 | Televison & Video

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Popping sound and then the picture went out no sound makes a crackling sound and the blue led light just blinks


The sound you heard is probably a cap that has blown on the power supply. On plasma tv's some times you can hear the buffers pop but you said this is an LCD and that is USUALLY a blown cap.

The good news is power supply boards can be found on ebay. Or if you have a local electronics guy he can replace them. Sometimes a blown cap just happens, and sometimes its a sign of bigger problems so I tend to replace the board.

If you are comfortable you can take the back panel off, find the power supply board and look for caps with DOMED TOPS or BLOWN OFF TOPS. And then you can be sure. In most cases the power supply board is easy to find, the power cord plugs in to it.

PLEASE PLEASE dont put your fingers where they dont belong, and if you dont know what you are doing call someone who does. No tv is worth calling 911 to get your heart restarted.

Best wishes

Nov 25, 2010 | Televison & Video

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Standby light blinks, no picture. Takes between 5 and 10 minutes for picture to "come on"


Jun 21, 2010 | Samsung LN-T1954H 19 in. LCD HDTV

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My Samsung is delaying turning on

Reason for your problem is that there is not proper power being supplied to the tv. Solution- on the power supply there is 2 capacitors 1 of which is exploded already. You would need to replace those with new ones. spotting and exploded cap, good caps are flat on the top and bad caps swell out.

current cap- 10v 2200mf
replace with -16v 2200mf or 25v 2200mf
repair will include soldering.

Apr 27, 2010 | Samsung SPN4235 42 in. Plasma HDTV

1 Answer

Standby is just flashing

this is a common problem, you may have a bad power supply, if you know what are you doing open the TV and look for bad caps in the power board, replace any open cap and will be done !

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Maganovox 37'' power button not lighting up anymore.

Set your volt meter to the diode check and measure across the white fuse [power off and unplugged],Shuld read zero. Then the fuse is good, an open fuse will have no reading. If you replaced the sure the voltage is the same or greater. The Mfs must be the same...and most importantly be sure they are 105dgrees. In some cases they could be 125 degrees. If you replaced them with 85 degrees you will definitly not get a good start up. And always be sure you check the polarity on the caps to the board. The board should show a plus or minus. The long leg on a new cap is always positive. Locations for the caps I believe are2074 which is 25volt 2200Mf and cap 2081 is 35volt 1200Mf and a third cap 2066 at 16volt 10Mf. Be very careful with cap 2066 as the trace on the board can be damaged when you unsolder this! Good Luck!

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40" samsung wont power up after switch-on

Best guess is filter capacitors in the power supply. Easier to just replace entire board unless you have a cap meter and solder equip. Do a search for the part using model #. Good luck, Russmann.

Sep 09, 2009 | Televison & Video

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