Question about Samsung Televison & Video
The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main 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. Pull up older posts. http://electronicshelponline.blogspot.com/ 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.
Search the site by type in the "brand name" to your device; in the "Search box at the top right of the display window of the Homepage" to get gathered related posts. ..
Posted on Dec 09, 2016
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Posted on Jan 02, 2017
SOURCE: viewsonic n3251w - no power
A lot of TVs are having their power boards go bad due to a poor brand of capacitor (CapXon usually).
If small problems are noticed with the tv, the solution is to replace the capacitors. However, once the TV gets to the point where there is no power at all any more (not even a stand-by light) then the power supply has to be replaced.
Visit Viewsonic's website or call your local Viewsonic repair shop to get a price on this board. They are usually under $100.
Posted on Nov 26, 2008
there is 3 capacitors close together on main power board that will have raised tops if there is more replace all with same ones e.g (2000mf 25v) and make sure the white line is on same side take picture to help
hope this helps
Posted on Dec 13, 2009
Testimonial: "I agree that the bulging capacitors are generally the issue, unfortunately I I can't get soo lucky all the capacitors looked fine. Thank you"
It would be a lot cheaper if you just replace the two caps that have gone bad. Just get a cheap solder pencil from the store and about an inch of solder and you are in business.
The Power Supply Board is the center Board (towards left) after you remove the back off the TV. Remove Board from TV with the 6-7 screws. Replace capacitors CM852 & CM853; 2200ufd 25volts.
Thaks for using FIXYA, BIG IRISH.
Posted on Jan 02, 2010
In almost all cases where the set is taking a long time to turn on and then turning off it will be the Power Supply board that will have bulging capacitors, usually three to five. Look on the upper right side of the Power Supply and look for any blown caps. You can replace these caps and you will be fine. Now the other cause can be the Power Switch is shorting out. You can disconnect the the Power Switch but not the IR sensor and then turn ON the set with your TV remote and see if this stops the problem. If you are not skilled in component level repair on the Power Supply board then buy a new Power Supply board and install it.
Posted on Apr 16, 2010
Apparently this is a known problem with flat panel TVs made a few years ago due to bad capacitors in the power supply. This same problem appeared in computer mother boards at about the same time so that the capacitors went open or shorted causing problems.There is videos on You Tube that addresses this problem see: http://www.youtube.com/watch?v=ZccykxrtX9g as a starting point and look around for other repairs
Posted on Jan 25, 2011
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