Question about Astar LTV-2701 27 in. HD-Ready LCD Television

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It's not turn on and no green light

I opened and look at it . I see burn Power supply board
you know where i can order power supply show me , please

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Re: it's not turn on and no green light

I just finished replacing all 25 or so of the electrolytic capacitors on the power supply board of an LTV 2701 AStar TV. When I got done, the tv came back to life and WORKS GREAT. Every last electrolytic was either leaking onto the board or puffed up or both. The main problem is that Astar designed the case so that no air can circulate over the board and the capacitors bake after a couple of years. If you don't do somethig to let the air circulate, you will be replacing them again in 2 more years. The board is pretty sturdy however and its fairly easy to replace them all with some copper desoldering braid and a 125 watt soldering gun. Just be sure to keep the polarities right on the electrolytics and make sure that they are the 105C variety. Good luck and remember to add some fans and cut some extra holes in the cage.

Posted on Feb 17, 2008

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My TV will not work. I'm trying to turn on TV with comcast cable remote which I been using for awhile. The green (power) light keeps flashing and making noise and the TV does not come on. It has no...


The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.

The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board. You might be lucky it's just a blow fuse. Also a defective transformer can cause your TV not to power on.

All these can be checked on the power supply board.

But more often bad capacitors causes problem on the power supply board. I do not think the power board needs replacement, rather those defective capacitors is causing this issue. Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.

The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)

You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.

What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).

You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like ""(look for electrolytic capacitors). After replacing these capacitor(capacitors) most likely the normal operation will be restored. Or you can by a refurbished complete power board to save you some stress from

Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.

If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.

I hope this helps.


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Have a problem with Zenith 37 HDTV. Medel number: Z37LZ5D As wathcing TV, along with 'pop' sound, TV went dead. LG service center gave an advice to unplug the power cord and press ON/OFF power switch about 1 min. Then plug power back and turn on the TV. Well, the green light blink for a while and solid green, but still no screen, no audio. Search the Web and someone suggested to replace Power Supply Board which will fix the problem. Again, search the Web and came out with Power Supply Board. LG Electronics/Zenith 'Power Supply Assembl' with $124.95 from Is it the right solution? Do I have to replace entire Assembly Board? not just replacing some fuse? Any cheaper way to do? If I have to replce PSA board, any suggestion to how? Comment posted on Apr 22, 2009 I have a basic knowledge of electric and electronics, such as rewiring entire house for renovation and assemble entire computer from scratch.
Actually, the TV belongs to my father and the problem that I stated was based on what he told me.
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This is LCD TV.
There is no problem with the wall socket nor current.
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It has to be internal problem.
As I mentioned on the main post, there was a 'pop' sound while watching and TV went dead.
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