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Power board which caps do i need to replace..which ones on the board

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The capacitor kit with the correct values and rating for temp, ESR and ripple current is available here:
There is pictures for the power supply board with the capacitors that need to be replace shown marked.
I hope this helps,

Posted on May 01, 2013

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My vizio Model SV470M will not turn on the power indicator light is not on either.

First, are you capable to open and repair this?
Being a power issue, we work "out to in". Plugged in wall and Power is not out in the neighborhood are too obvious to ask. Sooo... next .. Once back cover is off, look for and test the fuse on the PSU (power board), also look at this PSU board and see if any caps (capacitors) are bulged or popped. Both of these will kill a board, and usually caused by cheap caps or power surges from the power grid. You can replace the fuse easy enough, but you need good soldering skills to do the caps, and a supplier for the new caps. REPLACE ALL CAPS, not just the obvious bad ones. Otherwise, replace the whole board. Since you mentioned a "No Power" issue, this should fix it. Transformers are not too easy to test, (trans may be "browned" IE: burnt) and chips.. forget it, for both, replace the board. Hope this helps

Jun 09, 2014 | Vizio SV470M LCD TV

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10 blinks on power light

You need to replace the blown capacitors on your PSB-power supply board. A soldering kit w/flux from harbor freight or radio shack and and about a dozen new Thru-hole caps about 2V higher than the ones your are pulling out.. Or if that isn't to your liking you can just buy a refurbed board on ebay shopjmmy or partsstore. You will need to remove the back panel and pull out the PSB disconnect a few wire harness and some ribbon cables and a few screws the board will pop right out. The board with be printed and say Power Supply with the REV number (part number) printed on it. That's the one you need to look for. If you want to replace the caps yourself you'll visibly see the blown caps they should be completely flat (X) top view no puffs or bulges. It's pretty simple to remove them and solder some new ones in.

Feb 12, 2014 | Panasonic TCP50VT25 50 in HDTVReady Plasma...

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TV is dead. Power light is not illuminated. Checked all plugs and outlets.

It sounds like your power supply has failed. This could be caused by bad capacitors in the power supply itself, or it could be caused by some other circuit board, likely the Y-sustain or Z-sustain board, or both.

This solution assumes you feel comfortable working on the tv yourself - if not, it will need to be fixed by a service technician.

Begin by removing the back cover. You'll need to take out all the screws that have an arrow pointing at them. You'll only need to remove the large cover, not the smaller one where the audio/video connections are located. Put the screws in a plastic sandwich bag so they don't get lost.

The power supply board is in the center top area. Check the tops of all the capacitors. They should all be flat. If any of them are bowed out or deformed then you have a bad power supply board that will need to be replaced, or replace the caps if you're capable. If the caps look ok then check the fuse at the bottom right of the power supply board. Go to the appropriate paragraph below.

1) IF THE FUSE IS GOOD: you likely have a problem with one of the sustain boards. Unplug the connectors on the Y Sustain (Ysus) that sit between the two fuses. Plug in the tv and see if the power supply board comes up. If it does you'll hear a click and see the green light on the front begin flashing. This indicates one or both of the sustain boards has failed.

To determine which board has failed, reconnect the Ysus connector from the power supply and disconnect the connector at the top left of the Zsus board. Try turning on the tv. If the power supply comes up then you have a problem with the Zsus board. If it doesn't come up you have a problem with the Ysus board and/or the Zsus board. The power for the Zsus board is routed through the Ysus board, so if the Ysus board is bad you won't be able to check the Zsus board.

Many blogs recommend replacing both if one is bad because they're both high failure items, and replacing one without the other means you may have to go back and replace the other after a short while.

2) IF THE FUSE IS BAD: You may have a problem with the power supply board. Check the caps for any deformed tops. If so, you'll have to replace the board or the caps, depending on your skill level. After making the replacement, disconnect the power to the Ysus and verify you have a good power supply board.



Jun 23, 2011 | Zenith Z50P3 50 in. Plasma TV

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Picture distorted goes red in color after 1 hour

Most likely the problem is bad capacitors on the video module of unit.If you take the back off you should see basically 3 circuit boards-Power Supply,Main Board,T-Con Board.Inspect the main board and the power Supply Boards for bad capacitors,in most cases the bad ones will usually have a bulge on the top of the capacitor,a normal cap will have a flat top,if you find any of the caps have a slight or big bulge,as if they were getting ready to explode,they need to be replaced with the same microfarads and voltage rating which is printed on the side of each cap.Replace them one at a time,you will need a soldering gun ,solder and solder wick to properly do the job.You can find all the tools you need at your local radio shack.The solder wick is used to extract the old solder so you can put a new cap in,the caps will have 2 legs.Also you must look at the cap and line up the negative side of the cap to the negative symbol on the board,there should also be a plus symbol where the cap goes in on the board.Good Luck and let me know if you need more information.

Mar 27, 2011 | LG 42LC2D 42 in. LCD HDTV

3 Answers

I have one view sonic va1912w-4 monitor. No power from 2 days. So i can checked power cable but problem is not rectifide.What can i do check next step.

Its either going to be the power board or the main board, My assumption would be the power board since those are the more lilely culprits to go out on those monitors.

Since neither one is readly available, check the fuses on the power board and then also see if there are puffy caps. If there is then replace them with ones that are the same UF rating and same or highter voltage.

Apr 21, 2010 | ViewSonic VA1912wb Monitor

1 Answer

Lcd tv stuck on standby works when you apply heat not sure what caps to replace.

Check the caps on the power board, if there any signs of liquid coming out of the caps or if they are not flat at the top and domed or pretruding they will need to be changed. The power board will be the board that has the mains lead plug on it, check it thoroughly and you will see the ones you need to replace. any problems post back.thanks.

Feb 02, 2010 | Sanyo CE22LD94DV-B 22 in. LCD TV/DVD Combo

2 Answers

My samsung plasma suddenly made clicking noises and tuned off

I wish to tell the world about the simple cheap fix for your plasma! . Please let me know if I helped. I have a 50" Plasma that deicded after a year it didn't want to turn on anymore. It just blinked red LED. Which made me see red! It took me a year to find this inexpesive fix I hope this information will be helpful to you.... These are spendy items and none of us were thinking that after a year (seems like a scam to me) the TV just won't turn on anymore.... Then they say your no longer covered under warranty or you are and they send you to some repair shop 1-2 hours away and always and I mean always tells you the part is on back order.

Lukster is right it is a power supply problem. However you don't need a new board nor do you need to pay someone a ridiculouse abount of money to fix this. I fixed mine for 40 cents.

You more than likey have bad capacitors.
Unplug the TV from power. Remove the back cover. (some models require a star srewdriver) You power supply board is right in the center. A bad cap is bulgded or raised. A good one is flat. caps have an X on the top of them. More than likely you will see a bulding or just straight raised edges on the X on the top of the caps. Cap 3300uf 10v is the ones you are looking for. Once you find them replace them with 3300uf 16v caps. If one cap is not raised replace it anyway. These caps need to be a higher voltage that why the tend to pop. 16V is plenty, don't go any higher in voltage than that.

The caps need to be soldered on. You have 2 options do it yourself or unplug all the wire harness from the board then unscrew the board take your power board (dont forget your new caps) down to a pc repair or tv repair and have them solder them on for you. It will take less than 10 minutes. I do recommend putting the board in an anti static bag. You can buy these caps at radio shack or buy them on ebay.

After you get it repaired replace your board plug all power supply wire harness back onto the board (I recommend numbering the wires as you remove them), replace the back panel cover. Plug her in and fire her up. and BAM it works. then turn it on and off a few times in complete amazement at how simple and inexspensive this was to do. Then get angry cause your repeated calls to tech support was wasted breath.

Semper Fi

Dec 16, 2008 | Samsung HP-R5072 50 in. Plasma HDTV

1 Answer

Mitsubishi wd-52628 flashing green timer light

If the power/timer led is the one blinking constantly
the most likely problem is two 3300 mfd caps and 1 to 8 1000mfd caps on the power board.
could be the DM board or caps on it as well.

Jun 17, 2008 | Mitsubishi WD-52628 52" Projection HDTV

7 Answers

Astar LTV-3001 30 inch

It's easily to fix the problem. Just replace the buffed capacitors on your power supply board.

Dec 03, 2007 | Astar LTV-3201 32 in. LCD Television

2 Answers

Monitor light blinking

Some monitors blink 2 different collers and that means that their is no video signal and some monitors will blink real fast.This is caused by a power cap going bad.If this is happening you need to take appart the monitor and look for a power cap that has stuff leaking out of it or one that has a loose connection to the board or one that is bubeling on the top the power cap.The top of the power cap should be extremly flat.(here is the problem their could be a bad power cap and it might not be showing any signs of going bad).You will need to replace the cap.You can go to radio shack or fry's and they will usually have the parts for cheep.You will need to know the voltage and the pecofarrets.The voltage and the pecofarrets are usually listed on the cap.For example 350 voltage and Fu 4.5 (Fu standing for pecofarrets).You will need to remove the old power caps by applying heat with a soder gun to the under side of the board.Make sure you know which prong on the power cap is positive and which is negitive as the cap is polarity concious.(usually on the doard under the cap it will say + or -.The longest prong on the new cap will be positive).Once you have identified the bad cap or just replaced and removed them all you will need to use a soder gun and soder to atach the new power caps to the board.After sodering cut any acess langth of the prongs off and reasemble the monitor.Now hopfully the monitor works.

Oct 11, 2007 | LG Flatron 563LE 15.1" LCD Monitor

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