Question about Akai PDP4294 42 in. EDTV-Ready Plasma Television

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Capacitors... Which Caps were the bad ones or should I replace all 4? Are they easy or hard to replace and where would i get the replacement caps??? I see two 1200microfarad and two 330microfarad caps...

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  • courtneyw75 Aug 04, 2008

    Ssme prob, where did you find capacitors?

  • jc2rock Aug 11, 2008

    This is the problem where the tv turns on (hear the click), red light blinks 5 times and no picture or sound. I see that the board under the input/output boards is getting power because there is a green lighth flashing in there.

    While looking through the other posts it seemed apparent that my power supply died and more specifically the capacitors on the power supply board. Another post said that figured out which caps were bad but I need to be sure before I order/replace them... I also got the schematics for the ps but not very good at reading it.

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What problems are you having?

Posted on Aug 07, 2008

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I have a hisense hl55t40pzln3d tv and it keeps turning itself off and on...how do i fix this?


there are two major possibilities:

1. The motherboard. Not that common, but happens.

2. The power supply. Fairly common, usually bad capacitors.

If you don't feel comfortable working around relatively high voltage, you may not want to mess with it. But it's actually not that dangerous, so long as you don't go poking your hand around the power supply, or something like that.

The first step is to open it up and do a visual inspection, specifically looking for bloated or popped caps on the power supply. Popped caps can be replaced pretty easy, just look for a tutorial online.

If nothing looks visibly bad (no visually bad caps, nothing burnt) then start checking voltages using a multimeter. Remember, a capacitor doesn't need to look bad to have failed.

If you get bad voltage, and replace the caps, try replacing the voltage regulator.

If all the voltages check out, and there are no failed caps, it's probably the motherboard, and, unless it's something simple and obvious, god help you.

Mar 03, 2015 | Hisense Televison & Video

1 Answer

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

2 Answers

Model FLM-3701 will not power up.


There is a fuse on the power supply board. It is labelled F1. It is a small cylinder near the AC connector. The F1 fuse is 5A 250V. How ever, capacitors are more likely to fail on this television.
The Polaroid FLM3701 has a problem with capacitors failing on the power supply board. If enough caps go bad, you will get no power. Not even a power light.
This P/S board is easy to access on this TV. There is a cover on the back of the TV. It is attached with 8 screws. Remove the cover. This will expose 2 boards. The power supply board is on the right. To remove the P/S board, first unplug the cables. There is an AC power power cord on the right and 4 data cables on the left. The board is held in with 4 screws. Remove the screws and the board will lift out. Any capacitor that is swollen is bad. The top of the capacitor will be curved upward. On the left side of the P/S board, there are 9 big caps labelled E8 thur E17. I would suggest replacing all of them. 6 are 680uF 35V and 3 are 680uF 25V. In the upper central region there are 3 small caps. These go bad, but they do not swell. These are E6, E7 and E22. They are all 22uF 50V. Replace all three. The attached photo shows before and after the caps have been replaced. The original caps were orange. The replacement caps are black.

model-flm-3701-will-not-power-up-1onojclnad5aenzciu2mb45v-1-0.jpg

model-flm-3701-will-not-power-up-1onojclnad5aenzciu2mb45v-1-1.jpg

model-flm-3701-will-not-power-up-1onojclnad5aenzciu2mb45v-1-3.jpg

Dec 07, 2011 | Polaroid Televison & Video

1 Answer

Tv wont turn on please help!


I have seen several of these with multitude of bad capacitors, I have replaced as many as 40 caps in one tv. Specifically 200mf caps 16 wvdc on the digital board. 1000mfd 25 v caps on the power supply, I can bet dollars to donuts you have an avalanche of bad caps in this set. Has probably been taking longer and longer to start lately ? If you open the tv look for the tops of little battery shaped items ( electrolytic capacitors) the tops or bottoms may have swelled out. I have even found them to have popoped their tops right off, you find a wrapped paper looking device where the cover used to be. some are easy, this one may be tough! Joe

Jul 11, 2011 | Akai LCT3201AD 32 in. LCD Television

1 Answer

I have a sony sxrd 50inch tv. i am getting 4 blinking red lights. The tv turns on then turns off and blinks 4 times.


I had a similar problem with my 42 in Philips LCD HDTV.



Here was the problem. My Power Supply Board had several bad capacitors. I opened my TV (warranty was expired of course) and found four bulged capacitors. Many electronics companies were sold capacitors that failed in 2-5 years instead of 10-20. The capacitors fail prematurely due to a lack of preservatives. Unfortunately, they were installed in all sorts of devices and cause a wide range of failure problems.


Here are some options for you.

1. Have it fixed by a professional

2. Open your TV and find PSB. Check for faulty caps. If you find some (bulged or leaking) bad caps replace the entire board.

3. Remove and then replace individual faulty caps. This takes some soldering skill.

Caps are inexpensive and if you can take care of it yourself it will save you hundreds.


I have a tip/tutorial on this site that may also help. It gives step by step instructions for replacing caps on PSB #715t2432-2. If this is your board you are in luck. It's called: Fixing the Philips Turns/shuts off on its own problem.


Hope this helps and Good luck.


Kaufman605

Dec 12, 2010 | Sony Televison & Video

1 Answer

Instead of replacing the Capacitors may be is better to check the the amount of current by loading each one of the capacitors. In my dell E193Fpc the capacitors don't look swollen. The question is what is...


That will take more time than repalcing the caps, bad caps can have high ESR, to measure current discharge during the AC discharge cycle of 50~100KHz each power supply will be real hard unless you have very low Z AC amp meter that has frequency response higher than 100KHz and not introduce resistance in series with the cap, if you look at the rating of ESR (PANASONIC fm/fc series cap made for switching power supply, it is in milli Ohm range. Better off replaceing 50 cents parts or use good cap meter that can do leakage, ESR, capacitance test if you want to analyze the caps, shop time will be too expensive. Just my 2cents adn 30 years of experience.

Basic LCD monitor troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Oct 23, 2010 | Dell E193FP 19" LCD Monitor

2 Answers

I have OptiPlex SX280, processor runs at 100 % for few minutes and the PC reboots. I have cleaned the fans in the case? What could be causing the PC to reboot.


Hi Jerrvk, These Dell SX280's are plagued with bad capacitors, Afewtr about 4 or five years of use the capacitors star6t5 budging and leaking electrolytic acid, The only fix is to hace the Caps replaced on the motherboard. We jsu got a whole load of these last week and are replacing the caps on the ones that are fixable. If you know someone that works on electronic this fix is really inexpencive. The Caps cost between $.60 to $1.50 each. Find someone that know how to solder real good, Have them inspect your motherboard, They will see the caps that are buldging on top. The ones under the hard drive are usally the ones that go first. Good Luck and let us know how you make out. pc_techserv

Aug 11, 2010 | Dell OptiPlex SX280 PC Desktop

2 Answers

Not turning on at all


check your power supply. remove it then remove the metal plates on top of the psu. ill bet you find 2x 1000uf 35V ,4 x 1000uf 10V and 3x 670uf 35V capacitors that are swollen or leaking. if you replace the 1000uf caps it will work but if the 670uf caps are swollen as well its a good idea to replace them as well. the 1000uf capacitors can be bought at radio shack for around 10 dollars. you can use the 1000uf 35V caps for the 1000uf 10V caps if you cant find the 10V ones . the 35V caps are a little bit bigger but still work . you will need a good soldering iron (35-60 watts) and a good desoldering tool . easy to do if you know how to solder.

Jun 29, 2010 | TruTech PLV16320 Television

2 Answers

My samsung lnt4065f quit working we took back off and found two capacitors are swelled, is this easy to fix it myself?


Yes it is easy to fix...the capacitors can be found at your local radio shack. Remember when replacing electrolytic capacitors, if you cannot find the exact uf and v specs, you can go higher in both uf and v specs, never go lower as you might blow the caps again. I have done several samsung lcd monitors and i replace all the electrolytic caps on the power supply board, exception being the 1 or 2 high voltage caps (200v or 400v). Make sure you keep notes as you remove the board, so that you can put it back together correctly. In my experience, it's only the caps needs replacement! Good Luck!

Aug 21, 2009 | Televison & Video

2 Answers

Monitor power light is blinking .but monitor is not displaying anything after 4 hr monitor blinking light is become slow and when restart the monitor is displaying after 4 hr please help me


We had the same problem with a Princeton VL1918 19" LCD monitor. Usually its a capacitor problem. If this is the case you might need to take the monitor apart look on the power board for the bulged capacitors and pull the numbers off of the caps. Go to a radio shack or find an electronics store in your area, get a soldering gun a soldering vaccum bulb and a wet sponge. Make sure you plug the right post into the right hole before you solder it. There is a Negative and a Positive on the caps. The wafer board should say where the negative whole is, also the capacitors on the board will show a negative side. Just use a pen or a sharpie mark for the negative posts, there may be a few caps that may be bulged. On the Princeton I just fixed it had three of the same capacitors 470uf at 25volts. Make sure you get the right caps or you have the potential to mess your monitor up even more than it already is. Inspect all your caps on your power board, Im sure there will be some rather larger ones and some small ones, if they look bad or you even suspect them of being bad REPLACE THEM. Capacitors are CHEAP so replace them if you suspect them of being bad. Solder new caps onto the board and then clip the extra cap posts. A note on safety. PLEASE BE SAFE DESOLDERING OLD CAPS. They can be charged in some cases. Just don't cross the posts when desoldering. The new ones that are packaged should not be charged but safety first ALWAYS assume a capacitor IS charged at all times! You will live longer if you take that approach!

Jun 10, 2008 | X2Gen MG19MY 19" LCD Monitor

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