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Failed power supply

I have 2 of these and both power supplys have failed. tha set comes on for 5 mins and then goes off, i am told its a problem with these tv's i am unable to get a replacement power supply or repair??? one guy changed the ic's on the board but it made matters worse.
Please help. a shame to bin them.

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  • rogersailes Nov 21, 2008

    yes sorry its an acoustic soloutions 19" lcd tv/dvd ASTVD 3119WS

    Many thanks.

  • brianfields May 11, 2009

    Similar to the previous fault, but power comes on and stays on but no picture. Pressing MENU button and shining torch on the LCD shows a faint display of the MENU information on screen. This shows that the logic and general power supply is working. It also tells me that the INVERTER section of the Power supply is not working. Checked the tiny SMD 5A fuse on the underside of the PSU board. That's OK, then it's the switched mode circuit for the 32V to the inverter part of the power supply board. I don't know if there is a repair kit for this but would appreciate any help as to which components to change.
    Any idea where I can get a cct diagram? Thank you


  • May 11, 2010

    How about a make and model number?

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Hi I have an acoustic solution 19 in tv with dvd player ASTVD - 3119 .
I can seem to get the menu off the screen it appears each time i change channel or press any button at all on the remote.can you help me please

Posted on Sep 19, 2010

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The power light will come on for about 18 seconds then goes off and then comes back on and goes off etc.


It sounds like your power supply is cycling. Check power supply output and replace. I've been told by a TV repairman that the power supply (and motherboard) in smaller sets is the same as yours.

Oct 29, 2013 | Sanyo 42 in. LCD TV

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Vizio 42", have picture for about 5 mins then screen goes black.


also check the power cord wire coming from the back of the tv is loose from the tv side or perfect.

Oct 26, 2008 | Vizio Flat Panel Televisions

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I have a PDP 503 mxe that when you switch it on the stand by red light comes on. when i then press the remote to switch it on the grenn light comes on for a few seconds then goes out. the screen fails to...


That problem is usually have 2 causes..Its either power supply board or main board..

Please take this steps on how to determine the problem:
1. Open the back cover.
2. Check the power supply output...It should have 5vdc for the main board..12vdc or 16vdc for the audio and 24vdc for the back-light inverter..
3. If those 3 voltage supplies have encountered voltage drop...The problem could be on power supply board..
4. If the power supply output is normal..The problem could be on the main board...
5. If the problem is power supply you should check if the capacitors are bulged on the top and try to replaced it..If you can't do that you can purchased new power supply board..
6. If the problem is on main board there is no D.I.Y repair on that so you need to buy a new main board that fits to your TV..
Hope this solution will be helpful..

Thanks for using fixya...

Jun 06, 2012 | Pioneer PureVision PDP-503MXE 50 in....

1 Answer

My tv set automatic video/picture will disappear after 5 min but sounds remain. i off the tv set then on again but after 5 min it dis appear again pls help tnx a lot


you lose brightness but sound remains?

I see so many here with no sound/nopicture issues:

ISSUES:

1. IF sound main fuse/s are good.
2. If no power or standby check main fuse, standby power supply and any signsof damage you can see---burnt parts etc.
3. almost all these sets the troubleshooting involves checking voltages on the main power board to narrow down theproblem.
4. Be safe and if you do not know what you are doing don't open the set.

Answers to issues:

1. RE:fuses---if a blown fuse is found get a good replacement(not the genericones like Radio Shack). Many fuses are special even aside from amperage--Don'tput a higher rated amperage fuse in the set for any reason.

2. RE: power supply in set: if total dead aside from main fuse the set uses astandby power supply that runs 7/24 and a main supply (some are combined andsome not.

Here aside from checking fuses you want to examine all the filter caps on thepower/standby to see if any are puffed up or buldged up in some fashion--Iattach a photo of a good one---top should be silver metal and PERFECTLY flatand have no brown material coming out on top or bottom.

What happens in the standby area is they use caps with too low a voltage rating(saves money) which causes them to fail in a year or two---the standby runs7/24 and the heat dries out the caps and they fail.

3. Trouble shooting consists of the above and then at some point you have tobuy and try a board to see if it fixes it or not.

4. Safety first--no TV set is worth getting injured or even killed over.
3_31_2012_2_58_31_pm.jpg

Mar 31, 2012 | LG 32LE5300 Widescreen 32 in. HDTV

1 Answer

Lg lcd module le5300


A general answer:

I see so many here with no sound/nopicture issues:

ISSUES:

1. IF sound main fuse/s are good.
2. If no power or standby check main fuse, standby power supply and any signsof damage you can see---burnt parts etc.
3. almost all these sets the troubleshooting involves checking voltages on the main power board to narrow down theproblem.
4. Be safe and if you do not know what you are doing don't open the set.

Answers to issues:

1. RE:fuses---if a blown fuse is found get a good replacement(not the genericones like Radio Shack). Many fuses are special even aside from amperage--Don'tput a higher rated amperage fuse in the set for any reason.

2. RE: power supply in set: if total dead aside from main fuse the set uses astandby power supply that runs 7/24 and a main supply (some are combined andsome not.

Here aside from checking fuses you want to examine all the filter caps on thepower/standby to see if any are puffed up or buldged up in some fashion--Iattach a photo of a good one---top should be silver metal and PERFECTLY flatand have no brown material coming out on top or bottom.

What happens in the standby area is they use caps with too low a voltage rating(saves money) which causes them to fail in a year or two---the standby runs7/24 and the heat dries out the caps and they fail.

3. Trouble shooting consists of the above and then at some point you have tobuy and try a board to see if it fixes it or not.

4. Safety first--no TV set is worth getting injured or even killed over.
3_24_2012_4_20_26_pm.jpg

Mar 24, 2012 | LG Flat Panel Televisions

1 Answer

Akai PDP4204 has no picture. When its plugged in a flashes 5 red lights. Someone told me its the power supply i have checked some of the things that people say go bad on fix ya. I also was checking the...


Plasma and LCD TV sets are prone to having capacitors in the power supply section fail. This is the most likely cause for the probem you describe. When capacitors fail your will commonly see one or more of the following symptoms.
  • No video, Power light is on or blinking.
  • TV is making a clicking noise.
  • TV takes a while to come on
  • Screen is very dim or flickers.

Again, You can get a power supply repair kit with the parts, detailed instructions, and support from sites such as www.TvRepairKits.com . Or just click here to see more details on their kit.

Here are pictures of capacitors...Notice that the ones below look bloated. They have failed and will need to be repalced.



ecollier2012.jpg
Capacitor being replaced! Fairly easy DIY fix.

ecollier2012_0.jpg
Again, You can get a power supply repair kit with the parts, detailed instructions, and support from sites such as www.TvRepairKits.com . Or just click here to see more details on their kit.

May 09, 2011 | Akai PDP4294 42 in. EDTV-Ready Plasma...

3 Answers

Screen goes blank aftert 10 mins sound stays on though, wont come on again till been switched off for ages, and then picture still only 10 mins then sounds stays on again


when the TV goes dark, shine a flash light on the screen- hold it very close.
if you see a little bit of the image, your backlight has failed. That would mean you would need to replace the LCD panel.

Apr 13, 2011 | LG RU-27LZ50C 27 in. HD-Ready LCD...

1 Answer

I have a RCA L32HD32D, will be on for 1 to 5 min. later goes off


check secondary power supply. check capacitors and apply fresh solder.

Jun 01, 2009 | RCA L32HD32D 32 in. LCD HDTV

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