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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.

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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

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1 Answer

What is the going price for a power supply on this brand T.V. and how can I be sure its the power supply?


If the power light comes on when you attempt to turn the set on and the goes off, do this:

On the front of the set press and hold both the Menu and Input buttons for at least 5 seconds and then release both.

Power light will blink a two digit error code like: 2 blinks, 2 blinks, a pause and repeat it four more times.

Let me know what error code and I will tell you what it means.

If this told you something you did not know, rate this solution as very helpful as I do this here for free.


SD TECH

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Green light comes on


Most Mitsubishi sets have a feature known as error code operational check. First up unplug the set and replug it. Press and hold the "Device" and "Menu" buttons for 5 seconds. You wil see a series of blinks a 1/2 second pause and another series of blinks. COunt the blinks before and after the pause and let me know. If its an issue other than power supply then you should get an error code. Power supply is the only thing that the operation check does not check.

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Swollen ( bad ) caps in power supply first place to look.............T.

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ja it cud b tha power supply to be sure
1. take of the powersupply out from tha machine
2. on the conector to tha mother board(on tha power supply) connect a small wire on green n blak (sam tymz it burst)
3. connect tha power cable
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inside the pc there should be a green light. called flea light. if its not on.. then id say motherboard or power supply are bad.
take power cord off. and hold power button down for 10 ecs. then reconnect and retry. i think its abad psu.

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