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Power Supply does not work constantly

Power Supply "AELTA" S/N AXF00629023512. Problem: "on and off" every 60 seconds and the picture shows normally.

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Turn on TV and picture and sound are great for about 60 seconds. Then the picture disappears but sound remains.


I would start with checking the power supply 12vdc output, make sure it is stable with no ripple. If the power supply checks out fine, I would then suspect the main board.

Sep 20, 2012 | Vizio VT470M 47-inch 1080p 120Hz 5ms LCD...

1 Answer

My Magnavox TV give sound but no picture. When I turn it on the light in the bottom right hand screen goes green, then flashes to yellow and goes back to green. The screen does not change it is constantly...


You need to replace your backlight inverter.

Check that all voltages are coming from the power supply as they should. The power supply will be stamped with the correct amounts, and you just read with the multimeter to confirm.

After those check out ok, you will need to replace the inverter to "light" your screen again.


You can hear sound because the tv is ON, but the inverter isn't lighting the screen!


Hope this helps, please rate!

May 11, 2011 | Televison & Video

1 Answer

After a few hrs. the picture and sound flip out. unplug and wait a few seconds it will work again. but then does it again shortly.


The tv a/c power cord unplug,replug it back tv work normal again for awhile.There ur answer the tv power supply board is the causes and the problems.That the board where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

Apr 27, 2011 | Vizio L32 32 in. LCD HDTV

1 Answer

Turn TV on and no picture but sound. Turn it off for about 5 seconds and it works fine. Also ... amber light constantly stays on. is that normal?


That is not normal, more likely to either to have power supply failure or the back light inverter failure.
If you are going to DIY and have proper tools and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com

Jun 28, 2010 | Vizio GV42L 42 in. LCD Television

1 Answer

Shows picture for a second when i press button than goes dark


Issues with back light:
Please do not attempt to diagnose if no competent.
Do at your own risk.
Check for 24 Volts power to the inverter board
No Power---Check Power Supply
Power Present---
Verify status voltage 3v to 5v on inverter board harness (plug)
Replace Inverter Board

Feb 11, 2010 | Tatung V30DMTT 29.6 in. LCD Television

1 Answer

When i switch tv on, it shows picture for 5 seconds then goes into standby. the tv is a vistron ltm-3271e lcd


The problem is associated with the power supply that cannot run under load. The showing of picture for a brief period of time indicates that the main board, ballast, inverter and panel drive are all OK. The unit turns on but the power supply cannot sustain the power requirement of the unit and shuts down.
The usual culprit on the power supply are blown or bad capacitors. Check the power supply for such capacitors. If no apparent damage or defect is found, replace the power supply.

Nov 07, 2009 | Televison & Video

1 Answer

Samsung plasma - no picture


check the power supply board for blown/bulging capacitors
you should see 4 bad ones on the top left

Jun 12, 2009 | Televison & Video

1 Answer

Picture and Sound flash from 'on' to a black screen


Hi, The problem lies within the unit. You have a hardware failure within the board. The power supply board needs to be repaired or replaced. If you are a handy person, you can easily swap the power supply board.. If not, bring it you to local reapir shop, they will find the parts and replace it for you. I wish I had a better solution like an easy fix for you. Sorry, but on hardware failure, there is no easy fix. Thanks, Mike

Nov 02, 2008 | Panasonic TH-37PX60U 37 in. Plasma HDTV

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