Question about Televison & Video
You need electronics repair experience and proper tools.
First, look at the screen in darkened room to see if you can see any slight glow from the screen, if it does, then the problem can be the T-CON (not getting the 12vdc) or the main logic board not feeding the signals to the T-CON board.
if not, next place to check will be the power supply module, make sure it has 24vdc which is required by the backlight inverter to work, the reason for not having 24vdc can be from bad DC filter caps (leaking/bulging top, high ESR) or short circuits in the inverter board which will cause the 24vdc supply to go into shutdown mode, so you may have to disconnect the power cable that feed the inverter board to see if the 24vdc will work without the inverter board hookup, you will need to apply about 3~4 amp of load to the 24vdc to make sure it can handle that. There are fuses on the backlight inverter boards also. So there is some troubleshooting you will have to do to find out the causes of the problem you are having.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:
Basic LCD monitor and TV troubleshooting guide:
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
Posted on Mar 28, 2011
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Jul 07, 2016 | Televison & Video
May 01, 2016 | Samsung Televison & Video
Dec 10, 2015 | Sceptre E465BV-FHDD 46" 3D LED TV...
Dec 09, 2015 | Televison & Video
Aug 23, 2015 | Proscan 42LA45H 42 in. LCD TV
Nov 05, 2013 | Coby 40 TFTV4028 LCD TV
Mar 16, 2011 | Insignia 42" LCD Flat-Panel HDTV
Jun 18, 2010 | LG 50PG20 50 in. Plasma HDTV
Jan 31, 2010 | Televison & Video
Jul 21, 2018 | Televison & Video
24 people viewed this question
Usually answered in minutes!