Question about Samsung LN32C350 32 in. TV
Sometimes can turn on tv and work fine for hours, sometimes turn it on and after a few minutes the picture becomes bright white then after a minute or so turns black with purple around the edges. Sound is normal Had tv over a year now. Also when going to video options to try to change the brightness or darkness it suddenly becomes dark.
Trying with a DVD will rule the tuners in the set in or out and also suggest a setting in the set or a box if used is causing this issue.
Posted on Nov 06, 2012
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Posted on Jan 02, 2017
It sounds like you have a bad slave inverter board. I've fixed a few of them with the same problem and it's always been this board. With the back off of the tv, it will be the board located all the way to the end where the problem is. It will have several wires going from it to the screen. You will probably have to get the part number off of the board to be able to find one, as I couldn't find one by using that model number.
Posted on Sep 02, 2010
SOURCE: when i turned the tv
Youy may have bad T-CON, Power supply, LCD panel. PDF download: http://www.mediafire.com/?zzjygannjty Inside the TV:
Learn about T-CON/LCD panel failure mode:
Try this when the screen goes black:
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.
PDF download: http://www.mediafire.com/?zzjygannjty
Inside the TV:
Posted on Jun 10, 2011
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