Question about Televison & Video
12VOLT AND 5 VOLT LINES ARE PRESENT FROM POWER SUPPLY
Fault with its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
Posted on Dec 01, 2014
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Posted on Jan 02, 2017
Hello! My name is Ivica,and I am from Croatia.I have same LCD which have problem with motherboard.Try to disconect power supply from inverters and then measure all volt line.Maybe failure is on inverters board!Write me if you solve the problem,and maybe you know where can I find new motherboard for my LCD.Thanks.
Posted on Jan 24, 2009
found caps in power supply bulging so i replaced all electrolytes in power supply but TV still doesn't work when i hit the power button the power supply just ticks.
Posted on Jan 29, 2010
SOURCE: we have samsung LCD with
So the standby 5vdc is working but not the rest of the power supply outputs are working? Look for PS_ON signal (3.3~5vdc for ON) from the main board that feed the power supply board. You can tak ethe power supply moudule out the do bench test using 24v lamp attach to the 24vdc out put and feed the PS_ON with 3.3v to see if the 24vdc will turn 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.
Please post back what you find.
I have a feeling that the main board is damaged since the protection Diodes are blown, it may have taken out the processor.
Posted on Jul 01, 2011
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