What do the power supply voltages look like?...are they all normal, specially the ones feeding the panel lamps
SOURCE: LN-T4061f samsung lcd no backlight, no sound, no picture
Replacing the capacitors would be a good start. Replace all the ones with the same capacitance and voltage rating even if they do not look bulge.
Let me know if you require further assistance.
SOURCE: Black picture, perfect sound
hi...your convergence IC's have gone bad.
These IC's operate at a very high temp, and usually only last 4-5 years.
If you remove the back of the set, you will want to look for the
BIGGEST heatsink in there, on that heatsink, you will see 2 large IC's ,
probably STK392-040, or STK392-120's or something close...regardless -
you can go on ebay to order the new ones, but MAKE SURE they are
Genuine SANYO IC's and not counterfiet cheapies. the cheap ones may
only last 2 months..
You will also need some "Heat transfer paste" - you can pick this up at radio shack.
Once you remove the old IC's, test all the large resistors near
them.. pull one side of the resistor out of the board so you can check
it out of circuit. they will usually have the value in Ohms, printed
directly on the resistor, but you may have to use the resistor color
code to find out what value they are....However, usually if there is
any damage, the resistor will look like it has been HOT or fried.
replace the IC's and any bad resistors, and you should be good to go.
If after replacing the IC's and any defective resistors, the
convergence is still bad, make sure to use a multimeter to check ALL
fuses on the boards, --- sometimes when the IC's go, they will take out
a fuse to the convergence power supply. If you find any bad fuses,
replace them accordingly!
Hope that helps u alot...
thank u!!!
SOURCE: I have a Samsung LCD TV Model LN-S4692D. I lost
You might want to try reseating all of the ribbon connectors that connect to the tcon first, but it sounds like you may have a bad panel(screen) which is probably what made the original tcon die. The only other possibilty would be the backlight inverter board(either the master or slave depending on which side the dark area is on).
SOURCE: Samsung LN-4665F 46 in. LCD Television has negative picture showing
Check and replace the T'Con board. It is faulty. Visit this site for more details. The site name is (Electro-help). Just type in
"electronicshelponline.blogspot" into the search box of your browser, and click
search. You can see a site by this
name. Pull up older posts there.
Sometimes, ads related to each post might give you details about the
availability of spare parts and price.
It is a blogspot site, in English Language.
SOURCE: samsung ln-t4665f has black screen red light blinking checked caps none bulging what should i do
The power supply is most likely shot and need replacement. Swelled caps are only a issue some of the time most power supply issues are either a transformer, Regulator or diode problem. You can get free technical help from www.tvrepairworld.com to help figure out whats going on and they also have replacement parts available.
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