SOURCE: Samsung HL-S5679W - Power-up issue
There can be a few causes. One of the LED Modules has gone bad, The LED Driver board has gone bad and or the Power Supply has gone bad. You will need to have a good tech look into it.
SOURCE: Why won't my Samsung HL-R4667W DLP tv turn on?
Theres a cover on the back that is vented w/4 screws on like the corners,also theres a symbol that looks like a "T" on it,take that cover off and right behind the symbol "T" an arm like plastic piece is what hits a lever inside when then cover is installed ,flip that little blue lever up and down a couple of times with the set unplugged reinstall cover making sure the "T" is in the position to hit the lever and tighten not too tight.
if this don't work it may be your colorwheel.Good Luck!
The part replaced is the blue convergence IC, part number usually
STK392-040 .A generic IC will last 10-12 months.You must have
OEM or better quality for durable repair. I use Panasonic brand.
Change both IC's for long repair duration.
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