Have a Samsung HLS6187W with intermittent 3 flashing lights issue.
Replaced the lamp with OEM phillips lamp twice (to ensure I didn't get a bad lamp)
Replaced Color wheel just to be thorough.
Noticed when the TV shuts itself down, or sometimes when powering on , I could hear a buzzing sound in the back.
Pulled rear panel off and shorted the Lamp door switch with a paperclip, found the buzzing noise was the lamp arcing but not lighting, then it may light or it might not.
At this point I'm convinced it's the ballast, so ordered a brand new one from Discount Merchant.
Unbelievably, the issue continued after replacing the ballast.
The tv usually shuts down after about 5 seconds of being turned on, and power cycling it a few times seems to warm it up enough that the issue goes away.
After it settles down it will stay on for hours, or all day without any issues. occasionally it will shut itself down later, but not very often.
The only thing left to replace I can think of is the DMD board or the Power board.
I'm leaning toward the power board, as I cant see how the DMD would cause the ballast to arc the lamp, but not provide enough power to light it.
I also have a symptom that has happened a few times, where while it is cycling on and off trying to light the lamp, the lamp will light but there will be no picture (or menu) until I turn the tv off and back on again. This was leading me to believe it could be the DMD, but that could be also caused by the DMD not getting enough power?
Does anyone know what voltage should be present at the power connector to the ballast?
Thanks for any help.