Originally Posted by Miclot5
Hi All, I bought the HL67A750 in Jan 09. It has been a pleasure. Not a ton
of use but consistant. I turn the set off and you hear a whine humming sound. This continues constantly. Turn it on, turn the sound off. and you will still hear the whine? Any thoughts or how to look up such a thing would help enormosly.
If the whine eventually quits while the TV is off, then it's the intenal cooling fan. On this model tv the fan(s), I believe there are 2, are the only moving parts. The fan(s), I don't know if it's only one or both, will continue to run for a while to cool the TV down when the TV is switched off. Eventually, the fan(s) will shut themselves off.
I'd say you have a fan bearing going bad. I don't believe you need genuine Samsung replacement parts for a bad fan. Just lookup a good computer cooling fan and use it. You'll need the old fan to matchup size, voltage and current (should be on a label on the fan). As long as you don't cheap out on the fan, you could easily get a fan with much higher performance and lower noise than the original fan at about the same price. You may have to solder (or crimp) the old connector to the new fan. I'd think it would be well worth your effort to investigate. Especially, since some folks seem to be adding external USB fans to cool the TV even more.