2008 Samsung HL61A750 LED DLP owners thread and FAQ - Page 529 - AVS Forum
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post #15841 of 15851 Old 11-24-2014, 11:12 PM
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2008 Samsung HL61A750 LED DLP owners thread and FAQ

half a turn counter clockwise of the horizontal adjustment knob should do it

Last edited by MagicPotatoes; 11-24-2014 at 11:15 PM.
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post #15842 of 15851 Old Yesterday, 06:45 AM
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Originally Posted by MagicPotatoes View Post
2008 Samsung HL61A750 LED DLP owners thread and FAQ

half a turn counter clockwise of the horizontal adjustment knob should do it

I found this image on the link you posted and find that it's a pretty common issue. Have you done the adjustment yourself? Is it as easy as sticking my hand back there and turning the knob? I hope to mess around with it this weekend. Thanks

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post #15843 of 15851 Old Yesterday, 08:17 AM
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Originally Posted by eddysnake View Post
I found this image on the link you posted and find that it's a pretty common issue. Have you done the adjustment yourself? Is it as easy as sticking my hand back there and turning the knob? I hope to mess around with it this weekend. Thanks
Yes, very easy. Just have someone watching the TV while you're in there turning it..they'll be able to see the shadow either getting bigger or smaller, and then can tell you when to stop.
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post #15844 of 15851 Old Yesterday, 08:24 AM
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Yes, very easy. Just have someone watching the TV while you're in there turning it..they'll be able to see the shadow either getting bigger or smaller, and then can tell you when to stop.
Thanks, is this just a temporary fix to a much bigger issue that I should prepare for down the road? Didn't really see too much on what is causing this to happen out of nowhere.

also, this is the first time I'll be in the guts of the TV, should I get dust off and give anything a good cleaning while the back is off?
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post #15845 of 15851 Old Yesterday, 09:03 AM
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Originally Posted by eddysnake View Post
Thanks, is this just a temporary fix to a much bigger issue that I should prepare for down the road? Didn't really see too much on what is causing this to happen out of nowhere.

also, this is the first time I'll be in the guts of the TV, should I get dust off and give anything a good cleaning while the back is off?
No bigger issue...the knobs tend to drift for some reason.

Yes, you should vacuum where you can. If you're a bit more ambitious, slide the "light engine" (where the LED's are mounted) out, remove the cover, and vacuum those heatsinks.

Search for replacing the LED's for instructions on how to do that part. I would highly recommend doing this, you'll be amazed at the dust on those heatsinks.
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post #15846 of 15851 Old Yesterday, 09:17 AM
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No bigger issue...the knobs tend to drift for some reason.

Yes, you should vacuum where you can. If you're a bit more ambitious, slide the "light engine" (where the LED's are mounted) out, remove the cover, and vacuum those heatsinks.

Search for replacing the LED's for instructions on how to do that part. I would highly recommend doing this, you'll be amazed at the dust on those heatsinks.
thank you, do I need anything else but power to the tv connected to fix the shadow issue?
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post #15847 of 15851 Old Yesterday, 09:20 AM
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thank you, do I need anything else but power to the tv connected to fix the shadow issue?
Power and a signal so your 'spotter' can see a picture on the screen with the shadow visible.
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post #15848 of 15851 Old Yesterday, 07:42 PM
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Well....i took apart my baby tonight. Getting more brights spots and dark spots. I heard one of the fans starting to whine so I had to do something before something burned up.

I pulled the Engine out. Something rattled. I turned it upside down and a component fell out. Turns out it was one of the inductors in the LED driver module. I could solder it back in, but why did it come off in the first place? No real signs of over heating......
Also checked out the PS....yep....leaking caps. Again....no biggie as I have a nice Pace kit that doesn't get enough use.

So....needing the following:
- replacement caps for the PS board
- replacement DMD
- 3 new fans
- LED driver module

I couldn't find the LED driver module. I'm sure I could find suitable replacements for the fans. Caps are easy. DMD is $350......
I don't want to use pulled parts since I could spend $1500 and it be dead in another month. I, like most here, love this TV, but it has me a bit ticked. I should get more than 5 years out of a TV.

So......is this even possible to repair? $3k can get me a nice 75" with a warranty.
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post #15849 of 15851 Old Yesterday, 07:46 PM
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A DMD is only $189 new at many many online places.
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post #15850 of 15851 Old Today, 12:40 PM
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I should get more than 5 years out of a TV.
i had a nice conversation with the tech who repaired mine, he does a lot of tv repairs and seemed like he really knew his stuff. I asked him about life expectancy on new tv and he said that he sees most of them getting 7 years at most. i was pretty depressed when he told me that.
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post #15851 of 15851 Old Today, 01:47 PM
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A DMD is only $189 new at many many online places.
i found it at a vendor and ordered it. Got the three fans coming too. The only thing I couldn't get was the LED Driver module. I was going to unclutter my hobby desk anyway.....I just need to get it done this weekend. Then I can set up the Pace kit and put the inductor back on.

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Originally Posted by detroit_fan View Post
i had a nice conversation with the tech who repaired mine, he does a lot of tv repairs and seemed like he really knew his stuff. I asked him about life expectancy on new tv and he said that he sees most of them getting 7 years at most. i was pretty depressed when he told me that.
thats why i couldn't see paying $3000 for something that won't last very long. the way i see it, if i can fix this and it lasts another 4 or 5 years, it'll be time to upgrade, because by then 4k TVs will be old technology.


wish me luck.
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