2008 Samsung HL61A750 LED DLP owners thread and FAQ - Page 540 - AVS Forum | Home Theater Discussions And Reviews
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post #16171 of 16183 Old 01-10-2016, 12:47 AM
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Originally Posted by hpman247 View Post
Well, It's happened again. I had to come back here and search the posts to see what exactly my proble, was the last time, and it appears to be the same again. The TV makes the ususal sound when it's booting up, the LED light blinks about 20 times, then it cycles again, 20 blinks, cycles one more time, and then I get the 3 blinking lights.

It was the LED Board last time, so I'm assuming it's the same again.

I replaced the DMD chip a few months ago to fix the white specks, and it was pretty easy. I found a service manual online, and a few videos on YT, so tonight I took out the whole assembly and looked at the LED Driver Board. It looked ok, smelled ok, but I'm guessing it's fried. It has no heat sinks on it, and it's been in use for the past 5 years. Seems plausible.

Anyways I went ahead and bought a VIZIO E70-C3, but I'm still planning to repair this one over time. If it's not the Driver board, I guess it's the SMPS or the DMD board.

One thing that I can tell is similar to last time is that the TV at boot always goes from a pitch black, to a brightened black when you turn it on. It lasts only for a second before the picture pops up. This does not happen now. The screen just stays pitch black, as it did when the LED Board failed in 2010.

I'll test all the LEDs with a 9v battery tomorrow, and try to figure out exactly how to use the multimeter to test the SMPS for the 16v pins. I don't know if I'll do it right, but I'll give it a shot.
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Originally Posted by hpman247 View Post
I just took a closer look at the subSMPS board.. It appears that the capicitors are bulging. The 4 on the left side pf it are bulding badly. The lone capicitor on the right isn't bulging.

One the Main Power board, none of the caps are bulging.

Should I replace the sub9SMPS board, you think?
Just to update for anyone else who has this issue.

I replaces the sub smps board with one I purchased on eBay, and it took care of the problem. The TV booted up, but only the red LED was working. I'd literally taken the whole LED assemble apart anyway, so i just remved the heatsinks again, popped off the LEDs, made sure the connections were ok, then left them out, plugged the TV back in and saw that all 3 lit up. <<<That may not be safe or advisable, but I turned off the set immediately after I saw all three color illuminate.

So, I cleaned off all the thermal paste, reapplied some arctic silver, and put it all back together. At this point the tv booted up, all LEDs were working and all was well. I'll probably just put the TV in storage right now since I bought the 70" Vizio. I'll keep it around for when I move in a few years and have an extra room or two that could use a TV.

This TV is really easy to take apart and you can find the service manual for free just by googling it. Good luck on any future repairs all.

I checked the service menu MUTE - 1 - 8 - 2- POWER, and saw my LED life is at 32,000 hours. Looks like it's about reached middle age

"Knowledge is Power... But...Wisdom is the effective application of knowledge."

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post #16172 of 16183 Old 01-11-2016, 01:59 PM
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Originally Posted by LordRasta View Post
My new toy...<br><br><img alt="" src="http://i232.photobucket.com/albums/ee176/kingrasta/photo3.jpg" style="border:0px solid;"><br><br><img alt="" src="http://i232.photobucket.com/albums/ee176/kingrasta/photo4.jpg" style="border:0px solid;"><br><br><br>
Samsung HL-67A750<br>
Bush VS74962 Stand<br>
Denon AVR-1082<br>
Denon POA-8300<br>
Denon POA-8200<br>
Denon POA-5200 (future expansion if we ever move and I go to 7.1)<br>
Denon 1800BD Blu-Ray Player<br>
Denon CDR-W1500 CD Recorder<br>
Monster HTS 1800 Stage 2 Power<br>
Monster HTS 1000 MKII Power<br>
Comcast DCT3416<br>
Klipsch SUB-12<br>
Klipsch VC-25 Center Channel<br>
Bose Acoustimass 5 - Fronts<br>
Bose Acoustimass 5 - Rears<br>
Bose 301 Series IV - Music listening only<br>
Xbox 360 Elite<br>
Logitech Harmony One<br><br>
Took lots of years and lots of saving. Dad always comes last.
Almost 7 years later and still no heat or weight issues. :-) The Samsung however was good to me but she went onto another home and replaced with a Samsung 75" 4K model. All my audio components are the same and still impress people when they come over.
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post #16173 of 16183 Old 01-21-2016, 11:19 AM
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I found a couple answers in this thread, and now can't find them again (my search capabilities seem to have crashed ...)

I got a Check Fan 3 message, and don't feel equipped to open up the TV and replace the fan, or even to blow dust around. So, am considering having the $$amsung Authorized Repair outfit come by to give me an estimate - or to have someone else open up the TV if it's easy enough.

I did read when one fan goes the other two are likely not far behind, and am wondering if/where the parts are available for the 3 fans, or at least for Fan #3 . I thought it's probably time to buck up and get another TV, but I honestly hate glossy screens, don't care about 4K or Smart - and if it's not too involved would prefer to just hang onto this set.

Thanks.
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post #16174 of 16183 Old 01-21-2016, 11:19 AM
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I found a couple answers in this thread, and now can't find them again (my search capabilities seem to have crashed ...)

I got a Check Fan 3 message, and don't feel equipped to open up the TV and replace the fan, or even to blow dust around. So, am considering having the $$amsung Authorized Repair outfit come by to give me an estimate - or to have someone else open up the TV if it's easy enough.

I did read when one fan goes the other two are likely not far behind, and am wondering if/where the parts are available for the 3 fans, or at least for Fan #3 . I thought it's probably time to buck up and get another TV, but I honestly hate glossy screens, don't care about 4K or Smart - and if it's not too involved would prefer to just hang onto this set.

Can someone point me to the part numbers and where to get them?

Thanks.

Addendum: found the part number, ordered two of them, and will have someone install. I know most of you guys would do it yourself cheaper, but for $200 now I won't have to go through the trauma of giving up my beloved set! The service guy said the big fan doesn't usually go out, and so I'm only replacing the two small ones.

Should I replace the big one also? (don't know part number for that one)

Last edited by moonscape; 01-21-2016 at 02:32 PM. Reason: Addendum
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post #16175 of 16183 Old 01-21-2016, 11:32 PM
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Quote:
Originally Posted by moonscape View Post
I found a couple answers in this thread, and now can't find them again (my search capabilities seem to have crashed ...)

I got a Check Fan 3 message, and don't feel equipped to open up the TV and replace the fan, or even to blow dust around. So, am considering having the $$amsung Authorized Repair outfit come by to give me an estimate - or to have someone else open up the TV if it's easy enough.

I did read when one fan goes the other two are likely not far behind, and am wondering if/where the parts are available for the 3 fans, or at least for Fan #3 . I thought it's probably time to buck up and get another TV, but I honestly hate glossy screens, don't care about 4K or Smart - and if it's not too involved would prefer to just hang onto this set.

Can someone point me to the part numbers and where to get them?

Thanks.

Addendum: found the part number, ordered two of them, and will have someone install. I know most of you guys would do it yourself cheaper, but for $200 now I won't have to go through the trauma of giving up my beloved set! The service guy said the big fan doesn't usually go out, and so I'm only replacing the two small ones.

Should I replace the big one also? (don't know part number for that one)
Oh no, don't pay to have them put in, It will only take you about ten minutes to put them in.
If you need the page out of the service manual that shows the fans I will send it to you if you PM me.
I am not sure which one they call #3 but if it is the one on the DMD chip you do not have to do anything but take the back off and it is right there.
If it is that fan and you are not real crazy about taking it apart I would just replace it and not bother with the other one till you need to.
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post #16176 of 16183 Old 01-22-2016, 01:43 PM
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hi, what is the last firmware for samsung 61a750 ....i see firmware 1007.4
where i can download firmware 1007.4
thx
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post #16177 of 16183 Old 01-22-2016, 02:20 PM
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Originally Posted by Roger Clark View Post
After 7 years of flawless operation, my DLP chip started to display the white dots, 1 at first, then 2 after about a week, then 3 two days later. I ordered the replacement chip and did the install which was pretty straight forward. Cleaned everything while I was in there and I still love this set!
I have the white dot problem with two of them. Is there a post that details how to replace the DLP chip? Also it would be nice if the fan(s) on the set could be made quieter. Thanks.
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post #16178 of 16183 Old 01-23-2016, 01:19 AM
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Originally Posted by Benoit Alarie View Post
hi, what is the last firmware for samsung 61a750 ....i see firmware 1007.4
where i can download firmware 1007.4
thx
The only version available from Samsung is 1005.3, available thru this link
http://www.samsung.com/us/support/ow...ct/HL61A750A1F
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post #16179 of 16183 Old 01-23-2016, 02:03 AM
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Originally Posted by StillwaterTownie View Post
I have the white dot problem with two of them. Is there a post that details how to replace the DLP chip? Also it would be nice if the fan(s) on the set could be made quieter. Thanks.
Never mind. I found a youtube video on how to replace the chip.
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post #16180 of 16183 Old 01-23-2016, 06:28 PM
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Big thanks to the board! I bit the bullet and replaced the DMD chip, $185 Amazon via shopjimmy.com. No more white dots. The picture is actually better than new now. It took me about 2.5 hours total. I could do the whole thing over easily in under 30 minutes. It's one of those things that is really simple, except the first time you do it.

I found 2 sets of instructions. The YouTube one is a bit generic and things look slightly different than our TV. I found another one specific to our TV. It had you remove the 3 screws the YouTube Video says not to remove. I recommend not moving the screws and the board will come apart like the YouTube video with the bracket still connected to the back. So I had to jack around with it an extra half hour to get the geometry right. It is pretty simple, loosen those three screws move the card around until Geometry is really close, then you can finish up with the final adjustment with the remove.

After I had the TV all back together, I noticed some of the text on the screen was slightly blurry. The YouTube instructions mention adjusting the focus, but I could not find the focus. So I went after it again, the little adjustment wheel is about 4 inches to the left and behind that dmd chip, you can find it with your fingers 90 degrees from where your fingers fit between board and power supply.. I wish I had a diagram. After a little trial and error I got it pretty good.

The one thing to mention for those who have not replaced their chip. My new chip makes the brightness, way brighter. I guess the old chip was wearing out a little bit. I have to move the contract and brightness down a bit if I don't want to be blind.

In the end, this board is excellent. I love this TV and so glad I went for it. However, I'm still a bit mad at Samsung. I still think this is a defect that they should fix and stand by their product. Not sure how I feel about buying anymore of their products.
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post #16181 of 16183 Old 01-24-2016, 01:10 PM
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I love this TV and so glad I went for it. However, I'm still a bit mad at Samsung. I still think this is a defect that they should fix and stand by their product. Not sure how I feel about buying anymore of their products.
Mitsubishi, Toshiba, and several others used the same chip and it was not actually manufactured by Samsung so by getting a different brand because you feel Samsung did something wrong you would be hurting yourself if you really preferred the Samsung brand.

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post #16182 of 16183 Old 01-24-2016, 07:34 PM
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Mitsubishi, Toshiba, and several others used the same chip and it was not actually manufactured by Samsung so by getting a different brand because you feel Samsung did something wrong you would be hurting yourself if you really preferred the Samsung brand.
...except that Mitsubishi has been replacing the chip free out of warranty for the last few years.

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post #16183 of 16183 Old Today, 01:49 PM
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Successfully replaced the DLP chip today. The mirrors just started to go at seven years and 15,000 hours. I used thermal paste in place of the stock pad so time will tell there. I needed to adjust the horizontal illumination after the job but I honestly don't know if that was out of whack already.
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