Samsung LN46A650 Issues

mrbiron

Good afternoon all,

I just recently went to turn on my beloved TV when the oddest quirk started happening.
The TV plays it's initial melody, clicks, and then turns off all in a matter of 5 seconds. The screen does not even turn on and this continues endlessly. The little lady had told me after a while, it did finally turn on but we are talking 10-15 minutes of looping. She's far more persistent than i am.

A couple nights ago, i was using my computer to send signal to the TV via HDMI and thought that the TV might still be searching for that signal but it should still turn on. Stumped.

What is going on here? I have eliminated everything from the equation by unplugging all components from the TV and still to no avail, she's hurtin!

Have any of you had luck with Geek Squad coming out and checking your TV?
Have any of you experienced this with your TV's and if so, how did you rectify it? I've been reading about possible bad caps on the power board??

Thanks!

AsSiMiLaTeD

I've read about several Samsung models with bad caps, but don't recall the specific model numbers.

thsmith

http://www.polkaudio.com/forums/showthread.php?125488-Will-Never-Buy-Another-Samsung-Product

mrbiron

Thanks THSmith. I remembered briefly reading your thread when you first started it and thought to myself, I have no problem with Samsung, my TV still looks great! I want to say flat out that i am Sorry! i labeled you in my head but now can sympathize with your pain. I hope this doesn't offend you :redface:

I just looked up when i purchased this thing on Amazon. May 15th 2008...3-1/2 years old!! It's just a baby!
1year on parts and labor...YACK!

First i am going to pop the back off and see if the caps are shot. I have never soldered in my life but am willing to give it a whirl if the process is easy. I didn't notice but did your repair fix the problem and is your TV running again?

Also, am still looking for thoughts on the geeks over at best buy. Good, Bad??

thsmith

DO it yourself, look at youtube search for Samsung LCD repair. Yes it did fix my problem.


Not offended at all, there will be others here that have LCD Samsungs that will experience the problem unfortnately.

The repair if paying someone will be $300 which is nothing more than swapping the power supply board. The caps cost about $4.

mrbiron

These appear to look just like the ones you had in your TV.
Where did you order the parts from?

mrbiron

i see the two 10V 1000uf caps. You say to get 12V 1000uf caps

Also, the two that are blown are 25V 1000uf caps. Do these need to be upgraded as well?

CoolJazz

Those caps are certainly bulged at the top and are bad. No big surprise is that they are right next to a heat sink.

That's the cause of the problem. Electrolytic caps and high heat sources don't make good neighbors. The end one in the one pic looks like it says 105 degree C so they did use more heat tolerant caps already.

Any additional ventilation that you can encourage across that area would help the future life!

Good luck with the repairs!

CJ

Phasewolf

I would order from digital key myself. Personalty I would order Nichicon HE capacitors. They are made for switching power type of work and do a good job at it.

thsmith

mrbiron wrote: »

i see the two 10V 1000uf caps. You say to get 12V 1000uf caps

Also, the two that are blown are 25V 1000uf caps. Do these need to be upgraded as well?

The ones I used were from Frys and as long as you use a voltage 12v or higher you are fine, I think mine were 25v.

mrbiron

So i've just spent that last hour on digikey.com and haven't the faintest clue at what i am looking at.
Can any of you completely dumb this down for me?! i Don't know tolerances, ripple current, etc...

thsmith

http://www.amazon.com/1000uf-Capacitor-High-Radial-Leads/dp/B004O21PPE/ref=pd_cp_e_1

Toolfan66

Thanks for the pics and info as I own three Sam LCD's sorry to hear about the problem but I'm guessing this will happen sometime down the road.

mrbiron

Thanks THSmith......ordered. Shipping is a b*tch!...$4 in parts and $11 in shipping.....:eek:
I bought 2 of the 16V and 2 of the 25V.

After further investigation, the little lady tells me that this has been happening the whole week that she was off. Women!...Can't live with'em, can't kill'em. :evil:

Toolfan...I did a lot of search last night and 75% of the stories i was reading were about 2006-2008 LCD's with the wrong parts installed. If yours are older or newer, i think you're in the clear for the time being.

mrbiron

Soldering Iron and all the accessories have been purchased for this job. Now we are just waiting on the caps.
I also bought a little kit from Radio Shack that have about 20 parts to solder onto a small pcb for an introductory course into soldering.
Shipping better be on time. This 32" isn't cutting the bread from 12 feet away.

thsmith

THe hardest part is removing the old cap and clearing the PCB hole of the old solder. I use a braided copper approach but others like solder suckers.

Good luck and you will soon be back in business.

Serendipity

I would suggest using a quality desoldering tool to help with removing the old solder. Sometimes, if the old solder doesn't come off easily, a light "tap" of the board against a table while heating the connection will get the solder to come off without damaging the board.

You really don't want to overheat the solder pads, so this is one of those situations where the right tool comes in handy.

mrbiron

I picked up the copper braid for desoldering. The suckers looked cheap but i may be so far off the ranch with this one, i just don't know any better. Caps are supposed to be in on Wednesday...HURRY UP!

michael1947

I think it's amazing that you guys can fix this stuff. I think I may give something a try sometime...got lots of broken stuffff.

miner

My 2008 model 32" 330 Series LCD developed the problem on Sunday. Called Samsung and they gave me the info to get it repaired under warranty - 1 time. Took it by the repair shop on Monday, waited while they repaired it. Took them 2 minutes. Replaved two bad caps. Bill to Samsung was going to be $76. This TV was in a workout room and was used maybe 5 hrs./week. I have the same TV in our BR.