Official Samsung PNXXE7000 - PNXXE8000 owners thread - Page 149 - AVS Forum | Home Theater Discussions And Reviews
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post #4441 of 4454 Old 09-14-2016, 10:26 AM
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Shuts off after 5-10 minutes - power supply or main control board?

I've spent hours reading through this thread but cannot clearly discern whether I need a power supply or a main control board for my PN60E8000.

Upon good power on, unit will shut off anywhere from 5 minutes to hours later. Front lower left red led flashes in the following cycle:

short (a quick flash), medium (maybe 1 second), short, medium, short, medium, short, medium, short, long (4 seconds)
... repeat ...

I then unplug it, wait, replug and turn it back on. Works fine for 5 minutes to hours and then shuts down again.

I don't know how many are still following this thread but can anyone tell me whether I need a new power supply or main board (which is much more expensive)? I'd like to believe the LED cycle above would tell us something but I couldn't find anyone referencing the flash code it is giving.

Thanks!
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post #4442 of 4454 Old 10-01-2016, 08:27 PM
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Quote:
Originally Posted by Ranger519v View Post
I've spent hours reading through this thread but cannot clearly discern whether I need a power supply or a main control board for my PN60E8000.

Upon good power on, unit will shut off anywhere from 5 minutes to hours later. Front lower left red led flashes in the following cycle:

short (a quick flash), medium (maybe 1 second), short, medium, short, medium, short, medium, short, long (4 seconds)
... repeat ...

I then unplug it, wait, replug and turn it back on. Works fine for 5 minutes to hours and then shuts down again.

I don't know how many are still following this thread but can anyone tell me whether I need a new power supply or main board (which is much more expensive)? I'd like to believe the LED cycle above would tell us something but I couldn't find anyone referencing the flash code it is giving.

Thanks!
I have the exact same issue with my pn60e70000, i'm trying to troubleshoot it. It randomly turns off and standby starts blinking. If I unplug it for a little while, it will come back on.

I had a previous issue last year where the power supply was dead with no standby, but I got lucky by resoldering the transitors near the center of the board and it came back to life. I tried resoldering a bunch of them again this time but no luck.

At one point, it seemed that I could tap on the panasonic relay near the ac input and get things working again. I ordered a new relay from mouser thinking that was the issue. After installing it, it worked for a little while but still started cutting off again. I did notice the new relay is much quieter than the old one so maybe it helped, maybe not. I also updated to the 1060 firmware but that didn't much either.

Anyhow, I found the service manual on samsung parts dot com for $12 plus shipping so i have that on order. I borrowed a good dmm so I'll I'll start probing around for bad components. It seems capacitors and mosfets are common suspects so I'll probably order some and give it a shot. I'm not sure if I'm dealing with a power supply or main board issue so i'm hesitant to order a new board kust yet. Plus, if I can figure out which component to replace to repair it for just a few bucks, I'd much rather do that than shell out several hundred for a new board or repair service. Any advice would be helpful.
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post #4443 of 4454 Old 10-02-2016, 06:51 AM
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FWIW, I had the same problem. Replaced the power board, no change. But disabling network seemed to solve it after the fact. I also have issues with flashing, where blacks flicker to grey. Haven't pinned this down to the TV as it doesn't happen in menus.

Sent from my SAMSUNG-SM-N910A using Tapatalk
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post #4444 of 4454 Old 10-04-2016, 02:29 PM
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I've got a PN51E7000 that I purchased about 4 years ago. The display gets purple banding and splotches when the screen is bright. For example while watching Hockey or Hoth scenes from Empire Strikes Back.

Ended up buying a new Sony (this is my first and likely last Samsung) but wondering if anyone has a recommendation on what to do with this thing. New Panels are about $700. I've heard on older Samsung Plasmas the VS pots could be adjusted for voltage and may just open it up and give it a try....

I'd sell it on Craigslist but even working Plasmas aren't going for that much.

It doesn't do any of the power off stuff. It did it a couple times within the first year so I had the main board replaced as a precaution. I don't have need for it in any other rooms. It's covered up and just sitting in the garage for now.

But, it gave me an excuse to bump up to a sweet 65" 4K TV - and my wife didn't even seem to mind.

Last edited by boondongle; 10-04-2016 at 03:18 PM.
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post #4445 of 4454 Old 10-05-2016, 07:13 AM
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HDMI Cable swap seems to have fixed my flashing issue. FYI

Sent from my SAMSUNG-SM-N910A using Tapatalk
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post #4446 of 4454 Old 07-05-2017, 08:54 AM
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After a year of having the broken plasma in the garage, as I refused to throw it away even if the wife insisted its garbage. Last week I decided to open her up and do the the power supply repair as I saw the black burn mark. Sent the board to Otex Inc, as many in this thread have suggested, within the same week after shipping the old board they sent me the board all fixed up (crazy fast turnaround time). I wonder what they replaced besides just re-soldering... One would hope they may have changed the capacitors or something stronger from hopefully not reoccurring again. But long story short, TV is back to life. Thanks guys!

On another note, any of you guys using the SEK-1000 evolution kit? I'm debating if I put it back on or not. I did like having it on, just afraid that it may have caused the power supply getting fried. But I assume most people who had there power supply replaced, did not have the SEK-1000. At least hopefully...
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post #4447 of 4454 Old 07-15-2017, 09:03 AM
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Quote:
Originally Posted by Ranger519v View Post
I've spent hours reading through this thread but cannot clearly discern whether I need a power supply or a main control board for my PN60E8000.

Upon good power on, unit will shut off anywhere from 5 minutes to hours later. Front lower left red led flashes in the following cycle:

short (a quick flash), medium (maybe 1 second), short, medium, short, medium, short, medium, short, long (4 seconds)
... repeat ...

I then unplug it, wait, replug and turn it back on. Works fine for 5 minutes to hours and then shuts down again.

I don't know how many are still following this thread but can anyone tell me whether I need a new power supply or main board (which is much more expensive)? I'd like to believe the LED cycle above would tell us something but I couldn't find anyone referencing the flash code it is giving.

Thanks!
Quote:
Originally Posted by cerchiarax View Post
After a year of having the broken plasma in the garage, as I refused to throw it away even if the wife insisted its garbage. Last week I decided to open her up and do the the power supply repair as I saw the black burn mark. Sent the board to Otex Inc, as many in this thread have suggested, within the same week after shipping the old board they sent me the board all fixed up (crazy fast turnaround time). I wonder what they replaced besides just re-soldering... One would hope they may have changed the capacitors or something stronger from hopefully not reoccurring again. But long story short, TV is back to life. Thanks guys!

On another note, any of you guys using the SEK-1000 evolution kit? I'm debating if I put it back on or not. I did like having it on, just afraid that it may have caused the power supply getting fried. But I assume most people who had there power supply replaced, did not have the SEK-1000. At least hopefully...
its almost 99% the main board, even if the burnt mark indicates a bad power supply the main board almost always still is the primary culprit.

The fix, they seriously just jumper an unused circuit. I almost did mine myself but the core refund via sears enabled me to get a new mainboard for about $30 ... this plasma is still more reliable than my 78" js9500 which retailed for $10,000.00+

End of the day, samsung is not focused on making reliable TV's anymore (and judging by the recent shootout they dont even care about performance).

Video: 78JS9500(MAIN) / 60E8000 Plasma [Previously:58c8000/75hu8550/78ju7500] BD Player: Samsung K8500
Audio: Marantz 7010 / SVS PB-13 Ultra / Klipsch RF-7ii RC-64ii Polk M70's IC-5800 (5.1.4)
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post #4448 of 4454 Old 08-01-2017, 11:37 AM
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Have a 51" e8000 still works great. Was in my office but now it's in a kids room. Has 31,000 hours on it last time I checked. I got it as a replacement for a bad d8000. Actually got it a few weeks before e8000 came out.

The only issue I've ever had was it gets warm but I've attached some USB fans to the back that really help. Also the plasma has excellent picture quality just wish the blacks were better. Overall these Samsung tvs along with my f8500 are more enjoyable to watch then even my Panasonic 65" zt60. Something about the way things just look so clear with perfect color. I have a 55" gt50, 60" st60 and a 65" zt60 Panasonic. The Panasonic all have better blacks but more of a grainy picture. Also all my pannys have burn in. Neither one of my 51" e8000 or 64" f8500 have any burn in.

I have gone to oled now. I tried many 4k led tvs. None of the leds looked great to me. Seemed just equal to my plasma in contrast with bad blacks and horrible off angle viewing.

Once my plasmas start breaking I won't fix them though. Theyll be given away or thrown out. Plasmas have no real value now. I just sold a 60" vt60 with 1800 hours. Took 9 months to sell and I had to settle for $700. Won't go through that again. I honestly should of sold these plasmas a few years back when they had great value. They just keep working though
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post #4449 of 4454 Old 09-05-2017, 10:45 AM
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Well the power issue struck another one.

Our US based PN51E7000 is now in the 5 blinking red lights loop.

We were watching TV and a loud pop, flash of light in the back and smoke happened, so I unplugged the whole thing. Opened it up and there are two popped capacitors on the Y-Main board. I find the board number but where do you guys find the part number?

Board model 50 ds ym
PCB number LJ41-09427A
PBA NR LJ92-01766A
REV CA2

In a basic lookup I can find a used Y-Main for about 30 bucks on gopartserv.com, but I want to make sure it's the right thing. If the cost gets near 100, I'd rather just get a new TV for 300-400, as this is a bedroom TV anyway. Othwerwise, scrap it for parts? Take it to a recycling place?

Thanks for any advice.

Edit: went for the partserv order. Delivered next day, well packed and there's the y-main and y-daughter board too. Install was a snap, TV works wonders and less capacitor whine than before. Highly recommend trying a fix before dumping the TV. Now what to do with the "bad" board and the smaller daughter board. Anyone want them?

Last edited by andydumi; 09-14-2017 at 06:33 AM.
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post #4450 of 4454 Old 09-19-2017, 05:52 AM
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Well add me to the list. I got the TV in 2012 and its been great ever since with no major issue until about 2 months ago when my wife mentioned it was acting "weird".

It would power off and reboot but I never saw it happen. Then it started happening more frequently and just last night it powered off and wouldn't come back on and gave me the 5 flashing red lights. I unplugged it and it would come back on for about 10mins and do it again. I asked my wife if it made any funny noises or pops or sparks and she said no so I guess that's a good sign.

I've read through the thread and it appears its likely the power supply or main board. I'll try to lay it down and open it up later. Is there any pages with pictures of this opened up so I know what i'm looking for? Is there any options for replacement parts still available as i've seen people complain there isn't any available if you have to replace them.
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post #4451 of 4454 Old 09-20-2017, 04:29 AM
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Quote:
Originally Posted by dmercer3 View Post
its almost 99% the main board, even if the burnt mark indicates a bad power supply the main board almost always still is the primary culprit.

The fix, they seriously just jumper an unused circuit. I almost did mine myself but the core refund via sears enabled me to get a new mainboard for about $30 ... this plasma is still more reliable than my 78" js9500 which retailed for $10,000.00+

End of the day, samsung is not focused on making reliable TV's anymore (and judging by the recent shootout they dont even care about performance).
So do you have a link to how you did the sears main board switch out because that sounds like the best deal over anything else I found online so far. I'm having the reboot issues along with it not wanting to turn on now so i'm pretty positive its the main board over the power supply. I pulled the power board off and looked it over and didn't find any external defects (bulging capacitors or black scorch marks).

From what I read it looked like sears wouldn't sell you anything unless you are a tech otherwise they make it impossible to buy anything unless you schedule one of their techs to come out and look it over.

Last edited by Jruc03; 09-20-2017 at 05:20 AM.
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post #4452 of 4454 Old 09-21-2017, 02:41 PM
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So do you have a link to how you did the sears main board switch out because that sounds like the best deal over anything else I found online so far. I'm having the reboot issues along with it not wanting to turn on now so i'm pretty positive its the main board over the power supply. I pulled the power board off and looked it over and didn't find any external defects (bulging capacitors or black scorch marks).

From what I read it looked like sears wouldn't sell you anything unless you are a tech otherwise they make it impossible to buy anything unless you schedule one of their techs to come out and look it over.
sears will sell it to you, if i remember correctly i actually called them and placed the order for this reason. if they ask if you are a technician.... you answer that question however truthfully you want.

Video: 78JS9500(MAIN) / 60E8000 Plasma [Previously:58c8000/75hu8550/78ju7500] BD Player: Samsung K8500
Audio: Marantz 7010 / SVS PB-13 Ultra / Klipsch RF-7ii RC-64ii Polk M70's IC-5800 (5.1.4)
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post #4453 of 4454 Old 09-22-2017, 08:52 AM
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sears will sell it to you, if i remember correctly i actually called them and placed the order for this reason. if they ask if you are a technician.... you answer that question however truthfully you want.
Thanks. I decided to start with repairing the power board first after reading more of the comments in the thread of people describing the same exact issues as me. If that doesn't fix it i'll move onto the main board and try my luck.
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post #4454 of 4454 Old 09-28-2017, 06:37 AM
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My fixed power board should be coming in today so i'm crossing my fingers that it's the fix (wife and kid are getting impatient and want their TV back).

EDIT: I put it in last night and she lives.... Not bad I guess for only having to pay $68 to get it fixed (sent it to a company named PTS Electronics in Indiana, quick turnaround time). Now hopefully it lasts for another 5 years or longer without any issues.

Last edited by Jruc03; 09-29-2017 at 05:42 AM.
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