Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2
Glad you asked. As a matter of fact, the Vizio had trouble free operation for only about 5 hours total over a couple of days. Then it started having "glitches". First the picture went out, with sound still, but this time is was not totally black, but the whole screen looked like "blooming" if you know what blooming is on a uhdtv. Well, I thought it was hopefully just a one time hiccup, but not to be. Then the next day the screen froze. The image froze on the screen, and the tv...
Toddo
Member
Last Activity: 03-31-2024, 09:41 PM
Joined: 02-20-2017
Location: Richmond, VA
-
Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2
I have a Vizio 50" P502ui-B1E with the same symptoms as the OP. I bought this TV brand new in 6/2015 for $750 (HD TV's were just coming out at that time and were kind of expensive). So almost exactly 5 years went by before it crapped out. I was on my PC a couple days ago and the screen went flakey with nothing but multicolored very thin vertical lines all the way across the screen and then about a minute later the screen just went black. I watched a ShopJimmy Youtube video on how to check the power supply...Leave a comment:
-
Polarity on tiny capcitor
So I ordered the whole mainboard from ShopJimmy because they were out of stock on the main board repair kits and I installed it in the Emerson and the PSU is still squealing. So what I then did, which I should have thought of before I tried a known good main board, I unplugged all connections to the PSU except the power cord and I still get the sound. Which means the fault is on the PSU.
When the set is plugged in but on standby the transformer makes a light whine sound, then when you turn it on and the PSU powers up the mainboard and backlight...Leave a comment:
-
Re: Emerson LF401EM5 LED TV no power won't turn on
Well I finally recieved and installed the Schottky SB3100 diode in place of that general purpose rectifier and still have the screeching sound coming from the yellow transformer. The good news is, this is a common problem, the PSU it appears is actually working fine now after the ShopJimmy repair kit job + Schottky diode at D653, and the whole buzzing sound issue has already been discussed in depth on BadCaps here:
[url]https://www.badcaps.net/forum/showthread.php?t=54169&highlight=Emerson+LF401EM5&page=2[/url]...Leave a comment:
-
Re: Emerson LF401EM5 LED TV no power won't turn on
Thanks for the info. That component on my board didn't have any insulating material between it and the heat sink. Just a whiteish looking paste which I assume is thermal paste.
Question: Do SMD's have polarity? This is one of the ShopJimmy SMD's I soldered on. (Please ignore the atrocious soldering beads. The one on the left looks like a dog pile).
If you see the lines on that SMD, I wasn't sure if that indicated polarity so any SMD's with lines on one end I just took a guess and turned...Leave a comment:
-
Schottky SB3A0 Equivalent is SB3100
Looking at the datasheet for the SB3100 here - [url]http://www.futurlec.com/Diodes/SB360.shtml[/url]
..it looks like the equivalent of the SB3A0 here - [url]https://store.comet.bg/download-file.php?id=1701[/url]
I found the SB3100 on Ebay here shipping from China - [url]http://www.ebay.com/itm/20pcs-SB3100-DIODE-SCHOTTKY-3A-100V-NEW-VISHAY-/322051705265?hash=item4afbc709b1:g:b18AAOSwT5tWL0U8[/url]
Now all I gotta do is wait a month and a half for it to ship from China
Schottky SB3A0 Equivalent is...
Leave a comment:
-
Re: Emerson LF401EM5 LED TV no power won't turn on
Yikes OK. I don't know where I'm gonna find the SB3A0. Couldn't find it anywhere. Anyone got any info where to find that diode?
Edit: I just wanted to ask one other thing. The three lead component from ShopJimmy (is that a cathode diode or a FET?) is screwed to what looks like a heat sink. That should have some thermal paste between that and the heat sink I'm guessing. It had some white paste behind it on the old one. I figured it was thermal paste. I put a little bit of Arctic Silver...Last edited by Toddo; 03-13-2017, 06:02 AM.Leave a comment:
-
Can you indentify this noise the PSU is making after repair
So I got all the ShopJimmy parts on the PSU and an additional bad diode that didn't come with the ShopJimmy kit and miraculously the TV powered right up. Got a minor hitch though. The PSU is making this crazy sound haha. It sounds like it's coming from the yellow transformer on the pics above. Can anyone make out what could be causing this. The TV is powering up fine and the fuse isn't blowing. I know some of my soldering was rough but all the connections must be fine cause it's powering up.
There is one diode...Last edited by Toddo; 03-12-2017, 09:59 PM.Leave a comment:
-
Re: Emerson LF401EM5 LED TV no power won't turn on
Thanks...Leave a comment:
-
Re: Emerson LF401EM5 LED TV no power won't turn on
Can someone help my identify this diode:
It's got SB3A0 printed on one side which I found is a SCHOTTKY BARRIER RECTIFIER diode and then it's got the value of 65 printed on the other side. Does "65" mean 65 volts? I'm gonna replace both of these diodes since the ShopJimmy repair kit did not include them and the one still has continuity with a leg lifted and the other one is still suspect. I'm gonna have to order them from ebay and I wanna make sure I get the right one.
Edit: Looking...Last edited by Toddo; 03-06-2017, 02:10 PM.Leave a comment:
-
Re: Emerson LF401EM5 LED TV no power won't turn on
I'm gonna go ahead and do that. Get a cheap board then get the repair kit from shopjimmy and try to repair the old board too just for the heck of it.
I appreciate everybody's advise. I feel pretty confident this TV will be back in operation with a replacement PSU and without buying a whole new TV.
Thanks Yall!!...Leave a comment:
-
Re: Emerson LF401EM5 LED TV no power won't turn on
I will probably give the shopjimmy kit a try first before I buy the whole PSU. I can see plainly where that big 3 lead transistor goes, the brown component which is probably the fuse and that one resistor with the 2 red stripes 1 silver stripe & 1 gold stripe goes. I hope shopjimmy gives me the location of the other 5 components. I want to see what VinceRoger69 has to say first before I order the shopjimmy kit.
With that fuse being blown it should have protected the main board and the rest of the TV...Last edited by Toddo; 02-21-2017, 09:09 PM.Leave a comment:
-
Re: Emerson LF401EM5 LED TV no power won't turn on
Black Retangle: This part has no continuity. If it's a fuse it's blown.
All 3 legs of this transistor still has continuity:
The 1 diode in this pic looses continuity with leg lifted. The other still has continuity:
And this diode still has continuity with a leg lifted:
Some diodes I test for continuity ring out for a brief second then loose it. Don't know what that's about. But the three I have pointed...Leave a comment:
-
Re: Emerson LF401EM5 LED TV no power won't turn on
I have actually fixed a previous TV I owned about 3 or 4 years ago. It was an Akai 32" LCD TV that had the red standby light on but no power (first HD TV I ever owned). I got on the internet and found that these sets usually have some specific bad electrolytic caps so I took it apart and it did indeed have some badly bulging caps. Went down to the electronics store got the replacement caps (with higher rated voltage), desoldered the bad ones and soldered in the new one's and the TV powered right up. It's the "blue...Leave a comment:
-
Emerson LF401EM5 LED TV no power won't turn on
My son was watching his TV when it just went blank. The TV is only 2 years old. I know almost absolutely nothing about TV repair/troubleshooting. I can't see throwing away this TV and buying a new one when it probably only has about $4.00 worth of bad components that need to be replaced.
Since I'm getting nothing at all I "assume" there's something bad on the power supply. I went ahead and removed the PS and checked out the tops of all the electrolytic capacitors on the board and they're all good and flat. No bulging at all on any of them. I found a YouTube video and learned... -
Re: New Members - please post your introductions here
Hello my name is Todd!Leave a comment:
-
Re: New Members - please post your introductions here
My name is Todd and I have no experience in TV Repair/electronic repair except one time a few years ago when the Akai 32" LCD TV wouldn't turn on so I found on the internet how to scope out the power supply and locate bad electrolytic caps and replace them. Which I did for about $3.50. I was so proud to fix my own TV!Leave a comment:
No activity results to display
Leave a comment: