Badcaps.net Forum
Go Back   Badcaps Forums > Troubleshooting Hardware & Devices and Electronics Theory > Troubleshooting TVs and Video Sources
Register FAQ Calendar Search Today's Posts Mark Forums Read

 
Thread Tools Display Modes
Old 11-19-2019, 01:57 PM   #1
Bloopeta
Badcaps Veteran
 
Join Date: Jun 2018
City & State: Hartlepool
My Country: United Kingdom
I'm a: Knowledge Seeker
Posts: 213
Default LOGIK L32HED13 LED TV Intermittent wont turn on

LOGIK L32HED13, turns on and works fine most of the time, but im told every now and then, it wont switch on.

Is C25 on the PCB meant to look like that? Or could that perhaps be the problem?
Attached Images
File Type: jpg 20191119_194939.jpg (717.5 KB, 10 views)
File Type: jpg 20191119_195018.jpg (862.2 KB, 5 views)
File Type: jpg 20191119_195029.jpg (626.7 KB, 10 views)
File Type: jpg 20191119_195057.jpg (373.9 KB, 12 views)
Bloopeta is offline   Reply With Quote
Old 11-19-2019, 02:06 PM   #2
nomoresonys
Badcaps Veteran
 
Join Date: Jan 2013
City & State: midwest
My Country: U.S.
I'm a: Knowledge Seeker
Posts: 4,423
Default Re: LOGIK L32HED13 LED TV Intermittent wont turn on

Yes, that seems like the symptom of a marginal/bad/weak capacitor, that cap does look unusual, I haven't seen any that were not flat on top, that were good that is.
nomoresonys is offline   Reply With Quote
Old 11-19-2019, 02:23 PM   #3
Bloopeta
Badcaps Veteran
 
Join Date: Jun 2018
City & State: Hartlepool
My Country: United Kingdom
I'm a: Knowledge Seeker
Posts: 213
Default Re: LOGIK L32HED13 LED TV Intermittent wont turn on

C12 looks a bit strange too, but as in the top os indented, is this normal??
Attached Images
File Type: jpg 20191119_201542.jpg (429.0 KB, 6 views)
File Type: jpg 20191119_201641.jpg (482.5 KB, 6 views)
File Type: jpg 20191119_201732.jpg (530.6 KB, 6 views)
File Type: jpg 20191119_202050.jpg (584.5 KB, 5 views)
Bloopeta is offline   Reply With Quote
Old 11-19-2019, 02:30 PM   #4
nomoresonys
Badcaps Veteran
 
Join Date: Jan 2013
City & State: midwest
My Country: U.S.
I'm a: Knowledge Seeker
Posts: 4,423
Default Re: LOGIK L32HED13 LED TV Intermittent wont turn on

That one looks pretty strange to me for sure.
nomoresonys is offline   Reply With Quote
Old 11-19-2019, 02:37 PM   #5
nomoresonys
Badcaps Veteran
 
Join Date: Jan 2013
City & State: midwest
My Country: U.S.
I'm a: Knowledge Seeker
Posts: 4,423
Default Re: LOGIK L32HED13 LED TV Intermittent wont turn on

Wonder if those cheap esr meters are any good on ebay.
nomoresonys is offline   Reply With Quote
Old 11-19-2019, 04:50 PM   #6
diif
Badcaps Veteran
 
Join Date: Feb 2014
City & State: Midlands
My Country: England
I'm a: Professional Tech
Posts: 4,367
Default Re: LOGIK L32HED13 LED TV Intermittent wont turn on

Quote:
Originally Posted by Bloopeta View Post
LOGIK L32HED13, turns on and works fine most of the time, but im told every now and then, it wont switch on.

Is C25 on the PCB meant to look like that? Or could that perhaps be the problem?
C25 is for the missing capacitor above, that's D9 and a diode. What is the value of the small green capacitor in photo 3 at the bottom of the PCB under the word HOT. ?

Quote:
Originally Posted by Bloopeta View Post
C12 looks a bit strange too, but as in the top os indented, is this normal??
It does look a little funky on the top.

Quote:
Originally Posted by nomoresonys View Post
Wonder if those cheap esr meters are any good on ebay.
Having compared the readings to my Peak ESR70, yes they are. They also have the added bonus of measuring mosfets and resistors and are significantly cheaper.
diif is offline   Reply With Quote
Old 11-19-2019, 07:29 PM   #7
nomoresonys
Badcaps Veteran
 
Join Date: Jan 2013
City & State: midwest
My Country: U.S.
I'm a: Knowledge Seeker
Posts: 4,423
Default Re: LOGIK L32HED13 LED TV Intermittent wont turn on

Lots to choose from: https://www.ebay.co.uk/sch/i.html?_f...sacat=0&_sop=2
nomoresonys is offline   Reply With Quote
Old 11-19-2019, 07:45 PM   #8
R_J
Badcaps Veteran
 
Join Date: Jun 2012
City & State: ☻
My Country: Canada
I'm a: Professional Tech
Posts: 5,106
Default Re: LOGIK L32HED13 LED TV Intermittent wont turn on

I would remove the power supply board and inspect the solder connections espectially on the transformer pins etc.
R_J is offline   Reply With Quote
Old 11-19-2019, 10:41 PM   #9
Bloopeta
Badcaps Veteran
 
Join Date: Jun 2018
City & State: Hartlepool
My Country: United Kingdom
I'm a: Knowledge Seeker
Posts: 213
Default Re: LOGIK L32HED13 LED TV Intermittent wont turn on

Quote:
Originally Posted by diif View Post
C25 is for the missing capacitor above, that's D9 and a diode. What is the value of the small green capacitor in photo 3 at the bottom of the PCB under the word HOT. ?



It does look a little funky on the top.



Having compared the readings to my Peak ESR70, yes they are. They also have the added bonus of measuring mosfets and resistors and are significantly cheaper.

Sorry my bad, eyes arent what they use to be lol, I did mean D9, is it meant to look that messy?? Lol

The small green capacitor you mention under the word HOT is number C10, and is a 22uf 50v 105 degrees celcius


That C12 is badly dented in on the top, I dont know if its been psysically damaged in the past of TV has been opened up before somehow or what, as I dont understamd how it could look like this?? I thought bad caps domed and bulged, not sank in lol
Bloopeta is offline   Reply With Quote
Old 11-19-2019, 10:50 PM   #10
Bloopeta
Badcaps Veteran
 
Join Date: Jun 2018
City & State: Hartlepool
My Country: United Kingdom
I'm a: Knowledge Seeker
Posts: 213
Default Re: LOGIK L32HED13 LED TV Intermittent wont turn on

Quote:
Originally Posted by diif View Post
What is the value of the small green capacitor in photo 3 at the bottom of the PCB under the word HOT.
Unfortunately I dont have any way of testing capacitors, I only have a basic DMM and dont think I can do anything regarding capacitors with it.
I have attached a pic of the one I have
Attached Images
File Type: jpg 20191120_044822.jpg (450.9 KB, 4 views)
Bloopeta is offline   Reply With Quote
Old 11-19-2019, 10:54 PM   #11
Bloopeta
Badcaps Veteran
 
Join Date: Jun 2018
City & State: Hartlepool
My Country: United Kingdom
I'm a: Knowledge Seeker
Posts: 213
Default Re: LOGIK L32HED13 LED TV Intermittent wont turn on

Quote:
Originally Posted by nomoresonys View Post
Wonder if those cheap esr meters are any good on ebay.
some on there are very cheap, would be worth picking one up of they are any good definately
Bloopeta is offline   Reply With Quote
Old 11-20-2019, 05:17 AM   #12
nomoresonys
Badcaps Veteran
 
Join Date: Jan 2013
City & State: midwest
My Country: U.S.
I'm a: Knowledge Seeker
Posts: 4,423
Default Re: LOGIK L32HED13 LED TV Intermittent wont turn on

That first one has a good price, maybe some members here have it and can advise, might be some reviews on amazon or someplace.

Last edited by nomoresonys; 11-20-2019 at 05:18 AM..
nomoresonys is offline   Reply With Quote
Old 11-20-2019, 05:24 AM   #13
Bloopeta
Badcaps Veteran
 
Join Date: Jun 2018
City & State: Hartlepool
My Country: United Kingdom
I'm a: Knowledge Seeker
Posts: 213
Default Re: LOGIK L32HED13 LED TV Intermittent wont turn on

Quote:
Originally Posted by nomoresonys View Post
That first one has a good price, maybe some members here have it and can advise, might be some reviews on amazon or someplace.
Yeah theyre the ones I was looking at, cant go wrong for the price if they are any good
Bloopeta is offline   Reply With Quote
Old 11-20-2019, 06:00 AM   #14
diif
Badcaps Veteran
 
Join Date: Feb 2014
City & State: Midlands
My Country: England
I'm a: Professional Tech
Posts: 4,367
Default Re: LOGIK L32HED13 LED TV Intermittent wont turn on

There are plenty of posts on here about them. Anyone half serious about fixing has some way of measuring ESR. That's ignoring all of the other features of them and the fact if you buy a kit version you get the satisfaction of building your own tool. Follow the calibration instructions and the accuracy is pretty decent when compared with other more expensive meters.
diif is offline   Reply With Quote
Old 11-20-2019, 06:13 AM   #15
nomoresonys
Badcaps Veteran
 
Join Date: Jan 2013
City & State: midwest
My Country: U.S.
I'm a: Knowledge Seeker
Posts: 4,423
Default Re: LOGIK L32HED13 LED TV Intermittent wont turn on

Yep, nothing worse than trying to guess if a cap is ok or not.
nomoresonys is offline   Reply With Quote
Old 11-20-2019, 07:56 AM   #16
diif
Badcaps Veteran
 
Join Date: Feb 2014
City & State: Midlands
My Country: England
I'm a: Professional Tech
Posts: 4,367
Default Re: LOGIK L32HED13 LED TV Intermittent wont turn on

Quote:
Originally Posted by nomoresonys View Post
Yep, nothing worse than trying to guess if a cap is ok or not.
Why guess when meters are so cheap. Those that fix have a way to measure ESR, those that don't either don't fix or don't know about them.
diif is offline   Reply With Quote
Old 11-20-2019, 07:59 AM   #17
nomoresonys
Badcaps Veteran
 
Join Date: Jan 2013
City & State: midwest
My Country: U.S.
I'm a: Knowledge Seeker
Posts: 4,423
Default Re: LOGIK L32HED13 LED TV Intermittent wont turn on

Indeed, it's cheap enough to have around even if you very seldom need to fix any electronics, plus it's small.

Last edited by nomoresonys; 11-20-2019 at 08:01 AM..
nomoresonys is offline   Reply With Quote
Old 11-20-2019, 09:02 AM   #18
Bloopeta
Badcaps Veteran
 
Join Date: Jun 2018
City & State: Hartlepool
My Country: United Kingdom
I'm a: Knowledge Seeker
Posts: 213
Default Re: LOGIK L32HED13 LED TV Intermittent wont turn on

Quote:
Originally Posted by diif View Post
Why guess when meters are so cheap. Those that fix have a way to measure ESR, those that don't either don't fix or don't know about them.
Quote:
Originally Posted by nomoresonys View Post
Indeed, it's cheap enough to have around even if you very seldom need to fix any electronics, plus it's small.


I have ordered one up, I had no idea they were so cheap until now

Last edited by Bloopeta; 11-20-2019 at 09:07 AM..
Bloopeta is offline   Reply With Quote
Old 11-20-2019, 09:05 AM   #19
Bloopeta
Badcaps Veteran
 
Join Date: Jun 2018
City & State: Hartlepool
My Country: United Kingdom
I'm a: Knowledge Seeker
Posts: 213
Default Re: LOGIK L32HED13 LED TV Intermittent wont turn on

Quote:
Originally Posted by R_J View Post
I would remove the power supply board and inspect the solder connections espectially on the transformer pins etc.
Have removed and inspected the rear, would appear 2 diodes have been replaced before.

C8 can be wiggled quite a bit, but doesnt show on solder connection on rear of board
Attached Images
File Type: jpg 20191120_145959.jpg (680.9 KB, 6 views)
File Type: jpg 20191120_150133.jpg (524.1 KB, 2 views)
Bloopeta is offline   Reply With Quote
Old 11-20-2019, 09:59 AM   #20
nomoresonys
Badcaps Veteran
 
Join Date: Jan 2013
City & State: midwest
My Country: U.S.
I'm a: Knowledge Seeker
Posts: 4,423
Default Re: LOGIK L32HED13 LED TV Intermittent wont turn on

Looks like you have some bad solder joints, look by R57, can check youtube for how bad/cold solder joints look, sometimes they look good but are not, can also look very closely at the resistors from the bottom, sometimes there just a tiny pinhole in m that's hard to see.

Last edited by nomoresonys; 11-20-2019 at 10:03 AM..
nomoresonys is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Badcaps.net Technical Forums 2003 - 2020
Powered by vBulletin ®
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 03:32 AM.
Did you find this forum helpful?