Re: LCD TV and Monitor basic troubleshooting guides
Buck converter constant current LED driver topology.
https://cdn.badcaps-static.com/pdfs/...019082cabf.pdf
LCD TV and Monitor basic troubleshooting guides
Collapse
This is a sticky topic.
X
X
-
Re: LCD TV and Monitor basic troubleshooting guides
When your 5 Band Resistor is not a 5 Band resistor.
https://forum.digikey.com/t/when-you...-resistor/1501Leave a comment:
-
Re: LCD TV and Monitor basic troubleshooting guides
Learn about diode and other semi.
https://toshiba.semicon-storage.com/.../discrete.html
https://toshiba.semicon-storage.com/...ledge/faq.htmlAttached FilesLast edited by budm; 08-09-2020, 06:25 PM.Leave a comment:
-
Re: LCD TV and Monitor basic troubleshooting guides
My old Video lab (I also had Audio lab for testing audio products too) for R&D Development, test, products validation, failure analysis, compatibility with Sources and Sinks validation in conjunction with TV/Display manufacturers. 8K products were in the process when I was laid off due to 'making company look good and lots of profits by laying off people before selling the company'. I have been with them for 25 years!
Right now I am just glad not have working 10 ~12 Hours a day.Last edited by budm; 08-06-2020, 05:39 PM.Leave a comment:
-
Re: LCD TV and Monitor basic troubleshooting guides
ROHM TechWeb: https://techweb.rohm.com/tech-info/Leave a comment:
-
Re: LCD TV and Monitor basic troubleshooting guides
Thank you for pointing me in the right direction BudmLeave a comment:
-
Re: LCD TV and Monitor basic troubleshooting guides
You need to make a thread for you TV, make sure to put down the Make and model number, also attach good clear pictures of the whole backside of the TV showing all the boards.Leave a comment:
-
Re: LCD TV and Monitor basic troubleshooting guides
Need advice...65" samsung, vertical colored lines at first, then a white/grey garbled flashing screen. I think it's the T-Con board.
Not sure if I can post a pic of the screen, bit if someone is willing to look at it, I could email.Leave a comment:
-
Re: LCD TV and Monitor basic troubleshooting guides
LED Vf vs If graph, thanks to ngth82
See the story here to see why it is important to get the spec of the LED from seller: https://www.badcaps.net/forum/showth...867#post928867Last edited by budm; 12-01-2019, 11:30 PM.Leave a comment:
-
Re: LCD TV and Monitor basic troubleshooting guides
LED failure mode.Attached FilesLeave a comment:
-
Re: LCD TV and Monitor basic troubleshooting guides
Thank you very much for this postLeave a comment:
-
Re: LCD TV and Monitor basic troubleshooting guides
Understanding NTC rating.Leave a comment:
-
Re: LCD TV and Monitor basic troubleshooting guides
T-CON Voltages:
http://tvrepairsolution.blogspot.com...lcd-panel.html
http://tvrepairsolution.blogspot.com...l-rowgate.html
https://lapputerservice.com/2019/04/...d-there-point/
https://cdn.badcaps-static.com/pdfs/...e59a54365e.pdfLast edited by budm; 09-18-2019, 12:37 PM.Leave a comment:
-
Re: LCD TV and Monitor basic troubleshooting guides
Backlights PWM.
https://www.tftcentral.co.uk/article...modulation.htmLeave a comment:
-
Leave a comment:
-
Re: LCD TV and Monitor basic troubleshooting guides
Typican T-CON Voltages:
1. Vin: 12V (we confirmed as present)
2. Vdd (Vlogic, Vddd): 3.3V
3. Vda (Vs, Vsource, Vdda Avdd): 14V to 20V
4. Vgh (Vgon, Von, Vddg): 20V to 30V
5. Vgl (Vgoff, Voff, Veeg): -5V to -7VLeave a comment:
-
Re: LCD TV and Monitor basic troubleshooting guides
Thank you very muchLeave a comment:
-
Re: LCD TV and Monitor basic troubleshooting guides
Vestel Powerboard 17ips71Attached FilesLeave a comment:
-
Re: LCD TV and Monitor basic troubleshooting guides
Vestel Powerboard 17ips55Attached FilesLeave a comment:
-
Re: LCD TV and Monitor basic troubleshooting guides
thank for infor shareLeave a comment:
Related Topics
Collapse
-
by momakaNormally, I never post repairs this quick after I do them, because… I am usually very slow.
But today, I’m making an exception here. Why? No idea. Perhaps only because the repair details are still “fresh” in my head… which is ironic, given this is a 16 year old monitor that hardly anyone will care about today. It is new to me, though.
I picked it up last November from someone on my local Craigslist. It wasn’t very close to where I live, but was close to a family friend that I had to go visit anyways. So after watching the posting on Craigslist for a few weeks and seeing it getting...
-
Channel: Troubleshooting Computer Displays
-
-
by wattageHello Badcaps Community,
I purchased a preowned AOC monitor that is not working and out of warranty. It was sold as not working. I am looking for guidance on self-repair. In particular, I am after the firmware for the monitor. At the end, I have included monitor model information and links to pics and vids of the issue.
The problem is that it will not display a picture on any of its inputs. And the on-screen menu does not appear. The power button works properly. It powers on with the remote as well. But the on-screen menu does not appear, even when not connected to any...-
Channel: Troubleshooting Computer Displays
-
-
by Rick_1234Good evening, gentlemen.
I have a problem with my monitor. It turns off after a few seconds or flickers. Shining a flashlight on the screen doesn't show any image, so I guess it's not the "2 seconds to dark" I read in the forum.
To turn it back on, I have to press the power button twice. Then after a few seconds it turns off again or flickers. See video.
https://drive.google.com/file/d/1L6S...ew?usp=sharing
Things I tried
- Bought a new AC adapter thinking that was the problem but the problem...-
Channel: Troubleshooting Computer Displays
-
-
by momakaLooking through my repair pictures and notes, it's been a long time since I posted anything in the LCD monitors section. So here goes that.
I'm dedicating this thread to one of the very first LCD monitors I repaired (if not the first one), which was more than 10 years ago now. The monitor is a Wise Wing, model F199. It's a 19” CFL-backlit LCD. I got it for free off of Craigslist in 2009 from a guy, who said he bought it for cheap from Wallmart and the monitor worked only for a little less than 2 years before quitting.
When I saw the Craigslist post, I wasn't...-
Channel: Troubleshooting Computer Displays
-
-
by sew333My pc:
10850K stock 4800mhz stock Kraken X73 good temps
2x16 GB DDR4 GSKILL 3000mhz XMP
Seasonic Tx-850 Ultra Titanium
Gigabyte Rtx 3090 Gaming OC
Aorus Z490 Pro Gaming
1 TB SSD
4 weeks ago i launched Metro Exodus Enhanced and during cinematic advertisement part ( 30 fps ), pc just shutdown.
Also monitor flickered with NO SIGNAL 10 seconds after shutdown. So only monitor and pc was affected.
Next i pressed only power button, rebooted again and its fine again. Happened once and i cant reproduce.
Power... - Loading...
- No more items.
Leave a comment: