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Thread Tools | Display Modes |
05-18-2015, 09:00 AM
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#181 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
LED backlights bypass using Diode 1N4007.
http://www.badcaps.net/forum/showthread.php?t=46403
__________________
Never stop learning Basic LCD TV and Monitor troubleshooting guides. http://www.badcaps.net/forum/showthr...956#post305956 Voltage Regulator (LDO) testing: http://www.badcaps.net/forum/showthr...999#post300999 Inverter testing using old CFL: http://www.badcaps.net/forum/showthr...er+testing+cfl Tear down pictures : Hit the ">" Show Albums and stories" on the left side http://s807.photobucket.com/user/budm/library/ TV Factory reset codes listing: http://www.badcaps.net/forum/showthread.php?t=24809 |
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05-18-2015, 05:22 PM
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#182 | |
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Lauren
Join Date: Sep 2014
City & State: North Adams MA
My Country: United States
Line Voltage: 120VAC, 60Hz
I'm a: Knowledge Seeker
Posts: 2,554
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Re: LCD TV and Monitor basic troubleshooting guides
Quote:
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05-22-2015, 03:20 PM
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#183 |
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Senior Member
Join Date: Jun 2013
City & State: Issaquah, Wa
My Country: USA
I'm a: Knowledge Seeker
Posts: 167
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Re: LCD TV and Monitor basic troubleshooting guides
Thanks...would be nice if you could include what each video link is "about", though!
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06-09-2015, 11:53 AM
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#184 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
Samsung EEPROM reset:Samsung LE37A556P1F Flashing red light
http://www.badcaps.net/forum/showpos...0&postcount=77 "8 pin SMD EEPROM on the bottom of the board, close to where the CI card slot is. Most of the time it's from Atmel, so it will have ATML followed by a cryptic datecode in the first line. 2nd line should be either (AT)24C256B or "2EB1" (which is Atmel's cryptic way of saying it's a 24C256B) You need to short out the clock and data pins (pin 5 and 6). Even without the datasheet handy they're easy to identify cause they always have 100ohm SMD resistors connected to them. Otherwise see attached pic. Solder 2 relatively long wires to those pins and put the board back in place and connect it all up. Plug the powercord in and when it tries to start up (blinking power LED), short those wires for a few secs. Might take a few tries. Unplug the set, remove the short and grab your remote. Now plug it in again. It should stay in standby.. If not, try turning it off (solid LED). Then start the TV up in service mode. You do this with the remote. In order, press INFO, MENU, MUTE, POWER. The TV should start up and display the service menu on top of everything else. Go into the "Option table" menu, make sure "Tuner" is set to AUTO and "Store Demo" is OFF (use the arrow keys and enter, menu button goes back). Then do a Factory Reset. TV should turn off after a while." |
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06-22-2015, 11:40 AM
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#185 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
Samsung LN46A500T1FXZA: power cycling: bad C102 on main board
http://www.badcaps.net/forum/showthr...LN46A500T1FXZA |
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06-24-2015, 11:46 AM
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#186 |
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New Member
Join Date: Jun 2015
City & State: Prijedor
My Country: Bosnia
I'm a: Knowledge Seeker
Posts: 2
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Re: LCD TV and Monitor basic troubleshooting guides
Thanks alot @Budm
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06-26-2015, 10:23 PM
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#187 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
Samsung BN44-00265A/B
http://www.badcaps.net/forum/showpos...57&postcount=7 Per TOM66: Consider JP852/JP854 jumper cut - can help solve flickering backlight but maybe also no backlight? |
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07-06-2015, 12:01 PM
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#188 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
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Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
http://www.badcaps.net/forum/showthr...ps+blow&page=2
Just FYI for caps blowing even at correct Voltage. |
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07-06-2015, 04:05 PM
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#189 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
Another example of why the new caps on the power supply board go bad:
http://www.badcaps.net/forum/showthr...615#post572615 |
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07-08-2015, 08:57 AM
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#190 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
Sony Bravia KDL-32XBR4 324046whc6lv2.2 TCON fix.
Multiple color lines on the screen. http://www.badcaps.net/forum/showthr...034#post573034 |
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07-13-2015, 09:27 AM
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#191 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
LN46A750r1F no backlight due to PWM line stuck low.
Solved by paulstef: http://www.badcaps.net/forum/showthr...180#post574180 |
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07-14-2015, 01:46 PM
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#192 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
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Line Voltage: 120V 60Hz
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Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
Service bulletin for PHILIPS, MAGNAVOX, EMERSON blowing main fuse, thanks to JDC.
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07-17-2015, 03:27 PM
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#193 |
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Badcaps Veteran
Join Date: Feb 2010
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Re: LCD TV and Monitor basic troubleshooting guides
I do not know why the post comes on twice, ADMIN please delete one of them, thanks.
SONY TV LCD panel/T-CON listing from year 2010. Last edited by budm; 07-17-2015 at 03:29 PM.. |
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07-17-2015, 03:37 PM
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#194 |
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New Member
Join Date: Jul 2015
City & State: Minneapolis MN
My Country: USA
I'm a: Knowledge Seeker
Posts: 12
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Re: LCD TV and Monitor basic troubleshooting guides
Outstanding guides!!
Just got an element TV with white coloration. You can see menus and what not. Will do the testing but after a very basic review of the guys my gut tells me it is possibly the Tcon board. Thank you for your hard work! |
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07-17-2015, 03:45 PM
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#195 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
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Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
You should start a new tread with the make and model, the pictures of what is showing on the screen, the pictures of the whole backside of the TV. It sounds like you have bad GAMMA IC problem on the T-CON that will cause washed out pictures on the screen.
Washed out picture samples of bad GAMMA IC on the T-CON board. Last edited by budm; 07-17-2015 at 03:57 PM.. |
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07-17-2015, 04:39 PM
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#196 |
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Badcaps Veteran
Join Date: Feb 2010
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Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
The Anode of the LED string is connected to the output of the boosted converter, the Cathode of the last LED string is connected to the Drain of the PWM MOSFET, the SOURCE pin is connected to one end of the current sensing resistor, the other end is then connected to the boosted converter ground return.
The example shows 4 strings, two strings are connected in series to form one long string, so there are two long strings with two LED drivers. |
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07-28-2015, 09:03 AM
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#197 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
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Re: LCD TV and Monitor basic troubleshooting guides
LED backlights troubleshooting video by NORCAL715
https://www.youtube.com/watch?v=hh3z_dkkcUM&app=desktop |
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07-28-2015, 09:09 AM
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#198 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
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Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
VIZIO E320-A0 EEPROM replacement video by norcal715.
https://www.youtube.com/watch?v=Sghh8BK5zIw |
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07-28-2015, 09:12 AM
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#199 |
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Badcaps Veteran
Join Date: Feb 2010
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Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
Samsung LN32B360 Voltages and Troubleshooting video by norcal715
https://www.youtube.com/watch?v=ocqnqmBxiqY |
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07-29-2015, 11:14 PM
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#200 |
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Badcaps Veteran
Join Date: Feb 2010
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Re: LCD TV and Monitor basic troubleshooting guides
Sony AZ-1K CTV-61 Training manual
http://www.badcaps.net/forum/showthr...highlight=AZ1K KDL-xx EX400 |
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