Hi , can anyone send me a message to help me fix this LCD TV , because after turning it on, the picture disappears after 20 seconds and the red LED starts flashing. Any ideas? Thanks!
-
-
Re: lcd tv 22ld350-za
Share with us Make and Model of your TV and Clear Pictures of the back of the TV with the covers removed. Also clear pictures of the connectors to and from each board so we could see voltages expected at each pin of the connectors. -
Re: lcd tv LG 22ld350-za
Excuse me I have a little bit problem to edit attachments and how to put the photosAttached Filesif you find these attachements useful please consider making a small donation to the site
Comment
-
-
Re: lcd tv 22ld350-za
Can you take the voltage readings when you first switch on and then when you lose the picture at the connector highlighted and give the names of the pins.Attached Filesif you find these attachements useful please consider making a small donation to the site
Willing to help but I'm no expert.Comment
-
-
Re:LG lcd tv 22ld350-za
Conn P201 on PSU at Stby : 1,2 to Gnd shoud be 15 VDC , measure =16,03V
3,4 = Gnd
5, 6 3,5 V , meas =3,41V
7 = Gnd
8 = OLP meas =0 V
9 = EN m =0 V
10 = BD ( M ) = 0,11V
11 = AD ( M ) = 0 V
12 = NC
At ON ( picture exist ) : 1, 2 to Gnd....................................=14.7V
5,6 ................................... = 3.45 V
8 .................................. = 0V
9 ................................. =0V
10 fluctuation 3,27 ; 2.51 ;0 V ( 3 X )
11 fl. 3,24 ; 1,71 ; 0,15V(3x)
When red LED flashes 1,2 fluct. from 15,75 to 15,85 V
6,7 ...................................= 3,4 V
10 ..................................= 0,11 V
11 ..................................= 0,15 V
I saw backlight becomes black 3 times - when voltage on terminal 10 and 11 fluctuated to 0 V.
All of this within 20 sec.Attached Filesif you find these attachements useful please consider making a small donation to the site
Comment
-
-
Re: lcd tv 22ld350-za
Are you sure that when the backligts are on and you see the images on the the screen, the EN pin stays low? That EN pin is the BL-ON control signal.
BTW, the power supply is an always on power supply and it is OK.
9 = EN m =0 V. EN = BL-ON
10 = BD ( M ) = 0,11V. BD = PWM dimming control.
11 = AD ( M ) = 0 V. AD = Analog Dimming control.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=24809Comment
-
Re: lcd tv 22ld350-za
Hi budm , you are right , signal EN ( P201/9 ) at Stby = 0V , at ON ( when image exist ) = 3.3V , and drops to 0V 3 times within 20 sec and backlight become dark.Then , red LED fleshes and EN = oVComment
-
Re: lcd tv 22ld350-za
It sounds like it may have gone into standby due to no video signal form PC.
Do you have it connected to a running PC?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=24809Comment
-
Re: lcd tv 22ld350-za
Can i upload video clip 25 sec duration , where is showing from picture appeared , 3 times darkness then short time picture and constant darkness with red LED flashes,connected to PC. I think there are some protective mode , but I cant discover causes.I changed 3 elco on PSU on 15 V line for invertor but no effect.Comment
-
Re: lcd tv 22ld350-za
Can i upload video clip 25 sec duration , where is showing from picture appeared , 3 times darkness then short time picture and constant darkness with red LED flashes,connected to PC. I think there are some protective mode , but I cant discover causes.I changed 3 elco on PSU on 15 V line for invertor but no effect.Comment
-
Hi
I aquired a Samsung UE46EH5000 from a lady that said it was turning on and off so she just purchased a new one.
On plugging into the mains and turning on i get a solid red light.
On using the on/off button or remote i just get a flashing red light in a pattern of flash/flash gap flash/flash gap flash/flash etc.
Opened it up and disconnected the main board from the power board by removing the connecting ribbon cable with the hope of getting either a 'no backlight' or a 'working backlight' but got neither,i just got a blinking backlight that turned on and off randomly... -
Hello, Badcaps is my last resort. I am the first owner of the monitor. I reached almost every repair store in my area, but no one even wanted to hear about troubleshooting an old CRT monitor. At this point, I have been trying to figure it out by myself, but I have no idea where to start or look for.
I wish to know how to think and locate a failing component. I will put all my efforts to learn and contribute.
- It started with a bright and greenish picture upon starting a cold monitor.
- About 2 years ago, only on the cold boot, the screen started to occasionally flash with
-
Hello Community!
CASE DETAILS
Promblem Signs: Backlight on 1 sec off 7sec > repeat && Red standby light: 1blink, off 3 sec, 2 blinks, off 5 secs, 2 blinks, off 3 sec, restart cycle
13V present on powerboard output. Backlight continues flashing after removing cables to pannel one at a time and even with both disconnected. NOTE: backlight STOPs flashing and remains on when connector between powerboard and mainboard (note Tcon built in) is disconnected.
Tried inserting firmware on USB and left it in for a few hours, but no change
... -
Hi guys,
I managed to semi-kill an ASRock N100M board after updating Bios from 1.10 to 2.01. It's a zombie now, dead, but not dead.
ASRock N100M special features:
- CPU soldered to board, small Intel 12th gen
- iGPU
- four POST LEDs
Problem after updating Bios to 2.01 using the in-Bios update tool: no picture, no boot.
I am not sure anymore if it booted at least once successfully after updating the bios to 2.01, maybe not, I can't remember. I think it did not.
Symptoms:
- no picture/signal on any of the display connectors,... -
Hi all,
i got this laptop from a repairshop which tried to fix a non booting bios issue but only physically destroyed the mainbios chip. I reprogrammed the bios and also the i2c and EC chip several times but the fault is still the same. I get power LED for 3-5 secs. and the laptop turns off. Charging also works.
Concerning the flashing i don`t know what else to do so i looked for other problems.
My thermal cam shows that the SY8288RAC power ic at PU1801 is the only hotspot (35-40c) when the board is off with battery connected. Adding the power supply i get a cheeping noise...10-25-2025, 07:30 AM
Comment