Just been trying to fix an LG 37LC55 and found that this component is faulty, after about 10 minutes of being on an assortment of horizontal lines appear on the screen, this then leads to colour haloing, colours going weird, even the sound can cut out if a big bang happens(that would be GTA4). I found if using cold spray directly on the component that the lines would go, it will still leave the haloing, colour distortion etc but the lines do go only to return as the component heats up again, pressing the reset button on the main board will clear the haloing and colour distortion. I did try re-soldering it and this seemed to help extend it's usability but only by a few minutes, so it would need replacing, I just haven't a clue as to what it is so if you can help, that would be great, thanks, Andy.
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Re: What is an EH14A 737J58?
Post a good clear picture of the component and mark it on the board. Also give us the Part Number of the board it is on and the Model Number and brand of the tv the part is out of.
I tried running different variations of the number you gave and none hit for a datasheet.Have you ever stopped to think and then forget to start thinking again?
As a very wise man once said on this forum: "Of all the things I have lost I miss my mind the most."
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Re: What is an EH14A 737J58?
Ok, do you have a DMM?
If so set it to DCV and place black lead on a ground screw and red on each of the legs in turn. Report readings back here. Number pins 123 left to right with large flat tab at top. You are reading voltages so boards need to be powered up. Be very carefull around the board where the power input is. Try not to touch anything on the power board.
Those regulators are frequently bad. They are pretty easy to replace. There is a thread that talks you through testing and what to expect. I will try and find it and get back to you with the address.Have you ever stopped to think and then forget to start thinking again?
As a very wise man once said on this forum: "Of all the things I have lost I miss my mind the most."Comment
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Re: What is an EH14A 737J58?
This is the location of the testing info for the LDO Regulators. Read it before doing anything. Also have you done a search of your model # in this section. You will get a lot of good information just by reading other peoples posts and the solutions they found.
https://www.badcaps.net/forum/showthr...999#post300999
Hope you get it repaired.
Have you ever stopped to think and then forget to start thinking again?
As a very wise man once said on this forum: "Of all the things I have lost I miss my mind the most."Comment
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Re: What is an EH14A 737J58?
So it is the 2.5V fixed regulator, looking at it with the big tab up (same as the pin 2 middle pin), meter's probes at the big tab and ground should show 2.5V, pin 3 (right) is the input pin. pin1 (left)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
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Re: What is an EH14A 737J58?
Been researching this one a little more and found that another Voltage regulator is acting the same, it's a FAN1587AD33X, a 3A low dropout voltage regulator, yet again if I spray cold spray over it the horizontal lines go temporarily only to appear again after a few seconds, I've also noticed that if I play a standard DVD signal through the phono connectors on the side the lines are very much subdued compared to an HDMI signal, indeed if the said DVD player is allowed to fall back to it's start up screen the lines are there in abundance??? I can only think it's an amperage issue as both regulators output the voltages at their stated values whether warm or cold, indeed it could be something else that I'm not aware of but I just don't know, I would have to suspect the voltage regulators otherwise why would they react as they do to the cold spray, if any one can help any further I'd be very grateful, thanks again, Andy.
Both Voltage Regulators are in very close proximity to each other, possibly on the same circuit.Comment
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Re: What is an EH14A 737J58?
It can possibly be the filter caps at the input and the output of the regulator, the regulator may be oscillating due to bad caps.
This is one way to look for bad filter caps if you do no have scope, but have to have good meter.
https://www.badcaps.net/forum/showthread.php?t=31410Last edited by budm; 10-30-2013, 09:13 AM.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
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Re: What is an EH14A 737J58?
I had a suspicion about the caps but I'm no expert so thank you for the pointer, I shall probably just try and trace back to the voltage regulator's origin of power and just change them all out along that path as I have no setting to test them with, I can get a replacement board for Β£25 so for the purposes of experimentation I can go with that idea, thanks again, Andy.Comment
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Hello, I have a screen in where sometimes when I open it pop-up vertical multicolor lines (I would say the most of them are green). If I tun off and turn on the screen the lines dissapear or if I leave open the screen after approximately five minutes the lines gone. I measured the below voltages on the main PCB and on the T-CON board and the voltages are the same when it doesnβt display the vertical lines and when it displays the vertical lines. Also, I cleaned all the connectors very good with IPA. I moved back and forth the connectors and the COF tabs but the vertical lines didn't displayed... -
Hi all
I have lines on the screen...which is an age old problem that can be remedied by watching Youtube videos and getting out the tape.
My issue (after successfully fixing a different sammy tv with a separate tcon board and isolating the side of the panel...):
This tv has an integrated tcon...so it is a bit more confusing when trying to isolate the clocks.
It has a c ribbon and i have taken each end out to see if that will isolate the lines. instead, it makes it much worse ALL over the tv!
So....i don't know what end of the C ribbon to work with... -
Hello,
First of all I'm new here. While looking I found this amazing forum and I'm very happy I did. Now for my problem:
I picked up a Samsung UHD QLED QE50Q67TAU from 2021 for $50 knowing it was defective. The seller said it had black lines and that it could get stuck in boot randomly.
I've tried a new power cable, hard reset, opening up and jiggling all cables, pressing everywhere to see if I get a reaction but I've gotten nothing. I've tried the tape method but I've only managed to get the lines worse.
I'm no expert but I've done the tape... -
Hi, I have a Sony XBR-65X750D that has horizontal lines at the bottom 6 inches of the screen. These lines appear to be every other line because the picture is still quite visible behind those lines. The lines appear all the time with a few other lines above and below the 6 inch level blinking on and off at about 2 second intervals. I'm not sure if this is a panel issue or power supply/main board problem. I did replace the T-Con board without any change in the problem. Any suggestions you might have would be greatly appreciated. Thanks, -
I just acquired this 3D LED yesterday and it has horizontal lines on a little more than half of the screen. When I first turn it on it has thin black lines going across that makes the image look serrated, and then shortly after patterns of thicker red lines fade in. If I turn it off and right back on it will reset to just the black lines and the red will again fade onto the screen.
I initially thought tab bonds, but flexing the bezel makes no difference, and the fact the image sort of resets after cycling power is different. I haven't opened it up yet to actually test applying...
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