Re: LG 55LW5600 No Video No Sound
Here's a pic....
mtskibum16
Member
Last Activity: 10-16-2018, 11:30 AM
Joined: 07-27-2018
Location: Bremerton, WA
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Re: LG 55LW5600 No Video No Sound
This is the best I could do. Do you need more of the area or is that good? FYI pin1 looks more like pin 8 than the picture shows. I think that's mainly light pollution making pin 1 look blown out....Last edited by mtskibum16; 07-31-2018, 10:44 PM.Leave a comment:
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Re: LG 55LW5600 No Video No Sound
I verified the number. It is correct. Both of those numbers are printed on the top of IC505 (one above the other). Z1024DI/ZA1012. I'll try and get a pic when my wife gets home. I don't think I have a camera that will get a very close and detailed pic....Last edited by mtskibum16; 07-31-2018, 06:50 PM.Leave a comment:
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Re: LG 55LW5600 No Video No Sound
As mentioned in the original post, I did the heatgun method and oven method to try and reflow the board initially with no success. What is the best method to do this? I followed advice from a few different sources I found around on the interwebz. Like for the oven - what temp and for how long? The heatgun really made me kind of nervous....Leave a comment:
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Re: LG 55LW5600 No Video No Sound
Is it safe to say the main board is the problem? I'd be willing to replace that (if I can find one) to get this back up and running.Leave a comment:
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Re: LG 55LW5600 No Video No Sound
That's with the TV unplugged. It was higher when it was plugged in (but off).Leave a comment:
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Re: LG 55LW5600 No Video No Sound
Added the numbers in the quote....Leave a comment:
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Re: LG 55LW5600 No Video No Sound
When I just read it my meter showed 13.0 with the black probe on pin 1 and 13.6 with the black probe on pin 8....Leave a comment:
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Re: LG 55LW5600 No Video No Sound
Plugged in (but off): 162.5 ohms
Not plugged in: 12.3 ohms
I'll have to bring an inspection glass home from work tomorrow for the part number. I can't make it out with the naked eye. My wife thinks it's as follows, but I'll verify tomorrow.
Z1024DI
ZA1012Leave a comment:
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Re: LG 55LW5600 No Video No Sound
This is assuming counter clockwise around the component from pin 1 marked with the dot on page 74....Leave a comment:
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Re: LG 55LW5600 No Video No Sound
Picture of the mainboard is pic 3 in post 3. I can get better pics of anything specific. Also page 71 of the link you posted has details on it. I'm working on reading through that.
I have attached the readings for Q504 with the TV off and TV on....Last edited by mtskibum16; 07-29-2018, 01:26 PM.Leave a comment:
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Re: LG 55LW5600 No Video No Sound
Ok, I jumped DVR-ON to 3.5v and Power-On to 3.5v. Plug the TV in to the wall and the back lights come on and stay on.Leave a comment:
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Re: LG 55LW5600 No Video No Sound
Ok I'll try that and read through the info. There are two connectors going from the power board to main board. Do I disconnect both or only the connection P201 I posted?Last edited by mtskibum16; 07-29-2018, 11:30 AM.Leave a comment:
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Re: LG 55LW5600 No Video No Sound
I don't see the screen. Just got the room nice and dark and inspected again with a flashlight. I don't see anything.
I tried unplugging the main board and the TV doesn't turn on. I read somewhere about jumping certain pins (maybe with a resistor?) to get the backlights to come on.
So what is the most logical way to diagnose this? Is the no standby light and or the blinking red light in startup any indication of anything?Leave a comment:
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Re: LG 55LW5600 No Video No Sound
This is the connector discussed above. Hopefully that means something to you guys....Leave a comment:
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Re: LG 55LW5600 No Video No Sound
Thank you for the info! SO on the wire entrance side, there are two rows of wires (so 24 total). Are the even pins the top or bottom row of wires? I hope that makes sense....Leave a comment:
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Re: LG 55LW5600 No Video No Sound
I have attached some pictures of the set. In your example, are those readings on each end of the ribbon or what? I was a bit confused on what the tho columns meant. At any rate, the only that jumped out as odd to me was the last one. Labeled as 24v and I measured 3.3v....Last edited by mtskibum16; 07-28-2018, 02:13 PM.Leave a comment:
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LG 55LW5600 No Video No Sound
I'll start by saying I'm not much of a techy, but my TV is dead and thought I'd pull the thread of repairing it. So keep in mind my electronics knowledge is very limited.
I've spent the last few days reading threads and doing research on what might be wrong with my TV. I did try a reflow (both heat gun and oven) of the main board based on a number of people with similar symptoms with no change.
So there is no "standby light" on when the TV is just plugged in but off. I believe there used to be but I can't be 100% sure. When I turn the TV on (touch panel... -
Re: New Members - please post your introductions here
New member here. LG 55LW5600 TV just died, so I'm trying to learn something new and fix it. This seemed like a great spot to do it. Looks like I needed an intro to be able to post a thread.Leave a comment:
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