At school now, but I will test this when I get home. So put a positive on 1 and neg on 7? Then so on?
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newkidontheblock
Member
Last Activity: 07-26-2020, 10:51 AM
Joined: 02-16-2018
Location: Burlington, KY
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Re: 42LK450-UB Noob question
At school now, but I will test this when I get home. So put a positive on 1 and neg on 7? Then so on?...
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Re: 42LK450-UB Noob question
I did get a new inverter board and it did not solve any problems....Leave a comment:
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Re: 42LK450-UB Noob question
I doubt it helps, but when the screen was on during a previous jump, with a full white screen, I had no dark spots. But it was only on for a few secondsLeave a comment:
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Re: 42LK450-UB Noob question
it is OZ 9937GNLeave a comment:
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Re: 42LK450-UB Noob question
yes all new equipment....Leave a comment:
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Re: 42LK450-UB Noob question
Disconnected inverter board but I did not have any 100 ohms resistors near buy. RIP Radio Shack. I took a 1k and put it on the Error and Ground of the power supply while everything else is connected and the TV stayed on. I left it sit for about 40 seconds then removed the resistor and the TV instantly turned off on its own.
What now?...Leave a comment:
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Re: 42LK450-UB Noob question
with the inverter board connected as well or no?Leave a comment:
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Re: 42LK450-UB Noob question
well when the inverter board was disconnected, the tv did the same thing it always did. Cycle a few times and then shut off. So, even with the inverter board disconnected it still just shuts down after about 10 seconds. So what would you like me to do? I know it says to pull the inverter error signal pin, but you mean just pull it out of the harness? im really sorry.Leave a comment:
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Re: 42LK450-UB Noob question
So before i unplugged the inverter only, i checked to see what the tv did. The power button will pulse to blue about 3 times, then fade to red meaning the TV was off. Then, i unplugged the inverter and put the main board back on, and it did the same thing. Doing this made me think it is not the inverter at fault here.
AND i was right. Changed to the new inverter, problem is still there....
now that i am all discouraged, any other ideas? There seems to be nothing else that would cause this issue to me. TV...Leave a comment:
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Re: 42LK450-UB Noob question
The only thing that was connected to the power supply while I did the test was the inverter board. The main board was dissconnected (as well as the controls like volume and what not because that was attached to the main board) and the T-conn board gets its power from the main board as well. So only the power supply and the inverter board were the only things attached.
And yes, I do have all the original boards. I intend on doing these tests on them as well when i get it working to sell later. Why do you ask?...Leave a comment:
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Re: 42LK450-UB Noob question
I did try with a jumper on the A-dim and P-dim as well to see if the results change. The test yielded the same results both times....Leave a comment:
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Re: 42LK450-UB Noob question
Thanks for the heads up. I was watching the video and they have the combo board. I figured I didnt even want to go down that road....Leave a comment:
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Re: 42LK450-UB Noob question
Now while the screen was out, i did do the flashlight to make sure it wasnt just the light itself going out. There was no picture while the screen went off, like it legitimately just turned off and back on four times. So I dont think it is the bulbs themselves or the picture would still be visible without the light right?
Also, how would a bulb being out cause the whole screen to go out? Being as the picture would actually go out entirely versus just the light, that is why i was leaning on the main board. But when i did the resistor test,...Leave a comment:
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Re: 42LK450-UB Noob question
Well like I said its only like $25, so its not the end of the world. I just wanted to be sure not to keep throwing money at it.
Now on a follow up question, you are not the first person to mention a lamp. While i may be ignorant, what do you mean? I keep thinking the only TV's with the actual bulb in it, but what "lamp" would this tv have?
Thanks againLeave a comment:
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Re: 42LK450-UB Noob question
Ok, sorry for the delay. I have no electronic hobby stores near me at all so i had to get resistors shipped in........
So i jumped the pins on the opposite end of the connector from the power supply (just unhooked it from the main board and added resistors where needed, while not having the main board attached to anything)
The screen will come on for about 2 seconds then turn off again never to come on again until i pull power away and give it back (toggle the surge protector)
So if what im reading is correct,...Leave a comment:
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Re: 42LK450-UB Noob question
Ok, so i will get ahold of some 1k resistors and jump to get the backlight to come on and stay on. When i get this done, what will it tell me? Is the point of this just to test the backlight inverter? Obviously its kind of hard to test anything that gets power when it keeps powering back off....Leave a comment:
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Re: 42LK450-UB Noob question
Ok, so by voltages stay the same i meant that when the screen is on, the voltages jumped. But as the backlight went out, the voltages either dropped imediately, or progressed to zero (as in losing power). They would jump back up as the backlight would kick on. The bottom half of my voltage chart on jumped to 24v, but stayed there even when the backlight went out. The 12v's up top as well as the 2 DIM wires jumped with the backlight, as did the ERROR wire. Oddly enough, the ERROR wire would be at around 1.2 while the backlight was on, but then jump to...Leave a comment:
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Re: 42LK450-UB Noob question
Yes, I tested each fuse while the tv was going in and out. They remained at the listed numbers the entire process...Leave a comment:
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Re: 42LK450-UB Noob question
Testing both fuses. Both in AC and DC (because im not sure which on it would be)
In DC, both stayed below .030 both with the TV on or off
In AC, both spiked to .525, but thats it. The fuses on the board say 125v, but i didnt get nearly that....Leave a comment:
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Re: 42LK450-UB Noob question
Really hard to see, my guess. Part number would be
tz.6502x101 B6fy01-03
Piccs
[ATTACH]171728[/ATTACH]
[ATTACH]171729[/ATTACH]Re: 42LK450-UB Noob question
Really hard to see, my guess. Part number would be
tz.6502x101 B6fy01-03
Piccs
[ATTACH]171728[/ATTACH]
[ATTACH]171729[/ATTACH]...Leave a comment:
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