Originally posted by Davi.p
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LG 55LF 5800 no video,no sound or backlight
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PIN 4 follow the rail it will goes to the top of the boards and there will be R this R lift one side of it.. 3.3V you have on MB the first DC to DC circuit close to socket which it connect to PSU
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Originally posted by waybel View Post
Are we still going to try this?
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Originally posted by Storyteller12 View PostA reflow on this chip will not work. These boards need the processor replaced.
I believe Nicks TV has done a yt video on these models and the processor problems.
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Most likely a new modification (improvement, modification, with new software...), since the old ones are no longer produced, the difference is one, this is also yours...
https://www.shopjimmy.com/lg-ebt6383...fdGG9wttWjRHAU
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Originally posted by lotas View Post
EAXxxxxxx is the PCB number, different models are assembled on it, look for a paper tag with the number EBTxxxxxx, this will be for your model.
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Originally posted by waybel View PostCould someone tell me what main board will fit this tv.The one that is in it reads EAX65610207 EBT63774501 .The LG site says it should be EBT63838802 .Another site said EAX65610206 Some of these boards are dirt cheap but i don't want to buy one then it doesn't work.Why do i have to keep putting the image verification every time i ask a question on here?
EAXxxxxxx is the PCB number, different models are assembled on it, look for a paper tag with the number EBTxxxxxx, this will be for your model.
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Could someone tell me what main board will fit this tv.The one that is in it reads EAX65610207 EBT63774501 .The LG site says it should be EBT63838802 .Another site said EAX65610206 Some of these boards are dirt cheap but i don't want to buy one then it doesn't work.Why do i have to keep putting the image verification every time i ask a question on here?
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Originally posted by nomoresonys View PostHeating the bga with hairdryer doesn't always get test results so it's not greatly reliable. A diy reflow done PROPERLY shouldn't hurt at all, It's a different process and is not done with a hairdryer: A diy reflow, involves getting the solder under the chip melted so it can reattach to the chip. Pretty straight forward, there's some good how to videos on youtube. Must be careful not to overheat or it will kill the chip, not enough heat and nothing bad will happen, it just won't work is all. They recommend gradual heating then gradually take heat away so as not to thermal shock the chip. Using a temperature gauge would be advised. Need to be extra careful not to blow away or lose any of those little components nearby such as those pesky little mlc caps. Here's a rough idea of the procedure using minimal tools. If one must use a heatgun be very careful with the temps, a lot of them were not meant for the lower temps needed for this kind of work, hot air stations are a much better tool for the job.
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A reflow on this chip will not work. These boards need the processor replaced.
I believe Nicks TV has done a yt video on these models and the processor problems.
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Basically a diy reflow done correctly does no harm, so I do it after doing all the usual
mainboard tests for shorts and voltage etc. and if find no other obvious problems with the board.
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Example here on a graphics chip, same principal: https://www.youtube.com/watch?v=FU84qGSdE-s
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Heating the bga with hairdryer doesn't always get test results so it's not greatly reliable. A diy reflow done PROPERLY shouldn't hurt at all, It's a different process and is not done with a hairdryer: A diy reflow, involves getting the solder under the chip melted so it can reattach to the chip. Pretty straight forward, there's some good how to videos on youtube. Must be careful not to overheat or it will kill the chip, not enough heat and nothing bad will happen, it just won't work is all. They recommend gradual heating then gradually take heat away so as not to thermal shock the chip. Using a temperature gauge would be advised. Need to be extra careful not to blow away or lose any of those little components nearby such as those pesky little mlc caps. Here's a rough idea of the procedure using minimal tools. If one must use a heatgun be very careful with the temps, a lot of them were not meant for the lower temps needed for this kind of work, hot air stations are a much better tool for the job.
Leave a comment:
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