Hello My friend, it is not my wisdom, it is the result of the work of everyone in this forum, I just paid close attention to these discussions and learned.
I am back with some information.
I received the following Samsung model for repair:
UE50AU8072
Mainboard BN41-02844D
Panel CY-SA050HGPY1V
The device was in boot loop without Tizen logo, the motherboard only has a ribbon that connects to the panel and that bridge between the two parts of the panel.
I did the panel test with only the left side connected and noticed those stripes on the image....
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Hp Sure Start Recovery boot loop on HP Elitebook 840 G5
HP Elitebook 840 G5
ProID 2FA66AV
Build ID 17WWCSAT601
Has anyone faced such a situation in the past with laptops that have integrated HP Sure Protect.
I tried to disable it from the bios but I don't have access, to rewrite the bios with a USB disk, it also doesn't work to enter the test menu with the F2 key, the same thing.
I found a video clip on YT where the person in question edits the bios file saved from an HP 450 G7, but I don't understand most of the explanations because they are in Arabic.
Can someone help me with some information?
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In the last 2 months I repaired several devices from the MU, TU and Qled series, all of them were in boot loop with or without the Tizen logo, but I was too lazy or selfish and didn't take pictures of what I did, now I'm sorry because I could help more easily with the respective images.
But now I received for repair a Samsung model 40NU7100 I think, single chassis, which has vertical stripes and after 30-60 minutes it enters the boot loop. I will take pictures of the defect and the steps followed for troubleshooting.
Best regards!​
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You will find these signals on both sides of the display, if you do the jumper test at Tcon, disconnect the ribbon from each side one by one and you will have an image only on the side without a defect. Usually with this type of display as in the attached photo, I check with the measuring device on the resistance field those data and voltage lines one by one, the resistance between any line must not be less than hundreds of k ohms. The test can also be done in tension, but there are no values given by the manufacturer for this, everything depends on how much experience you have and intuition....
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Take a picture of the motherboard and post it here. You have to identify which part of the display has problems, but that's after you post the picture on the forum! It is usually a high consumption on the VGH voltage.​
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Hi learnmore, on this forum there are many discussions about the TV series Samsung TU, Qled and others that have problems with the display.
Take a photo of the two boards where the two ribbons are connected and post them here. I will guide you what to do after I see the two pictures.​
Regards!
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The panel has problems, in some cases I managed to make it work (the devices have been working for two months without problems), but it is not a long-term solution. Read the attached link where the given solution is for bootloo​p [url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-tvs-and-video-sources/3223822-samsung-qn50q60t-lines-on-screen[/url]
Post also mainboard photos and and panel board with COF.https://The panel has problems, in s...problems), but
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The panel has problems, in some cases I managed to make it work (the devices have been working for two months without problems), but it is not a long-term solution. Read the attached link where the given solution is for bootloop [url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-tvs-and-video-sources/3223822-samsung-qn50q60t-lines-on-screen[/url]https://The panel has problems, in s...link where the...
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See atached picture or folow this link [url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-tvs-and-video-sources/3223822-samsung-qn50q60t-lines-on-screen[/url]https://See atached picture or folow...n-screen[/url]...
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Closed ticket, some Russian (and Romanian) web pages have this file, but what money for it. Thank you for your help.
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Most technicians who repair TVs do not want to reveal these small discoveries because they imagine that some person enters such a forum and everything falls apart and he loses his job! It's a false approach, I learned everything thanks to some people who passed the information on and I will pass it on because I have to do this, like, send a file and I'll help you modify that file so it works for you device. I learned to repair from books published on paper, not from forums.
Be a teacher and teach others to be at the same level as you!​
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(My question is: how do i bridge these two test points on the main board? a wire of some sort between the two points just touching the board? sorry if that is an obvious question but any info here would be greatly appreciated!)
You must use a wire to bridge this two points! The next picture is more relevant!1 Photo
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