Re: Dell G3 17 3779 - no display after mobo replacement
My bad, don't know why but I thought it's in a different section than it actually is. Anyway, sorry for pestering, promise I'll behave now.
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Any advice at all how to determine if my problem is LCD or motherboard related highly appreciated <3
Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
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Dell G3 17 3779 - no display after mobo replacement
Hi guys,
I have a friend's Dell 3779 that came to me with severely shorted mobo. Did not manage to isolate the cause, most likely that was a bga shorted. Went for a replacement motherboard. Got one from China, apparently it's been tested prior to shipping. The mobo starts up normally but I am getting no display whatsoever.
Tried using external monitor, but being blind I am not sure if laptops goes as far as booting to Windows, a d without it I cannot get hdmi to work. Can't see boot menu options to make sure it boots to Windows. Went ahead and did a blind bios update,...Last edited by mrsith; 04-30-2023, 05:59 AM.
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Re: Samsung UE65KS9000 lines and reboot loop
Hi again folks. I'm clearing my workshop so getting rid of old unrepaired stuff. Had a success with taping 70" Samsung recently, so got extra motivation to get back to this one.
1st of all, I've soldered back the ESD diodes. Checked if the bottom pins aren't shorted with DMM. Top pins are all gnd anyway so didn't check them for shorts.
Tried turning the TV on - it started but I had no picture at all, just backlight. It did reboot after a while so it looked like everything is as it was, and thought I must...
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Re: Samsung UE70TU7100 - flickering horizontal lines
Regular diode mode was enough to locate ckv pins area. Tried covering them in various combinations - every single pin, one by one, in pairs, all of them etc. I've been getting various results but never a perfect picture. Was getting close, but not close enough....
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Re: Samsung UE70TU7100 - flickering horizontal lines
Covering any single pin did not resolve the issue. Tried covering them one by one, all of them, in pairs, random amounts in random combinations. Was getting various results, the best of which was a perfect picture showing every ~5 sec for around 1 second, then getting striped again etc.
I suppose there's not a slightest chance that the issue is actually produced on the other side of panel, which looks fine?
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Re: Samsung UE70TU7100 - flickering horizontal lines
I have found an area on one of the small tapes, interconnecting the panel boards. I have been looking at the side that's striped, obviously. The area, if covered, causes the flickering lines to disappear completely, but the picture is still not perfect - something is definitely off with red colour. I have managed to isolate the issue to one particular pin (see photos - Netflix logo on good side of the screen, Youtube at the bad one).
EDIT: It's not visible very well on photos - red colour seems to be saturated very...Last edited by mrsith; 02-20-2023, 05:05 AM.
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Re: Samsung UE70TU7100 - flickering horizontal lines
File hosters archive videos after 24h. Here's an active link:
[URL="https://www.veed.io/view/f1f8ba6c-5264-4984-a51c-180932257f27?sharingWidget=true&panel=share"]CLICK[/URL]Re: Samsung UE70TU7100 - flickering horizontal lines
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Samsung UE70TU7100 - flickering horizontal lines
Hello again good souls.
Got an UE70TU7100. The TV starts up just fine, but right hand side of the screen is horizontal striped a bit, and there are some flickering horizontal lines on the whole length of the screen. I've seen similar static horizontal lines sometimes, when applying the cut tape method and covering wrong number of pins.
I've cleaned every connector with ipa, tried cut tape method on main LVDS ribbon as well as small ribbons, connecting the panel boards at the bottom. Tried squeezing the bezel and playing around COFs, but no reaction at all. COFs and...
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Samsung UE58TU7100K - no picture, vertical line
Hi.
Got UE58TU7100K with no picture - backlight comes on though. Figured out that's a perfect candidate for cut tape method.
This model has just one LVDS tape coming off main board - and two panel boards underneath the LCD screen are connected to each other via small tape. Like curved screens. I've tried to disconnect half of the screen (5he side without LVDS connector on it, obviously), no joy.
Disconnected the tape (main board side). Applied a small piece of tape, covering first ~4-5 pins. Powered the TV on - got picture. In negative, but that's...
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Re: Sony KDL-55W755C - Dead
I do have a preheater, microscope and a low melt soldering paste, did some tiny cap replacements on iPhones etc so I feel pretty confident with that stuff. Still hate BGAs though. With the pinocut available in #21 I'll try reading/dumping first.
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