Re: Samsung un70nu6900 power supply issue
let me check into this and i will let you know.
let me check into this and i will let you know.
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Re: Samsung un70nu6900 power supply issue
Ok.Comment
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Re: Samsung un70nu6900 power supply issue
let me do these steps and ill post my results.Comment
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Re: Samsung un70nu6900 power supply issue
I haven't tried the tape as of yet, but I unplugged the main ribbon cables one at a time again. And tv stay on with blue screen but no picture or sound no matter which ribbon cables undone.Comment
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Re: Samsung un70nu6900 power supply issue
I unplugged the top ribbon cable from the main board turn the tv on, I plugged the ribbon cable back in while the tv was on now it works like it should. have not tried turning off and back on, what do you think the problem could be giving the Fack that its working like new with what I did?Comment
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Re: Samsung un70nu6900 power supply issue
Use a WHITE eraser and clean the contacts on the ribbon cables.Comment
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Re: Samsung un70nu6900 power supply issue
I’ll try this thank you.Comment
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Re: Samsung un70nu6900 power supply issue
I tried to White eraser no luck I replace the ribbon cables with other cables I had for Samsung TV and I get the same results, off on off on but if I replicate what I did I let the TV boot up then plugging in the top ribbon cable I get a picture with no problem. If I turn the TV off and try to just turn it back on it goes back to the off on off Any ideas what I can do to try to fix this.Comment
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Re: Samsung un70nu6900 power supply issue
Thank you Lotas and Capleaker for the help still having the problem described above. If the was panel was bad I wouldn’t think the picture would be perfect when I get to work.Comment
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Re: Samsung un70nu6900 power supply issue
It stay on with no picture when disconnecting one cable at a time if I leave top cable undone until it completely on then put it back I get the picture with no problems. Can leave on all day it doesn't turn off, when I turn it off I have to redo the cable again but will go right back to working.Comment
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Re: Samsung un70nu6900 power supply issue
Well... well... well... I guess she is trying to be a lil b*tch! You probably going to need a 100mhz oscilloscope and a DMM. You can check the LVDS pairs on the main board with the oscilloscope and flick the menu on and off and look for changes on the o-scope screen. Make sure that the main board sends all the appropriate voltages and signals. Then I would check the long skinny board on the bottom of the TV and check for voltages there. You have to figure out which of them 2 boards causing the problem. Note everything down on paper working vs non working. Go from there.
It seems like the TV recovers if you use a specific ribbon. That should tell you on which side of the panel the problem is.
I don't think that it is a panel itself. Maybe take the long skinny board with the tab bonds out in a way so you can inspect it. But be real careful not to damage or rip the tabs.
A main board is no problem to get, but the long skinny board with the tab bonds only comes with the panelLast edited by CapLeaker; 10-16-2022, 04:11 PM.Comment
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Re: Samsung un70nu6900 power supply issue
I just seen your post I have to out but as I’m back I’ll look at what you sent thank youComment
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Re: Samsung un70nu6900 power supply issue
I did the tape on the ribbon cable got it to come on with the remote but the color on the left side is washed out. If I unplug the ribbon cable and plug it back in without the tape I’ll get a full colorful picture no problems as long as the TV is powered up prior to hooking up the top ribbon cable.Comment
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Re: Samsung un70nu6900 power supply issue
I want to thank everyone for help with this, I have came to The resolution that is the chip in the LCD board as I previously posted TV works perfect when I unhook the cable and plug it just before the TV boot up. I had a TV with a cracked screen same model Changed all the boards and cables just to see it had the same results.Comment
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Re: Samsung un70nu6900 power supply issue
Yes, Samsung has recently had a lot of defective panels, they die very often, as well as backlight problems.Comment
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Hello Everyone, this is my first post and I am excited to be a part of such a great community. I've been reading these forums for awhile and there really is some good friendly people here. No bashing and being rude like 90% of other forums Ive been to. Lets get to the good stuff.
I have two years of college in Electronics Engineering Technology. Ive been tinkering with electronics sine about 1990. I know enough just to be dangerous, so be gentle.
Make: Samsung
Model: UN60ES6500FXZA
Power Supply P/N: BN44-00525A
Symptoms: The TV was... -
I have a vintage 2008 Samsung 50” Plasma TV, Model code PN50A550S1FXZA with a power supply part number BN44-00222A. I repaired the power supply board several years ago finding a couple of cold solder joints on the back side of the board and it's worked great up until now. Recently a fried sound occurred with the smell of burnt electronics and the TV shut down. Trying to turn it back on yielded the typical relay clicking with no TV boot up. Upon investigation, removing feeds to the other boards within the TV it was found that disconnecting the logic board from the power supply allowed the... -
Hi all,
TL;DR - this laptop is driving me nuts with the oddball power-related behaviors. Appreciate any insight you can provide!
I'm experiencing a power issue on an Asus Probook P5440UF-XB74. Although I've worked with electronics and computers for decades, this is my first attempt at getting into motherboard-level component troubleshooting. Any help the community can provide is greatly appreciated!
A few weeks ago I was using the laptop (on battery power) for a Zoom meeting. The battery was running very low (long meeting) but I wasn't worried about... -
Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
I have been working on this concept for quite some time now with limited success but recently I found a switching power supply that is setup for the voltage that this soldering station needs to operate at however it also needs part of the secondary circuit from the original switching power because you need several voltage rails
I once tried to get a ZD-915 desoldering station to work on a 18 volt battery power supply but unfortunately things did not go well but I did find a work around but I might try this idea again but going at a little differently more about this another time...
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