Re: Insignia NS-37D20SNA14 Backlight going out. Flickering! Help!
Ok caps replaced still no screen. Any other directions? ill post my pictures of the work i did maybe i didnt do it right...Plz help!
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Re: Insignia NS-37D20SNA14 Backlight going out. Flickering! Help!
Caps are here. Replacing them now wish me luck!Leave a comment:
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Re: Insignia NS-37D20SNA14 Backlight going out. Flickering! Help!
The caps are 47uf 100v High Temp Radial. Having 0 luck locally. Looks like I will be getting them shipped.Leave a comment:
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Re: Insignia NS-37D20SNA14 Backlight going out. Flickering! Help!
I this case, there is no short or anything like that in the PS / LED driver, so fix that what you know is broken (the caps). I'd be changing those 3 caps C523, 524 and 525 and see if that problem went away. Caps are cheap.Leave a comment:
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Re: Insignia NS-37D20SNA14 Backlight going out. Flickering! Help!
Whats next?Leave a comment:
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Re: Insignia NS-37D20SNA14 Backlight going out. Flickering! Help!
What should i do next?Leave a comment:
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Re: Insignia NS-37D20SNA14 Backlight going out. Flickering! Help!
their was never a plug connected to x601. here is the measure at vDC500 in the attachment for C625Attached Filesif you find these attachements useful please consider making a small donation to the site
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Re: Insignia NS-37D20SNA14 Backlight going out. Flickering! Help!
Should that be X601? marked at gn and 55v? Just put meter on vdc200
blackprobe on gnd and red on a 55v pin
EDIT no!! got it now - forget that.
With meter on vDC600 test cross the legs on that 250v cap C625 - care maybe high voltageLast edited by selldoor; 01-12-2015, 03:25 PM.Leave a comment:
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Re: Insignia NS-37D20SNA14 Backlight going out. Flickering! Help!
Ok, i got a reading after pluging everything up and powering on. Reading the x602 Led power out connecter. 0 on all settings for DC, BUT i was pulsing at the rate the screen use to flash! What does this mean? Where do I go from here?Leave a comment:
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Re: Insignia NS-37D20SNA14 Backlight going out. Flickering! Help!
Also c525 does look slightly bulged. Not trained in any of this but it does look swollen.Leave a comment:
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Re: Insignia NS-37D20SNA14 Backlight going out. Flickering! Help!
OK attached the top right power supply. So when making the measurements what setting does the voltmeter be on? Also with all power cords connected and tv on, how exactly do i measure x602? with the x602 connecting cable out?Attached Filesif you find these attachements useful please consider making a small donation to the site
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Re: Insignia NS-37D20SNA14 Backlight going out. Flickering! Help!
just the front, that we can see the pin out. If your at it, you can make some measurements on that connector with the TV on. GND is chassis ground. Put all the cables back on the boards, turn on the TV and make DC voltage measurements on that connector with the cable attached.Last edited by CapLeaker; 01-07-2015, 06:02 PM.Leave a comment:
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Re: Insignia NS-37D20SNA14 Backlight going out. Flickering! Help!
Will do. top right of power supply with cable out of the way. Front and back?Leave a comment:
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Re: Insignia NS-37D20SNA14 Backlight going out. Flickering! Help!
That is a LED TV. The LED driver is combined with the power supply. Measure the voltage on X602 (LED output).
selldoor has a good eye. I looked at the same cap on two pictures and it sticks out a bit compared to the others. Maybe that is indeed a bad cap.
One more pic please of the top right of the power supply, without that cable plugged in, so we can see the pinouts too.Leave a comment:
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Re: Insignia NS-37D20SNA14 Backlight going out. Flickering! Help!
Thanks ill take a look when the kids go down. The whole tv is dim, like black... I can barley see any video input and I have to turn off the light in the room to even see it. Ill get back asap. Thanks again.
ps the brand of the tv is insignia. If your talking about the boards, im unsure.Leave a comment:
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Re: Insignia NS-37D20SNA14 Backlight going out. Flickering! Help!
OK have just had a quick look but I cant work at it tonight
C525 looks a little bulged to me the way the light reflects - is it? have a look
flat across the end. What brand is it?
Also top left of the power supply there are 4 diodes looking at the back the
solder on the bottom one doesnt look great (maybe just the picture so check it out with a magnifying glass or just resolder them all.
Hopefully someone else on your side of the pond will join in and maybe spot a few other things and suggest a few tests.
I think this is an LED backlight - is it dim all over or are different sections dim?Leave a comment:
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Re: Insignia NS-37D20SNA14 Backlight going out. Flickering! Help!
And here are some others.Attached Filesif you find these attachements useful please consider making a small donation to the site
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Re: Insignia NS-37D20SNA14 Backlight going out. Flickering! Help!
Here are the boards.Attached Filesif you find these attachements useful please consider making a small donation to the site
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Re: Insignia NS-37D20SNA14 Backlight going out. Flickering! Help!
Sorry. Appreciate the help. So i need to take the power supply board off the tv and get pics of the back as well? I will try to load them up asap. Thanks again, I have until the 15th to figure it out or my family will be without a tv.Leave a comment:
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Re: Insignia NS-37D20SNA14 Backlight going out. Flickering! Help!
Put simply you are not trying hard enough - Life is a lot simpler for us to just move on to another thread
Try adding pics 2,3 &4 one at a time - we also need to see that back of the power supply and the back and front of the main board (no pic at all?)Leave a comment:
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Hello, I have a strange issue with a laptop that I'm working on fixing up for a friend of mine, and it appears as though the LCD backlight control is not reliable. The LCD backlight flickers sometimes with inconsistent brightness. The controls are no better.. when I go 1/3 of the way in the brightness controls it will get bright but flicker quite obviously, and when I go all the way to what SHOULD be full brightness, it becomes darker. The flickering is less severe at lower brightness, but more severe at higher. the backlight will literally flicker on and off when I set it to the lowest brightness...
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Hello All,
My Samsung LE52B620 started to have backlight flickering about a year ago, it would only last for about 10 mins and then the backlight would stay on.
about a month ago the backlight flickering is constant and does not stop.
I think it's a problem with the power supply board (BN44-00267b) or maybe the backlight is dying?
I checked and all the caps look to be fine.
I do not believe it is a problem with the mainboard, since I unplugged it from the power supply and the backlight came out but still flickers.
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this tv is throwing me for a loop. do samsung tvs no longer have the backlight self test feature built into the power supply?
i tested the backlight with my LED tester and it lights up both strips. one of them reads 100v and the other reads 63.7v.
unplugged mainboard from power supply but left backlight plugged in, and then plugged psu wall power in. expected to see backlights light up but see nothing.
according to how ive diagnosed in the past, this would almost always be a bad power supply. replacement power supply was cheap like 20$ from ebay. but still i get not even... -
Hi. Could anyone on the forum help me find the cause of the problem?...
The board is LA-B111P Rev:1A comes from Lenovo Y50-70.
I have a identified the damaged R205 resistor, and connect a jump wire over it So it restores the backlight but causing strange problems
1. With Battery ONLY plugged in laptop works fine
2 .With Charger ONLY plugged in laptop works fine as well
3. Connecting both battery and charger at the same time shows a strange flickering screen. The flickering is not constant, it is completely random (and I think it depends on the load -
Hi to all,
I have this laptop that suddendly won't boot.
When I plug the power adapter, the charging LED turns on.
When I press the power button, I can hear the fan spinning, and the screen start flashings, with the frontal green LED flashing too.
No other vital signs.
I reseated the RAM, changed the RAM, changed CMOS battery, disassembled, cleaned, and reassembled all the boards, changed thermal paste and reflowed, tried the NOVO button (the tiny reset button on the right side) to enter BIOS, tried F2 or Fn + F2, changed power adapter, but with no luck.
I think...
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