1 Samsung Curve TV wont power on
r/fixit
Samsung Curve tv wont turn on.
u/Sceprent
Fun one hopefully, after hours of browsing I can't find a good guide on testing the power supply or main board. My Curve is acrually a UN55JU6700 2015 Curvy boy decided to just turn off the other day.
Symptoms: wont turn on, idle light flashes on/off, Capacitors have no physical signs of damage, and the relay keeps clicking a few times every few seconds.
I know one way to test old microwave capacitors was to short em and see if they spark, also to avoid getting killed. I did this for fun and pretty much all of them sparked. The little 250v 105° one's don't spark, but I don't think that means anything. Says COLD also CM862/CM863 near those.
Hoping I can figure it out, the boards aren't pricey and I recently fixed my laptop by swapping the CPU. (I know not common, but it was the fix!)
Pics
http://imgur.com/fXalhbY http://imgur.com/0yrhEXt http://imgur.com/4K4tQ40 http://imgur.com/KJ8yqZw
Update (06/03/2018)
Values
Update (06/03/2018)
I realized it needs to be DC COLD end and AC Hot end. So I'm only getting 2.8 on the first idle power pin. Probably a good sign in diagnosing the problem. Also unplugging the main board from power no backlight, not sure if that applies to my tv as it has the I think it's called "Tcon" board. Some fluctuations going on too.
Update : I decided to start trying out boards, they're only $20 for my TV. I ordered the Power supply board due to the fluctuation which indicates capacitors or power management sytstem whichever that's called, due to the fact I see no apparent damage I'm just swapping the board out. Ordered a returnable main board just in case as plan B.
좋은 질문 입니까?
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댓글 2개
Yes it is acalled a T-con board. Your backlight should comne on with the main board disconnected. Right now it appears as if you are having a power board issue. Let me see if I can find the schematic for it so we can have you check things out.,
oldturkey03 의
Thanks buddy. Also I should have mentioned all these readings are jumping from 0 to the reading in the span of 1 second fluctuating like crazy when read from the actual 8 board poles rather than the ribbon. so like 2.8v 0v 1.4 2.8v. I double checked my Volt meter in the wall outlet and it gets the steady 110.
I did figure out how to read all 12 though, so when I go straight in 1-12 I get solid readings, the on/off and turn on positions 4 and 8 give me 2.8-3.3 as I understand some TVs will give this rather than 5v. Also I've tried the short to ground from on/off to ground to check backlights, it didn't work. I saw a tutorial that mentioned if your on/off has voltage then it uses the short to ground method, if it gives no voltage then you short on/off to the 12.8v.
Dustin 의