Chosen Solution
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) http://imgur.com/8eKNBun http://imgur.com/22wBfON http://imgur.com/akLL4XV 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.
@sceprent you should test the connector on the board first before making all the capacitors spark. Testing capacitors by shortening it is really not a reliable test at all. Check the outputs on CNM803 and CNL802 against the values printed on the board itself. Let us know what those values are.
