Re: Seiki SE32HY27 - No backlight on 2 system boards

OK, I tested the voltage across the cap, and it does jump to around 100v with or without the LEDs connected, and then drops right back down to the 48v range. So, looks like I've got some bad LEDs.
I am testing individual lights now after scraping paint off the circuits, and it appears the first strip has at least 2 bad LEDs. I'll continue checking the rest to see what I come up with.
Thanks for the help; it appears my search-fu just wasn't strong enough.

Re: Seiki SE32HY27 - No backlight on 2 system boards

Thanks for that info. I was assuming that if power was supposed to go through the strips, then I'd have some continuity.
I'll try my 3v test and see if I get anything from scratching the paint off the painted wires. I did search the forums, and saw some people had luck with laptop power supplies, but knowing that 3v x 8 LEDs = 24v (probably slightly higher), I'm looking right now to see if I have a 24 or even 48v power supply (48v should let me test 2 strips at once, I'd think).

Re: "Smart" TVs

Since my primary job is PC repair, I've been perfectly happy to simply take my formerly smart TV and hook up a computer cobbled together with leftover parts.
Hook up a UPS to it, install whatever OS (Linux works great on an older system with limited RAM), and run it.
Tweak everything to your liking, and go for it.
As an added bonus, I just acquired a rather nice laptop that had a shorted keyboard and bad hard drive. User decided to replace the system, I pulled his data for him, and then swapped for a known good drive and a wireless keyboard/mouse...

Re: "Smart" TVs

Mine stopped updating a long time ago. I built a Linux box to server as a multimedia system, and for those items that don't work in Linux, I hook up my laptop.
Another option is just a smart DVD/Bluray player, Roku box, or similar.

Re: Seiki SE32HY27 - No backlight on 2 system boards

And just for the record, these LED strips are not what I'm used to seeing; the back of the strip appears to ground to the TV itself, and if those small solder joints are test points, they're not working with a 3v power supply.
There are no solder joints on the back of the strips; just one solid piece of copper, with the occasional hole for a screw, or what may be some kind of "test point", which would actually just ground the strip to the back of the TV....

Hello all,
I'm working on a Seiki SE32HY27 LED TV. It was most likely the victim of a power surge, at which point I had the user unplug it, and it went from no power to power with no back lights.
I replaced the board, since this unit has the main and power board integrated into one unit, and the first replacement gave me no power, just a red indicator light. So, I exchanged that for another, which is back to powering on, but still no back lights.
I'm getting a reading of 48 volts from the LED power when the TV is on, and 41 volts when it's off. This unit has 3 strips of 8 LEDs,...

Re: samsung ln40b530p7fxza light up problem



That pretty much confirms my thinking. The one thing that I hate with this one is that we had a bad electrical storm a few days before it quit.
I'm hoping this doesn't mean I've got more damage here than the caps. I'm also from the "Old Days", where most of the bad caps I saw were on computer motherboards, and those never seemed to blow out the bottoms; they usually bulged and began to leak out the tops.
Pics attached now. The caps I'm looking at are the yellow ones; the dust on the base looks like it's...

Re: samsung ln40b530p7fxza light up problem

As much as I hate to dig up an old thread, I'm new here, so I believe I'm limited to posting on old threads for now...
I'm looking at this same TV; won't power on, red standby light blinks once when you hit the power button. I unplugged the cable from the power board to the main board to test voltages, and the back lights came on. The voltages at the power board seem to be correct, but I do believe I've got 2 leaking caps, in this case leaking out the bottom and not bulged at the top.
I did plug the main board back into the...