The same thing happened to me today as you've all reported recently. I switched on my LNS5296 and only received the steady blue light and nothing on the screen itself. After reading your posts I opened the TV, found the power inverter board, and I too had "puffed capacitors". Four out of five of the "Samwha" branded 1000µf, 10v, 105°C aluminum electrolytic radials popped.
The model code is "WB" but Samwha discontinued that model in 1999, long before our TVs were built. I suspect whoever assembled the board had too many left over. The new model is "MK", although I replaced mine with NTE branded 1000µf, 16v, 105°C ones from 'Fry's', a consumer electronics chain here.
It works. I've uploaded a set of pictures in a form of 'how-to' since this seems to be a common problem. Careful of static and electrocution, do these steps with it unplugged at minimum. The attached pictures are numbered to match the steps below:
- LCD facing screen down with rear casing removed. First remove the pedestal/base if you're not wall-mounted and then remove the back plastic cover. Once configured as in the picture remove the metal cover that the arrow points to the center of.
- Under that metal cover you'll find this board - follow the arrows and compare it to your own. The domed capacitors with the insulation visible are "bad". If yours are all fine, you may have a different problem.
- A) Here you see a closeup of the area and my four bad ones. B) Remove your bad ones as I have by heating the solder points on the back and gently pulling them off the board. C) Stick the new ones through making sure that the direction is the same as the originals. They'll either have a key picture matching the board, or they'll have a stripe, or both. Clip them to the same length as the originals and solder them on. D) Complete, make sure you can't wiggle them.
- Being extremely careful... plug the board back in, plug in the TV and make sure that the blue light starts blinking and the fan turns on. Your TV likely did neither before, and should now. If you pop a capacitor you likely put it in backwards, or it might be faulty. Replace.
- Put the TV back together and test it formally.
Originally Posted by sammycloud
OK, so I pulled off the back of the tv and discovered what appear to be three blown capacitors (tops are bulged out, clearly look different from their siblings). (clip)
For future reference part is BN44-00150A and capacitors affected all seem to be 1000uF 10V - I got 35V based on a different post out there but those, while bigger, should be fine.
Originally Posted by jkoeller
For anyone else that wakes up to the horrifying realization that their 5296 won't power on...(clip)
The problem ended up being in the power supply, and since the set was no longer under warranty, they took the extra effort to repair the power supply rather than replacing it. They found 5 blown 1000uf capacitors ("puffed caps" for those in the biz
)and replaced them - which fixed the problem!
Originally Posted by carloss
I had the same problem last week, no power and a big scare. (clip)
a BIG thanks to jkoeller, since I checked my power supply and indeed it had puffed caps. I ordered a replacement PS from printsavings.com, got it in 2 days and it solved the problem.
Originally Posted by MightyHalo
Well...Im an owner of two years of this set (LN-S5296D). I found out my power inverter failed. Technician swapped both the main board and power supply and no luck. My problem is the same as many of you. For a awhile I had to turn on the TV twice for a picture. Now..I just have the blue light on, and no picture.
Originally Posted by jstrazz
HELP! My Samsung LN-S5296D suddenly stopped working. It worked fine last night. I turned if off, went to bed and this morning it won't turn on. I turn it on and I get nothing. That little blue light is still on at the bottom of the screen.