Samsung HP-S4253 - 5 seconds to black

[atoledo]

After searching for over an hour on this forum, I discovered a member with the exact same problem as me.

https://www.badcaps.net/forum/showth...light=hp-s4253

I also learned that fixing the problem is far beyond my knowledge, so I almost decided not to post. However, here it is...

A while back I had a no-picture/clicking problem with a Samsung HPT4254 that I pulled out the power board, sent it to a guy in Washington, and one week and $65 dollars later I had a working set again.

Now my friend's Samsung HP-S4253 goes on for about 5 seconds, then fades to black. I've read the other thread with the same problem, but the guy never fully discovered what the problem was or how to fix it. I was hoping the problem was as widespread as the one on my Samsung HPT4254 whereby everyone knew the trouble lay in the power board.

Interestingly enough, if I turn the set on and immediately start cycling through all the inputs, the screen does not fade to black until I stop.

If anyone has any idea on this, please share. I would be very grateful.

Thank You

[tom66]

Re: Samsung HP-S4253 - 5 seconds to black

If you go to a "no signal" screen, does it ever fade out? Or only on scenes with actual pictures on them?

[capkid]

Re: Samsung HP-S4253 - 5 seconds to black

There are a couple repair kits for this TV that address the symptoms you describe. You'll have to determine through testing which kit, if any, is useful:

http://www.amazon.com/Repair-Samsung.../dp/B00897A3KS

http://www.ebay.com/itm/SAMSUNG-Plas...item20d013a5a0

[adriancel]

Re: Samsung HP-S4253 - 5 seconds to black

Please post a picture with the power supply board.

[atoledo]

Re: Samsung HP-S4253 - 5 seconds to black

If you go to a "no signal" screen, does it ever fade out? Or only on scenes with actual pictures on them?

It fades out no matter what input is selected, whether there is a signal or not.

[tom66]

Re: Samsung HP-S4253 - 5 seconds to black

By fade out, do you mean a sudden loss of picture, or does it visibly reduce in brightness as it goes?

[atoledo]

Re: Samsung HP-S4253 - 5 seconds to black

By fade out, do you mean a sudden loss of picture, or does it visibly reduce in brightness as it goes?

First of all, sorry for such a late response. I've been super busy lately.

By fade out, I mean that the image does NOT just switch off, but rather it takes about half a second from full image to completely black. There is still audio, but not image at all.

In order to narrow it down to just the tv set, I disconnected all other components (cable box, game box, dvd, antenna, etc.) and switched the set on. I quickly brought up the setup menu and it showed for about one second before it quickly faded to black as well.

Attached are images of the boards inside. I don't know which one is the power supply board.