Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm up

[Leplus]

Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm

Well, after being with the tv on, it continuesly reboots

[Leplus]

Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm

Well, now being cool, tv after 30 seconds reboots, and even being warmed up still reboots, so I don't get any difference heating or cooling with the hairdryer. I'll leave it rebooting to see if it begins to work.

[Leplus]

Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm

Heating must be doing something if it is making it worse. You will probably need to freeze areas to see if it improves.

I'll try it tomorrow with the hairdryer in cool mode but I don't understand it. Yesterday I'd been watching the champions league match after waiting some minutes to have the tv working perfectly, today I can't get it that way even waiting for hours I would say, holy crap.

[dskall]

Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm

Heating must be doing something if it is making it worse. You will probably need to freeze areas to see if it improves.

[Leplus]

Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm

And also I have been hairdrying the boards but nothing, now I don't get the tv out of rebooting.

[Leplus]

Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm

Since you have changed a lot of caps, try changing the cap on the sub board, c6108 or something like that

That one has been already changed a month ago following this post in russian because I had those exact symptoms.

But now a month later this happened but I didn't find anything similar, and I tried disconnecting the sub board and the tv still reboots, as well as disconnecting the inverter or the T-con.

So I don't know what else to touch xD

[ducky29]

Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm

Since you have changed a lot of caps, try changing the cap on the sub board, c6108 or something like that

[Leplus]

Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm

Quick update.

I replaced the last 1000uF 10V cap but the problem remains. I don't know what more to do than take it to a technician

[Leplus]

Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm

it can update though the antenna on DTV signals

I didn't know, well then I'll google that up and try to check or update the firmware, or reset it through the service menu maybe?

But I don't know because after several rebooting the tv works. Now tv takes too long to work though.

I'll arrange the shit I did first desoldering xD

[finntricky]

Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm

But this tv does not have wifi or anything. It was only connected to antenna and power, or am I wrong?

it can update though the antenna on DTV signals

[finntricky]

Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm

Little problem.

While removing the last cap one of the pads got away.

Where should I scrape to solder the new cap? Is it ok to scrape right where I have the screwdriver? I don't understand how it should work sorry, Im new at this.

yes that should be ok

[Leplus]

Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm

the tv turning on, on its own, while in standby, could mean it was taking an update, and being unplugged has corrupted the firmware update ?

But this tv does not have wifi or anything. It was only connected to antenna and power, or am I wrong?

[Leplus]

Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm

Little problem.

While removing the last cap one of the pads got away.

Where should I scrape to solder the new cap? Is it ok to scrape right where I have the screwdriver? I don't understand how it should work sorry, Im new at this.

[finntricky]

Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm

Nah, I changed both caps but the problem remains, same behaviour like in the videos.

It sucks because at first tv works always, so I have to wait for a couple of minutes to know whether the changes worked or not haha, but then it fails.

Another thing, my friend told me that the night that the tv began to fail, tv turned on by itself two times in the middle of the night until he plugged it out. Just if this info is valuable.

So, any ideas of what more to change? XD

Edit: From the dtv source I don't get any image, just the menus, but from scart source I get image but with the colors pumping until tv turns off.

the tv turning on, on its own, while in standby, could mean it was taking an update, and being unplugged has corrupted the firmware update ?

[Leplus]

Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm

Well looking at them isn't only test. Would need to check esr on them. Short of actually testing them is replacing them.

Well, I have another 1000uF 16V available, Which one would you try? XDDD The yellow or another on the board? xD

I don't have esr meter in circuit and my meter if I desolder them is up to 200u

[dskall]

Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm

Well looking at them isn't only test. Would need to check esr on them. Short of actually testing them is replacing them.

[Leplus]

Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm

Is that cap in yellow bulged? Is it one you replaced?

No, it looks ok, seems like its bulged like the other in red, but both look ok, there are no caps apparently bad in the tv. And nope, I only changed the one in red and the brown cylindric next to it.

[dskall]

Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm

You mean, in the picture I'm attaching now, to change the brown and the one in the red square right?

The one in yellow should leave it there right? Just to confirm.

And just curiosity, how do you know what to change or not? is there a repair service manual or something?

And another thing, is it risky for the tv to change the brown cap for another with less capacity or it would only affect to the funcionality? I'll try to look for the diagrams and check its value but i'm down for the change anyway hehe

Is that cap in yellow bulged? Is it one you replaced?

[Leplus]

Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm

Should be around 390vdc

Yep, 388Vdc

[dskall]

Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm

Should be around 390vdc