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 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

[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

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.

[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?

[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

[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

[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

[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

[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

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

[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.

[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

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.

[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

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

[dskall]

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

What voltage are you getting on your ps-on while rebooting?

[Leplus]

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

What voltage are you getting on your ps-on while rebooting?

Mmmmm, you mean at the entrance? AC volts? Or any other point?

At the entrance I'm getting 234acV steady all the time. I can measure whatever you need haha, or connectors or the inverter (but I don't know where to measure exactly there so I didn't try there), I just run out of ideas.

I found another thread about this similar problem but they don't say the solution, just check the LVDS cable or the inverter, but without them disconnected the tv is still rebooting, so I didn't check them and I focused on the ps and the main board.

I also asked in a couple of youtube videos with the same issue but I don't expect them to reply, I'll wait anyway.

[dskall]

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

Need these

voltages from connector that goes from power supply board to main board. Will need pin#- PIN DESCRIPTION -Pin voltage in standby-Pin voltage when pushing power button and picture of connector on power supply board.
Format:
Pin# - Pin Description - Pin Voltage standby - Pin voltage power on
1 - XXXXXXX - XXv - XXXv
2 - XXXXXXX - XXXv - XXXv
3 - XXXXXXX - XXXv - XXXv
4 - etc.

[Leplus]

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

Need these

voltages from connector that goes from power supply board to main board. Will need pin#- PIN DESCRIPTION -Pin voltage in standby-Pin voltage when pushing power button and picture of connector on power supply board.
Format:
Pin# - Pin Description - Pin Voltage standby - Pin voltage power on
1 - XXXXXXX - XXv - XXXv
2 - XXXXXXX - XXXv - XXXv
3 - XXXXXXX - XXXv - XXXv
4 - etc.

Ok, I already measured that connector and the other one of 5 pins coming back from main board to ps and all were ok, maybe I'm missing something, so, give some minutes and I'll check again to post it.

[Leplus]

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

There you go, connector from ps to main board.

01 - ON/OFF - 0V - 3.41V
02 - N/C (No conexion) - 0V - 0V
03 - Standby - 5,21V - 5.22V
04 - S-GND - 0V - 0V
05 - GND - 0V - 0V
06 - GND - 0V - 0V
07 - 12V - 0V - 11.97V
08 - 12V - 0V - 11.99V
09 - GND - 0V - 0V
10 - GND - 0V - 0V
11 - GND - 0V - 0V
12 - GND - 0V - 0V
13 - 5.3V - 0.65V - 5.36V
14 - 5.3V - 0.65V - 5.36V
15 - 5.3V - 0.65V - 5.36V
16 - 5.3V - 0.65V - 5.36V
17 - GND - 0V - 0V
18 - GND - 0V - 0V
19 - 13V - 0.71V - 12.10V
20 - GND - 0V - 0V
21 - 13V - 0.71V - 12.10V
22 - 13V - 0.71V - 12.10V
23 - N/C - 0V - 0V
24 - N/C - 0V - 0V