Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm
Update.
Well, this is the final stage for this board. In the picture I'm showing the pc fan that I put on top of the shield, so now the tv stays on and I can watch ext 1/2 and hdmi. DTV is not possible.
I think I'll get a new board soon but for now, this is ok....
Leplus
Member
Last Activity: 07-29-2017, 07:50 PM
Joined: 04-18-2017
Location: Galicia
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Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm
Yep, I'm also thinking about this solution, but obviously I prefer to get a board for that money.
Now I have a fan pointing to the shield (I can keep it) but in fact after several trials I think the critical point is the chip in the red circle: IC3101 IC-DECODER;STI5105,PBGA,324P,23x23mm,PLA
So, that is the final stage I think, with the usb fan like in the second pic:
- DTV mode no signal from the antenna
- Ext 1 (RGB), perfect image...Leave a comment:
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Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm
How could I do that? Because as soon as I disconnect the mainboard, the led goes off and tv doesn't power up.
Update.
Now with the usb fan pointing to the shield area (removed) tv stays on again, i wasn't able last night. But as soon as I take the fan away the cycle begins, it doesn't admit any temperature.
Also, in dtv mode, when pressing one or two chips on the shield area, I can get the no signal image properly, because sometimes it...Leave a comment:
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Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm
Is there any way of turn the tv on with the mainboard disconnected? Like shorting some pins or anything, and check if the tv stays on only with the psuLeave a comment:
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Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm
Well, I bought a usb fan but I still can't keep the tv on all the time, or it's not relevant the temperature, i don't know.
Yep, there are a couple on ebay around £35 + shipping but I want to be 100% sure that it's the main board and don't waste money....Leave a comment:
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Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm
Those pads are on top of both chips (red circles in picture 1) touching all the time, they always were there, and the shield can't go any deeper, it's in its position already so I guess the pads are touching the chips....Leave a comment:
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Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm
New update:
I tried cooling down mainly the main board with a manual fan xD (FML) and I can get the tv on.
Now, without stopping, DTV mode image is perfect, no lines, BUT I can't find any channel, it tells me to check the antenna conexion. In RGB mode, the color pumping remains, and in AV mode image is perfect as always.
Under the shield T5 labelled there are two chips with a sticky liguid and a square thing on top to refrigerate. Could it be a problem...Last edited by Leplus; 04-22-2017, 09:41 AM.Leave a comment:
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Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm
I just did an eeprom reset now but no result.Leave a comment:
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Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm
Yes, it goes to 0V for one-two seconds because tv powers off, and once it starts voltage goes to 3.41V right away....Leave a comment:
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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 -...Leave a comment:
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Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm
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....Leave a comment:
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Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm
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...Leave a comment:
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Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm
Well, after being with the tv on, it continuesly rebootsLeave a comment:
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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.Leave a comment:
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Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm
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....Last edited by Leplus; 04-20-2017, 05:56 PM.Leave a comment:
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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.Last edited by Leplus; 04-20-2017, 04:31 PM.Leave a comment:
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Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm
That one has been already changed a month ago following this [URL="http://tvrepair.ru/neispravnosti/remont-samsung-le32m87bd.html"]post[/URL] 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 xDRe: Samsung TV LE32M87BD image...Leave a comment:
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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 technicianLeave a comment:
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Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm
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...Leave a comment:
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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?...Leave a comment:
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