Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm
Are you losing ON/OFF voltage as it cycles?
Are you losing ON/OFF voltage as it cycles?
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I assume no responsibility for any stupid suggestions I might post. -
Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm
I just did an eeprom reset now but no result.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 there?
I don't know, Ill try to get a fan from a pc and narrow the problem down a little bit more later.
Edit: I've attached some pictures, one half of a chip is dryAttached FilesLast edited by Leplus; 04-22-2017, 09:41 AM.Comment
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Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm
That board is a mess. Were the heat pads gone for those chips?I assume no responsibility for any stupid suggestions I might post.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.Comment
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Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm
If this was my tv i would probably try to source a replacement mainboard as faults are hard to locate on any mainboard.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.Comment
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Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm
32" hard to justify spending to much on it.I assume no responsibility for any stupid suggestions I might post.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 psuComment
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Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm
You can force psu and backlights onI assume no responsibility for any stupid suggestions I might post.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 freezes before the reboot. But in RGB the color pumping issue remains.
I will end up ordering the board anyway so we can voodoo this one looking for a solution XD. I'm opened to oven methods also if required xDDDComment
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Re: Samsung TV LE32M87BD image issue, turns off by itself, works perfectly after warm
I think You need to re-ball the BGA chipsComment
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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
- Ext 2 (AV), image pumping the colors
- HDMI 1, a bit cut at the bottom
- HDMI 2, perfect
Now I'm looking for buying a cheap pc fan and put it inside, more quiet, because the chinese one that I have now is like a drone in a room.
Is it possible to take the power from any point of the tv without stressing or anything (12DCV)?Attached FilesComment
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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.Attached FilesComment
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