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Versão atual de: Marcel Molendijk ,

Texto:

Thanks for sharing this, I am pretty sure what the problem is. The heatpipes are (well, actually Were) filled with some kind of liquid. I took the whole iMac apart and at first cleaned all fans and heatinks. Also, I tested every one of them if they were working before assembling the system again. They all did. But, when I put everything together and booted, the temperature rose gradually until it was around 104 degrees Celsius. So, took everything apart again, and cleaned the heatsink processor and memory from the old thermal goo.. Applied silver paste and assembled. During aasembly, I saw some strange discolorations on my motherboard. Looked like some dried up liquid. After looking further, I also found discoloration on one of the heatpipes, but did not draw the right conclusion yet. Until I found this movie on youtube. https://www.youtube.com/watch?v=qXso8KFG78M Then I was sure. The heatpipes have lost some kind of liquid and the discolorations were dried up liquid. Also, I did find the hole in the heatpipe, exactly with the same discoloration seen in the video. So The heatpipes are the problem. Also the guy in the movie tells that the heatsink was not hot, so I tested this on my system, and I have exactly the same issue. The heatsink of the GPU is not hot. So the heat from the GPU is not transported through the heatpipes to the heatsink and therefore it is not properly cooled.
 
Now, I am looking for a replacement heatsink, or I will actually try to repair it. I will try to find out what kind of liquid was in there, and how to get some back in there. And then maybe solder it. I will report back about that. Hope this helps anyone.
Now, I am looking for a replacement heatsink, or I will actually try to repair it. I will try to find out what kind of liquid was in there, and how to get some back in there. And then maybe solder it. I will report back about that. Hope this helps anyone.

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Editado por: Marcel Molendijk ,

Texto:

Thanks for sharing this, I am pretty sure what the problem is. The heatpipes are (well, actually Were) filled with some kind of liquid. I took the whole iMac apart and at first cleaned all fans and heatinks. Also, I tested every one of them if they were working before assembling the system again. They all did. But, when I put everything together and booted, the temperature rose gradually until it was around 104 degrees Celsius. So, took everything apart again, and cleaned the heatsink processor and memory from the old thermal goo.. Applied silver paste and assembled. During aasembly, I saw some strange discolorations on my motherboard. Looked like some dried up liquid. After looking further, I also found discoloration on one of the heatpipes, but did not draw the right conclusion yet. Until I found this movie on youtube. https://www.youtube.com/watch?v=qXso8KFG78M Then I was sure. The heatpipes have lost some kind of liquid and the discolorations were dried up liquid. Also, I did find the hole in the heatpipe, exactly with the same discoloration seen in the video. So The heatpipes are the problem. Also the guy in the movie tells that the heatsink was not hot, so I tested this on my system, and I have exactly the same issue. The heatsink of the GPU is not hot. So the heat from the GPU is not transported through the heatpipes to the heatsink and therefore it is not properly cooled.
Thanks for sharing this, I am pretty sure what the problem is. The heatpipes are (well, actually Were) filled with some kind of liquid. I took the whole iMac apart and at first cleaned all fans and heatinks. Also, I tested every one of them if they were working before assembling the system again. They all did. But, when I put everything together and booted, the temperature rose gradually until it was around 104 degrees Celsius. So, took everything apart again, and cleaned the heatsink processor and memory from the old thermal goo.. Applied silver paste and assembled. During aasembly, I saw some strange discolorations on my motherboard. Looked like some dried up liquid. After looking further, I also found discoloration on one of the heatpipes, but did not draw the right conclusion yet. Until I found this movie on youtube. https://www.youtube.com/watch?v=qXso8KFG78M Then I was sure. The heatpipes have lost some kind of liquid and the discolorations were dried up liquid. Also, I did find the hole in the heatpipe, exactly with the same discoloration seen in the video. So The heatpipes are the problem. Also the guy in the movie tells that the heatsink was not hot, so I tested this on my system, and I have exactly the same issue. The heatsink of the GPU is not hot. So the heat from the GPU is not transported through the heatpipes to the heatsink and therefore it is not properly cooled.
 
Now, I am looking for a replacement heatsink, or I will actually try to repair it. I will report back about that. Hope this helps anyone.

Status:

open

Postagem original de: Marcel Molendijk ,

Texto:

Thanks for sharing this, I am pretty sure what the problem is. The heatpipes are filled with some kind of liquid. I took the whole iMac apart and at first cleaned all fans and heatinks. Also, I tested every one of them if they were working before assembling the system again. They all did. But, when I put everything together and booted, the temperature rose gradually until it was around 104 degrees Celsius. So, took everything apart again, and cleaned the heatsink processor and memory from the old thermal goo.. Applied silver paste and assembled. During aasembly, I saw some strange discolorations on my motherboard. Looked like some dried up liquid. After looking further, I also found discoloration on one of the heatpipes, but did not draw the right conclusion yet. Until I found this movie on youtube. https://www.youtube.com/watch?v=qXso8KFG78M Then I was sure. The heatpipes have lost some kind of liquid and the discolorations were dried up liquid. Also, I did find the hole in the heatpipe, exactly with the same discoloration seen in the video. So The heatpipes are the problem. Also the guy in the movie tells that the heatsink was not hot, so I tested this on my system, and I have exactly the same issue. The heatsink of the GPU is not hot. So the heat from the GPU is not transported through the heatpipes to the heatsink and therefore it is not properly cooled.

Now, I am looking for a replacement heatsink, or I will actually try to repair it. I will report back about that. Hope this helps anyone.

Status:

open