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10-26-2017

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Heating issue : ThinkPad X240

2017-10-26, 3:54 AM

My X240 is heating up a lot.   . Can someone help me fix this issue? Thanks.

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07-24-2013

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Re: Heating issue : ThinkPad X240

2017-10-26, 7:14 AM

Welcome to the forum!

 

Those temps don't seem too high for me, (I'm assuming they're idle temps).

 

What you can do is clean the fan with compressed air. For this you need to remove the base cover, make sure to block the fan with your finger or a plastic tool to prevent it from spinning before applying.

 

Even better would be to replace the thermal paste. For this task you need to remove the heastink, thoroughly clean the old paste with 100% alcohol (both from the heatsink and the CPU, and apply a very thin layer of thermal compound. You need to buy a good quality one like Thermal Grizzly Kryonaut or Artic Cooling MX-2.

 

To remove the base cover and the heatsink you'd need to follow the steps explained in the hardware maintenance manual HMM, which you can download from here: click me! Check chapter 9 - 1020 & 1080

 

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Re: Heating issue : ThinkPad X240

2017-10-27, 9:17 AM

Thanks. Yeah, they're Idle Temps. But when I use the laptop for a few mins, it heats up abruptly. I've cleaned the fan using compressed air as well as replaced the thermal paste using Arctic Silver 5.  I've also installed a new keyboard, just so you know.

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Re: Heating issue : ThinkPad X240

2017-10-27, 11:49 AM

Means the temps posted above are after the repasting?

 

In this case be careful about the amount of paste, the layer of paste over the CPU die must be very thin. Also check that the heatsink is making full flat contact with the CPU and that the screws are properly tightened.

 

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Re: Heating issue : ThinkPad X240

2017-10-27, 13:34 PM

Yes, those were the values after repasting, when no cpu or gpu intensive applications were active. It looks like I've not applied the thermal paste properly. What's the best way to apply it? Also should  the heatsink make full flat contact with CPU? Because there's a white strip bet'n the heatsink and CPU, which looks similar to a double sided foam tape. Thanks.[oldimg]jpg_640x640.jpg[/oldimg]

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  • Message 6 of 19

Re: Heating issue : ThinkPad X240

2017-10-27, 17:54 PM

New heatsinks normally include some low quality thermal compound, I would clean the compound from the heatsink (use 100% alcohol as described above) and remove any tape you may find.

 


wrote:

What's the best way to apply it?


You normally need a small drop of the size of a rice corn, then use a flat tool (for example an old credit/debit card) to distribute it evenly, the result should be something like this (it's an old CPU, but just as reference for the amount of paste)

 

 


wrote:

Also should  the heatsink make full flat contact with CPU? 


Yes, at the end you need CPU-Compound-Heatsink, nothing extra in between!

 

Before repasting, please remember to deactivate the internal battery from the BIOS and remove the external battery!!

 

Good luck and keep us posted!

 

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  • Message 7 of 19

Re: Heating issue : ThinkPad X240

2017-10-28, 6:38 AM

Hi,
I removed the double sided white foam tape which was there between the heatsink and cpu, cleaned both the heatsink and processors (cpu & gpu) using an Isopropyl Alcohol Swab (which contains about 70% Alcohol). But the temps still remain the same i.e 65-70 (earlier they went up to as high as 85 degrees centigrade).

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  • Message 8 of 19

Re: Heating issue : ThinkPad X240

2017-10-28, 10:48 AM

Ty installing TPFanControl: link and see the temps it reports.

 

Is the heatsink new? Do you see if the heatpipes are bent or damaged? And what BIOS version do you currently have?

 

Assuming you're using Windows, check if you have any software running in the background that maybe increasing the CPU usage.

 

If you used Artic Silver 5 again for the repasting, keep in mind that this paste needs around 200 hours to reach optimal performance:

 

Important Reminder:
Due to the unique shape and sizes of the particles in Arctic Silver 5's conductive matrix, it will take a up to 200 hours and several thermal cycles to achieve maximum particle to particle thermal conduction and for the heatsink to CPU interface to reach maximum conductivity.

Source: http://www.arcticsilver.com/as5.htm

 

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  • Message 9 of 19

Re: Heating issue : ThinkPad X240

2017-10-28, 16:10 PM

No, the heatsink is not new. And there's a slight damage at the tip. Coming to the BIOS, it's 'Phoenix SC-T v2.1'. The temps have become very erratic now (sometimes around 50 deg and more often lie bet'n 70-80 deg). Is there any chance that either the processor or the motherboard could be the issue?

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  • Message 10 of 19

Re: Heating issue : ThinkPad X240

2017-10-28, 20:03 PM

wrote:

Is there any chance that either the processor or the motherboard could be the issue?


Difficult to say, I guess those temps are from HWInfo, right? What does TPFancontrol reports? (provided you installed it)

 

For the BIOS version, you better press F1 when booting and post a screenshot of the first page of the BIOS, it should be something similar to this:

 

 

If the temps remain high, I'll guess the next try would be to replace the heatsink, it's much cheaper then replacing the motherboard ;-)

 

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