10-16-2015 07:26 PM
I was using my old T40 today, and noticed that the cooling fan is developing a constant (when running), very quiet, and very high-pitched squeal (it is a constant "eeeeeeeeeeeeeeeeeeee"). I have never heard this before. Tilting and rotating the laptop seems to make no difference. Obviously, a fan squeal is a sign of dirt or bad bearings, etc., but is this a reason for imminent concern?
I am pretty sure this is the cooling fan cecause the noise stops when the cooling fan turns off, and sounds as long as the cooling fan does. Also, it is from the left side of the laptop, and the hard drive under the right side sounds fine.
And is 53 degrees C/127F very hot for that age/generation of parts?
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10-17-2015 07:06 AM
Depending on how you measure the temp it could be normal. The cpu chip could be considered normal running in the mid 80c degrees under load and mid 60c degrees with moderate use, but if the actual body of the laptop is reaching 50c you may have a serious problem. I recommend you open up and clean your fan. Get some good quality thermal paste for your CPU chip such as Arctic Silve 5 brand. You can also use some light machne oil like commonly used in sewing machnes or razors to oil the fan shaft. it's been a while since I've worked on a T40 but I recall they are pretty easy but the fan may be rivited on the heatsink so a dremel grinder to remove the rivits and some adhesive that can tolerate heat lke 3M brand "super weatherstrip adhesive", or epoxy, or even superglue should work nicely. The fan motor isn't normally serviced separately but there are aftermarket fans avalab.e to replace just the motor and they work well as long as you get the proper one and they are also very cheap compared to replacing the whole heatsink/fan assembly. I think I paid about $12 for the last fan motor I bought, maybe even less, but often cleaning out the dust will stop nose and improve cooling.
05-09-2016 08:12 PM
05-09-2016 08:26 PM
I generally like to clean my fans and replace the thermal paste every couple years and you are talking about a model close to 15 years old, so my guess is your thermal paste has turned to a hard crust and any bump or jolt over the years has broken the seal between the heatsink and cpu so you don't have effective heat transfer combined with the fact that your fan is probably full of dust. This is pretty easy to fix, just get some medical alcohol to clean the chip's die and heatsink and some Arctic Silver #5 thermal paste. After cleaning make sure the cpu is covered with paste, not too much, not too little, and you should be fine. Hopefully this will make a big difference.
07-07-2016 08:21 PM