Laptop running VERY hot

I've just bought a second-hand laptop, a Sony Vaio VGN-SZ1HP/B, and it runs VERY hot to the touch. So hot, in fact, that I can't touch the bottom left-hand side of my machine for longer than a few seconds without having to pull my hand away.

I downloaded SpeedFan and checked out the computer's temperature, and it doesn't seem too high (I think -- although the little flames on the screenshot don't inspire confidence).

Is the machine OK? Should I be concerned? It runs a Core Duo T2300 with a GoForce Go 7400.

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UPDATE: Since I posted this question it seems to have cooled down. I can hold the computer now without having withdraw my hand. It's hot, but not so hot that it would burn my fingers. I took another reading (below). Is it OK for it to get "$%*#!" hot during heavy loads?

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Django Reinhardt

Posted 2011-08-20T17:10:53.237

Reputation: 4 183

Does Task Manager show anything taking up lots of CPU? – user541686 – 2011-08-20T17:18:27.570

Perhaps the battery is faulty?

– RedGrittyBrick – 2011-08-20T17:20:37.950

1The reason it is hot at first is most likely because the boot causes a lot of CPU. – Tamara Wijsman – 2011-08-20T19:32:06.197

It is running hot and seems some process is utilizing cpu. You should be concerned. Which OS are you running on laptop? Is it Windows XP? Windows Vista? Windows 7? Or Linux? – TusharG – 2011-08-20T17:22:21.957

Answers

So hot, in fact, that I can't touch the bottom left-hand side of my machine for longer than a few seconds without having to pull my hand away.

This is what we (at our shop) call "The Holy S##T! Test". If you can't touch it for more than a couple seconds without pulling your hand back and yelling an expletive, then something is WRONG. Often used for checking cooling unit, drive and component temperatures. :)

Nothing should be that hot, regardless of temperature readings and such.

My blind guess would be that the cooling fan is malfunctioning, a heat-pipe is fractured, or the vents are plugged. Also, the 'bottom left' is often the hard drive location.

Ƭᴇcʜιᴇ007

Posted 2011-08-20T17:10:53.237

Reputation: 103 763

I'd agree with techie, try and blow some canned air into the vents and see how much dust comes out. If it's second hand, I'd try and strip it down and make sure it's not clogged with pet hair or anything like that. – Col – 2011-08-20T17:33:30.617

Well I'm going to have to eat my words. Since I posted this it seems to have cooled down. Yes it can reach those temperatures, for sure, but it seems that it also can be quite hot, but not so hot that I can't keep my hand there. – Django Reinhardt – 2011-08-20T17:45:34.540

2@Johnny W That's still not good, it shouldn't get too hot to touch at any point. Take it someplace and get it examined and/or cleaned, should be pretty cheap to get done. Or perhaps study up on how to do it yourself and save a couple bucks, as Col suggested. :) – Ƭᴇcʜιᴇ007 – 2011-08-20T17:47:48.000

I can always open it up and take a peek, I guess. Thanks for your advice. – Django Reinhardt – 2011-08-20T17:49:45.440

1@techie007 I wouldn't say that's "too hot". Laptops can get hot, especially places where ambient temperature is high (example: my city). Under load, the temp's are always 70-80. – Sathyajith Bhat – 2011-08-20T17:57:06.623

@Sathya If it's too hot to touch with your hand for more than a few seconds, as the Johnny W suggests, then it's too hot. This is a consumer-grade device and people will sue if they get burned. :) – Ƭᴇcʜιᴇ007 – 2011-08-20T18:03:00.770

Interestingly, here's someone else with a very similar laptop complaining about the same thing: http://ask.metafilter.com/77393/Extremely-hot-laptop

– Django Reinhardt – 2011-08-20T18:06:43.757

Well I opened it up, took a can of compressed air, and cleaned up the fan and heatsink as much as I could. Not much dirt came out, so I wasn't hopeful, but now it runs very cool indeed! Superb! – Django Reinhardt – 2011-08-25T00:38:49.713

1@Johnny W Yeah it only takes a single dust bunny to make a big difference sometimes. :) Glad to hear it's working better. – Ƭᴇcʜιᴇ007 – 2011-08-25T01:01:22.780

Identify the release date of the GPU, which is close to the time the laptop was purchased.

GPU-Z shows this information. It allows you to see how old the laptop actually is...

Identify the install date of the OS, using the command systeminfo and looking for the entry Original Install Date which will give you an idea how long they have been using the OS.
Try your laptop without the battery, this will give you an idea if the battery is the cause.

Blow the dust out of the fans, according to the thread you link your laptop could be 3+ years old.

If that doesn't work? Try to identify whether the fans are actually working, or if there is damage.

You might need to re-apply thermal cooling paste, perhaps the previous owner messed up...

Tamara Wijsman

Posted 2011-08-20T17:10:53.237

Reputation: 54 163

Thanks for your illustrated answer :) To go through each point, though: Surely I can tell the release date of my computer by looking for reviews of the model number? (Four years old) 2. The OS has been reinstalled... I'm not using XP! :) 3. No heat is coming from the battery, thankfully. 5. I doubt the previous owner applied any thermal paste (I know the previous owner and he was very tech ignorant). I think four is the best bet (and also hoping that the heatsink isn't cracked). – Django Reinhardt – 2011-08-20T20:04:31.227

I had the same problem. You may find that when you lift your laptop off of the table and feel the table surface that it is very hot. The air intakes are under the computer and heat is being stored in the table - preheating the incoming air to the laptop to nearly 100F. You may also note that just by lifting the laptop and letting it take in cool air the fan slows down and the unit cools. There are coolers available to put under a laptop - just make sure that they don't close down the air intakes.

Take care.

James Moore

Posted 2011-08-20T17:10:53.237

Reputation: 1

Check the CPU usage at task manager, something might consume %100 CPU.

Check the fans, it they blow or not.

Nime Cloud

Posted 2011-08-20T17:10:53.237

Reputation: 923

100% CPU shouldn't cause your laptop to be untouchable; if it's the case then it's most likely something with your laptop rather than your OS. My laptop was at 100% CPU, 100% GPU, 100% I/O for an hour yesterday and I could still browse around Super User without feeling too much heat; and yes, temperatures were around 85°C but proper airflow prevented the chassis from overheating... – Tamara Wijsman – 2011-08-21T00:33:50.563

SpeedFan can say CPU and system fans speed. Better take a screwdriver and remove some screws and look at the inside of the laptop. – Nime Cloud – 2011-08-21T02:03:38.013

Pictures are provided, typically no fan speeds shown on a laptop. – Tamara Wijsman – 2011-08-21T03:04:05.857

SpeedFan can display current fan speeds and adjust them to prevent noise, old machines don't have smart fans so we used SpeedFan. Notice the scrollbar, it's at the bottom. – Nime Cloud – 2011-08-21T03:21:48.277

You are repeating yourself. Read what I said. Look at the pictures provided...

– Tamara Wijsman – 2011-08-21T03:23:19.320

SpeedFan is not showing any fan speeds for my machine. – Django Reinhardt – 2011-08-21T03:42:00.317