Is Your Laptop Overheating? - Comments Page 1

EMERGENCY COOLING PAD

During our last heat wave, I came up with this emergency (or "poor man's") cooling pad:

Take a shallow, rectangular plastic container w/lid, that fits comfortably beneath your laptop. Remove the lid, fill with ice, then replace the lid. Set laptop onto container, and you're good to go!

We have been using some of our laptops for 9 years in classes. We put rubber door stops under the back of the laptop to raise it from the table. We can then get some airflow under it. The door stops were purchased from the $1 store at 3 in a package for $1.00. A very economical solution for a club that does not have a large budget. I also use them at home on my wooden desk with no excessive heat problem.

A laptop has its place, hot though they may get. But if portability is not really needed, a desktop configuration is cheaper, faster, cooler, and will last longer than a laptop. Those desktop aficionados really are cool folks IMHBCO (in my humble but correct opinion).

Laptops have a small passage way, that pulls air from outside, to the heat sink, or one from the heat sink to the outside. This gets plugged up with lint. You have to take the cover off the bottom, and blow it out with compressed air, along with the fins on the heat sink. I fixed one that had it so bad, the bottom of it would burn you in a couple of seconds, then it would shut down. I cleaned out the large fuzz ball, and removed the heat sink, then cleaned it with alcohol and applied Arctic silver thermal paste. Then reformatted it with windows 7, and it runs perfectly to this day. Also putting them on blankets or pillows is the worse thing you can do. The guy was lucky he didn't take it to a shop, There's a very good chance he would have gotten the universal diagnosis of "Bad Motherboard that will be 300 dollars sir" I can't tell you how many times I have done simple repairs, that were supposedly bad motherboards. So if you have one that's getting super hot and shutting down it's probably a big fuzz ball packed in the tiny little passage way. But after they have been really hot, it's a good idea to re apply thermal paste, because it looses it's ability to transfer heat as well as it should. On some laptops you can only access it by removing the keyboard and monitor, but if you download the service manual, it's not very hard, unless you are really bad at tinkering with stuff. Then most people have at least one friend who is good at stuff like that. Remember Google is your friend.

My laptop overheating problem was solved instantly by blowing out the dust with a can of compressed air. Everytime it begins to consistently run too hot, I blow it out again and the problem stops.

I have had two Toshiba laptops in my household, over the past 6 years. Both of them kept shutting down due to overheating. The latest one is a Satellite A210-04f, Model PSAFGC-04f08c. I will never buy another Toshiba Laptop again. It seems that they can't build/engineer a laptop to stop this recurring problem.

When you are running on batteries, your laptop screen intensity drops and the CPU generally runs slower, so you use less power and should not need additional cooling, unless you are blocking the air vents.
When you are plugged into AC power and need extra cooling, use external power for the cooling fan instead of drawing more power and generate more heat in the laptop.
Never place a laptop on a soft surface like a rug or foam surface as it will block the bottom air inlets and increase the laptop's internal heat.

With your notebook unplugged and turned off, I have blown some dust out of the fins and fan area. Can you take a vacuum and do a better job of cleaning out the dust bunnies clogging the fins and cooling path? What if you have a bad fan? How hard are they to change out? Can you get easy access to the fins/fan to clean them out?

Russ

HI Bob,
Even though they're called laptops,it's actually not a good idea,to put them,on your lap,or any other soft,flexible surface.If the PCs are placed there,it usually blocks the vents,& makes the computer run hot,even if the fan is always on.It's always best to use a laptop,on a hard surface,like a desk or table.If you have to use it,on your lap,it's a good idea,to possibly carry a thin board,that fits your laptop,& can be carried with you,in your laptop case.Even if you use an active cooling pad,as I do,you would still need a board under it,to vent the cooling pad.BTW,I really like your tips;thank you for them.

As a 57 year old electrician/electronics tech I agree with everything you said and would also add that heat is an enemy and a warning sign for any device that consumes electricity.
This applies to electric panels, tv's stereo eqp, etc. as well as laptops.
Even a modest amount of air circulation, such as a paddle fan or room fan will drop eqp temps by a noticeable amount.
How hot is too hot? Most people feel a pain threshold of approx 140-145 deg F, so, as you pointed out, if it's hot for you, it will shorten component life too.
I look for heat buildup when troubleshooting electrical devices. Check receptacles, power cords, and plugs for noticeable warmth, especially when using high amperage appliances (and space heaters!)
Keep up this excellent site Bob, I have learned a lot here, every now and then, I can contribute something useful.

Am I missing something here, or is it just too hard to put the computer on the table? If you are sitting with it in your lap for so long that it is burning you, maybe the problem isnt with the computer but with you spending too much time on the computer? If I am missing it, then someone needs to invent a pair of pants with heat sinks in the top crease seam---hey, now theres an idea! Anybody have any Chinese manufacturing connections???

My son uses a laptop cooling pad & swears by it. I bought a pair of stick-on legs for my laptop. They fold out like the legs on a keyboard and prop up the back of the laptop. So far my laptop seems to be running cooler with them.

The big issue I find is asinine engineering that puts the intake vent on the BOTTOM of the laptop where, you guessed it, your LAP is! Now I know the older Dell C800 series had the intake vent on the top, so why did they, in their wisdom, move it to the BOTTOM of the unit on the D600 series?

Cooling on a MacBook Pro is handled thru vents that share the hinge for the screen rather than holes on the bottom and sides. The two internal fans barely move air. I've tried coolers with fans but the fans only wash the bottom of the case with moving air. No cooling there. I've tried a cooling pad that was absolutely worthless. I've found a program called SmcFanControl that helps speed up the internal fans to provide more air movement. There's a similar program for the Windows side when I run dual boot in WinXP. I've found that XP side runs considerably hotter than the Mac side. Add Photoshop or graphics heavy programs and the MBP will burn up without the fan control progeram. I wish someone would design a fan for Macbook that matches up with the hinges and moves the air out of the laptop and thru the fan device. One that costs $20-30, not $90-100 like most Mac products.

I don't know why you're treating burns from a laptop as mythical... I dozed off one morning before work in my recliner with my work laptop and ended up late for my morning IT meeting not because I woke up late but because I woke up with burns and a couple of large blisters.

That was 2 years ago now and I still have scars from it, and it wasn't even a laptop known for running warm, it was a Thinkpad T60p. I've found Dells run much hotter, I don't dare actually using them in my lap without setting them on a pillow or something. The trick really isn't that it needs to get as hot as something that would normally burn you, it just needs to be warm and pressed up against you without moving for a while.

One simple solution for overheating is to check the little grille underneath your laptop where the fan sucks in air. If it's clogged with dust, your fan isn't working at top efficiency. A quick pass over the grille with a vacuum cleaner periodically can make a huge difference. (Same applies to desktops.)

What surprises me about my Dell laptop is that when I shut the lid it does not go into a deep sleep. Thus, if I forget, and put it in my bag, then when I take it out the fans are running and it is about to melt. This seems odd (and didn't happen with my old Toshiba). Closing the lid seems to me to be a clear indication that it should be in a state to be put away.

Hey Bob,

I purchased a laptop stand from http://keynamics.com/ and it works great. It allows plenty of airflow and tilts the computer so I don't have to bend over to type. It also comes apart to fit in my computer bag.
Thanks for the great newsletter.

I have a Compaq Nx6325 which takes only 5 minutes to remove, clean and install the fan. 2 screws, 3 clips and the keyboard comes away to allow fan removal.

A good design for maintenance. Pity others aren't as easy.

I built an active one from a piece of ply, four pieces of timber, 2 old desktop power supply fans and a 240vAC to 12vDC transformer.

The vents weren't blocked by fluff. It's just that I run it in full power mode nearly all the time. I only actually turn on the fans when the laptop starts running too hot. The rest of the time it works quite well as a passive system. The additional gap (approx 25mm ~ 50mm fount to back) between the laptop and the desk makes a hell of a difference.

Some programs I run push the temps up to the point where without additional cooling, the laptop overheats and shuts down. Most notably, FL Studio, Cubase 5 and SecondLife.

Not sure I like the idea of USB powered external fans, because one of the main things in a computer that generates heat besides the CPU and GPU, is the power supply. So running additional fans from it is like robbing Peter to pay Paul. The more strain you put on the power supply, the hotter it gets, the more cooling it needs.

Nice work by the way Bob. Thanks for the great articles.