Forum Thread

Laptop overheating when using external monitor

emelvee 40,166 2,053 December 4, 2012 at 05:06 PM
I have a Dell Vostro 3500 and recently purchased a cheap Dell 21.5" monitor...the laptop heats up like crazy and shuts down (I figure due to the heat). I close the case and elevate the laptop about an inch for ventilation; still have the heat issue. I haven't tried a cooling pad. Any suggestions, or can the laptop just not handle the external monitor?

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disgruntled caveman
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#2
Try lowering the resolution of the external monitor. Also, try opening the lid and just changing the display settings to display on the external monitor only.
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Baldilocks
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#3
I'll try those...thanks.
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#4
Quote from emelvee View Post :
...I close the case and elevate the laptop about an inch for ventilation; still have the heat issue. I haven't tried a cooling pad. Any suggestions...
"close the case"? To what case are you referring? Are you running the laptop in an enclosed area of some sort? How do the laptop's heatsink exhaust fins look to you? (see bottom left of image) If there is any noticeable amount of dust, give it a good blast with compressed air (while off, of course). A cooling pad should also be worth trying.
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Baldilocks
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#5
Quote from skyynet View Post :
"close the case"? To what case are you referring? Are you running the laptop in an enclosed area of some sort? How do the laptop's heatsink exhaust fins look to you? (see bottom left of image) If there is any noticeable amount of dust, give it a good blast with compressed air (while off, of course). A cooling pad should also be worth trying.
The monitor/lid...I was closing it as I would if I were transporting it. Don't notice any dust. It sits in a keyboard drawer, but I've been keeping the drawer open.
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Let Sleeping Dogs Lie
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#6
the other question is do you have a cat?
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Baldilocks
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#7
Quote from komondor View Post :
the other question is do you have a cat?
laugh out loud yes...a two year old Himalayan
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Let Sleeping Dogs Lie
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#8
ah good chance you may have cat hair in your laptop take your vacuum cleaner to the vents and see if you can suck anything out then try a can of air
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#9
Please don't vacuum your laptop. It would really suck if you fried it with ESD.
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#10
Quote from emelvee View Post :
I have a Dell Vostro 3500 and recently purchased a cheap Dell 21.5" monitor...the laptop heats up like crazy and shuts down (I figure due to the heat). I close the case and elevate the laptop about an inch for ventilation; still have the heat issue. I haven't tried a cooling pad. Any suggestions, or can the laptop just not handle the external monitor?
Does your laptop screen stay on when you close the lid?
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Baldilocks
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#11
Quote from RockySosua View Post :
Does your laptop screen stay on when you close the lid?
No...
At least I'm pretty sure it doesn't - isn't it kind of like a refrigerator light? laugh out loud
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#12
if you're closing the monitor/lid of your laptop when you use it with your external monitor, that could be the problem. a lot of heat gets radiated through the keyboard, and many laptops have insufficient cooling via the built-in fans. closing the lid works to trap the heat that would otherwise dissipate through the keyboard area. try leaving the lid open. if it still overheats, your external monitor may be running a much higher resolution than the built-in monitor and is causing your video card to work harder, in which case lowering the resolution as someone else posted would be the solution.
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#13
Quote from emelvee View Post :
No...
At least I'm pretty sure it doesn't - isn't it kind of like a refrigerator light? laugh out loud
By default, it would be set to turn off, but yours may be staying on and that would cause it to heat pretty quickly.
Lots of people close the lids of their laptops to operate external monitors, with no problems at all, but it is possible that yours does heat up a bit more that way. and all you have to do to find out, is to leave the lid open while using the external and see if that solves the problem.
Having the external in high rez has been mentioned by others as possibly being the culprit. I've never heard of such a thing, but again, its an easy test to find out, just by lowering the resolution.
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Baldilocks
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#14
Thanks everyone...I'll be fiddling with this tonight.
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L10: Grand Master
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#15
I agree with everyone. Blow the dust and cat hair out of the vents with a can of compressed air. Then try opening the laptop a bit during use. Most laptops suck air through the keyboard a bit for cooling.
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