Re: Dell Inspiron 1525 Overheating (?)
- From: quadzila@xxxxxxxxxxxxx
- Date: Thu, 20 Jan 2011 22:34:42 -0500
On Tue, 18 Jan 2011 11:23:46 -0600, "BillW50" <BillW50@xxxxxxx> wrote:
Dan, the first thing I'd do is try to use a can of compressed air and
blow the hell out of it ..... ie: removing some bottom compartment
doors as well as in the vents. Of course if you are so inclined,
remove the keyboard and blow inside the laptop. Also I recall Ben
Myers mentioned a fan type software that will monitor the cpu temps
and make the fans blow according to those temps. It also has settings
so the defaults can be changed. You may want to check back some in
this newsgroup for that software or Google for it or the like.
And just to add to RnR comments, a laptop running inside of a case is
very bad. As laptops first measure of defense due to overheating is to
kick the fan speed up higher. And about the only thing it checks for is
if the fan RPM speed matches to what it is supposed to be doing. So
inside of a case, the laptop thinks all is fine and nothing to worry
about.
Although it is not! As no cooler air is coming in and the hot exhaust
air can't go anywhere. So the temperatures get higher and higher until
the second line of defense kicks in. And this one should never kick in
under normal conditions unless the air flow is restricted. And this is
like an emergency shutdown. And they normally have this set so close to
the temperature of having permanent damage to the chips that some can't
take this condition more than say 6 times or so before there is
permanent damage.
It sounds like yours isn't damaged yet when it is cold. But it sounds
like the high temperature isn't as high as it used to be before it
drifts into thermal runaway. So now you have two choices, either replace
the damaged chip(s), or increase the fan speed. The Intel T5800 CPU is
often socketed so it could be replaceable. Although they are not cheap,
although the prices for used ones are generally pretty good on places
like eBay.
There is no guarantee that replacing the CPU would solve it (but it is
very likely it will). And you don't have to get the more expensive 2GHz
CPU, you can put in less if you want too. Also the other chip that could
be effected could be the video chip. I don't know which one yours has,
but if it is the Intel integrated graphics, you should be safe. As they
are not normally heat sinked. And it isn't the integrated graphic chip
that takes the heat anyway, but the northbridge and the CPU does
instead. And the northbridge is almost never in a socket. Neither are
most other video chips either.
So this is what I believe you are up against. Troubleshooting why a
laptop turns on by itself can be difficult to find the cause of it.
Often it is best just to remove the battery and then you don't have to
worry about it. And some laptops like this one I am on now will turn off
in X amount of seconds if nobody touches a key or the mouse after it has
been turned on. After you did either, it stays on as long as you want.
Thank you Bill and RNR for your replies. Are all laptops designed to
automatically shut down at a certain temperature? I ask because mine
never did. I understand that there's a BIOS setting the auto shutdown?
I really don't think the CPU was damaged as even though for a while
there I was operating the laptop while it was in a carrying case, it
was still getting a decent amount of ventilation. It's a fairly new
laptop and was always kept in a carrying case so there should be
minimal dust inside.
Anyway, I downloaded Speedfan and noticed my fan starts to become much
louder at around the 115°F temperature. Thing is, I don't have a
problem with the fan speed/noise but my system seems to slow to a
crawl when the temps are in the 120+ °F range. What's causing this
slowdown, is it the actual temps of the CPU or does the fan put a
strain on the rest of the system when it's spinning so fast causing
the slowdown? If that's the case, it looks like I can use Speedfan or
some other method to stop the fan from spinning so fast until it's
really necessary. And from what I've read, the maximum temperature for
the Intel T5800 chip is 90°C (194°F) so according to Speedfan, my CPU
is at a safe temperature?
Thanks again for your help!
Dan G.
.
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