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Dell D620 GPU\MB Overheating issue

post #1 of 8
12/18/09 at 1:34pm
Thread Starter 
I have a Dell D620 that is out of warranty. The fan spins up very fast sometimes and it has the nvidea chip set that has overheating issues. For the last few weeks the lcd screen has become pixelated and lines form all around it. The external monitor still works fine though. I though it was the screen but the Dell tech guy told me it was a common GPU\Motherboard issue. I took the keyboard off and saw the heat-pipe but didn't see any dust. If I buy a laptop cooler should this correct the problem or should I apply some Arctic silver 5 on a certain spot or use a speed fan program to increase the gpu fan speed or monitor temps? Anyone with a D620 have this issue? Replacing the motherboard is not an option unless I could find one for around or under $150 but I think they cost more than that.
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post #2 of 8
12/20/09 at 3:49pm
Since you have a DeLL I8kfanGUI 3.0 is the fan control that works well for you, link. I would consider application of thermal paste. I would seriously consider IC Diamond Thermal Compound it seems to be considered better than AS5 by most. Or do a serious Google search for the best. I have forgotten what that is at this time. Now I don't know your system and if for example it uses thermal pads or compounds. As such if pads you could have gap issues using paste check with others who know your model.
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post #3 of 8
12/20/09 at 6:45pm
Thread Starter 
Thanks for the link. I will check it out and let you know how it works. Im running Win 7 64bit so I guess it can run in that but im not sure yet.
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post #4 of 8
12/22/09 at 4:47pm
Thread Starter 
That does not work with Windows 7 64bit. Is there any other program that will work?
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post #5 of 8
12/23/09 at 7:21am
Remove the heatsink and fan assembly and get it blown through with some 'canned' air... Also brush it out with a clean dry paintbrush... This is common on a lot of laptops... Also some will trap a 'carpet' of dust within the heatpipe/fin assembly which needs a bit of poking to remove (a cocktail stick is good for this)...
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post #6 of 8
1/2/10 at 12:24pm
I've got the same problem with my D620. The machine seems to run fine, but using Speedfan or I8KfanGUI shows high CPU temps on my CoreDuo 2GHz.

It seems that this is a common issue with D620 and might have to do with the fact that they use thermal pads (not paste) to interface the heat transfer from CPU to heatsink.

Even at the moment, my D620 cores are 70 and 71 degrees Celsius, and all I'm doing is typing in this forum. The air circulating in/out of the vents is cool and the fans are clean. I've had this laptop appart myself to install WWAN and BT cards, and inspected the fans then (2 months ago). This tells me that the high temp readings are because the chip is hot but the heat is not being transferred to the heatsink. So I think it must be that the thermal pad (crappy shortcut idea by Dell) is rotten.



Check these links...
Disassembly: AhWee.com - How To Disassemble Laptop (Dell Latitude D620) › How To
High Temps and paste: Dell Latitude CPU temperature - AppleNova Forums (yes, an apple forum but some brave soul posted about his D620)
Stuff: http://forum.notebookreview.com/showthread.php?t=345275

I'm going to follow the disassembly guide myself and scrape/clean off the old pad/paste/whatevertheheck and re-apply some good quality paste.

I'll hopefully post the results back here...

Cheerio!

T.
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post #7 of 8
1/2/10 at 2:06pm
Quote:
they use thermal pads (not paste) to interface the heat transfer from CPU to heatsink
All manufacturers use a PAD, as it doesn't evaporate away or 'run' off, plus from past experience, paste does not always make a good contact and can make the overheat issue worse...

On your D620, does the fan throttle up and down... If it doesn't the issue lies elsewhere...
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post #8 of 8
5/30/11 at 8:09am

The Dell D620 suffers from a few issues of temperature control.  Since it suctions air from the bottom of the laptop, the fan blows all kinds of dust into a the heatsink of the unit.  It isn't unusual to find a thick wad of dust on the inlet of this heatsink.  The only way to deal with this effectively is to disasemble the laptop.  Check the fan operation; sometimes the fan power supply fails (not the fan)  this will cause the laptop to shutdown or not to boot at all.  While you have the unit disasembled, change the blue heat pads for thermal paste.  Once you change the pads you have to mind how you tighten the heatsink again; use a cross pattern to tighten them.

 

 

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