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Repair information and troubleshooting for the Dell Latitude 7480, a 14" business-class laptop computer.

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Why does my laptop freeze when I move it?

My Dell Latitude 7480 screen freezes and disturbs when I lift it or shake it slightly and stays like that until I turn it off and on again.

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same here. Dell has changed motherboard and the problem is still happening. When move, it freezes - but not everytime.

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I had this problem everyday until I noticed something: I was picking up the laptop with my left hand to the left of the track pad, and it would crash. I was picking it up with my thumb on top, and four fingers underneath - a common way to pick up a laptop.

Now I pick it up with two hands by the screen, or near the hinges, and it doesn't happen anymore.

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I work in an IT department that uses a large amount of Latitude 7480s and 7490s and I believe it is a design flaw with the machine. When you press down on the bottom cover near the center of the machine where the words “Latitude 7480” are, that is right next to the memory modules and that seems to crash the machine or trigger a BSOD while it is in the operating system.

We have reseated memory modules before and that seems to alleviate the crashing issue, but only temporarily. It seems to recur shortly after. I have had probably close to a dozen machines at this point exhibiting this issue and every time, the only thing that seems to resolve the issue is getting a new motherboard from Dell under our ProSupport warranty.

I have also tried to correlate between manufacturing times and batches based on when we ordered the computer, but seeing as I have had this issue across both 7480s and 7490s (which share the same chassis design), I believe it is just a design flaw in general.

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Thank you very much for your help, and indeed I spoke to Dell and they replaced my motherboard and the issue has gone.

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So glad I have an E6440 now. Not as thin and light as the 7480/90, but it's stable without the IGP - the GPU is what fails in the 6440/6540, especially paired with an i7.

Even then the 7480/90 are too expensive for me right now used - it just sounds like it'll be like some of the Broadwell machines where you see a lot of cost based total outs sold for parts if they're already failing this early in. It must have something to do with how thin some of these 7000 series systems are. The 7470 (Skylane) isn't as bad as the 7480/90.

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@nick Agreed. I think our company machines actually started around the E6440s and since then we've been moving up the 7000 family as they come out. 7440s, 7450s, 7470s, 7480s, 7490s, and now some of the newest 7400s. The previous design of 7440s to the 7470s seem to be much more solid when it comes to hardware.

We have had numerous issues with the USB-C docking connector, as it is nowhere near as solid a connection as the older styles with an actual dock - we've had multiple machines where just jiggling the USB-C connector causes the connection to disconnect. Not to mention numerous driver issues relating to the USB since this style dock uses all USB drivers instead of port replicators. We've often had to update BIOS and drivers as new windows updates often caused problems with USB devices - one time dozens of people's external mice and keyboards stopped working after a Windows update came out.

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Finally, the biggest issue of all we have with the 7480s and 7490s is that the TPM chip seems to malfunction at random. By default when the TPM is on you are able to see the TPM and reset it from Windows 10. But sometimes, the chip just disappears and the machine isn't able to detect it anymore, or it just suddenly isn't able to clear or provision anymore. I'm not sure yet how to fix that issue but from some troubleshooting it seems like it involves either updating the BIOS, draining all power from the machine, or in some cases, Dell has just sent us a new motherboard the moment we mention the word "TPM."

This causes two major issues for us - we can't reliably implement Bitlocker for encryption because if the TPM fails we may lose decryption keys. Second is Microsoft Office - Office 365's modern authentication uses the TPM for added security - when the TPM fails, Outlook and other O365 desktop apps are unable to sign in, giving an endless "Needs Password" loop or just not displaying the login box at all.

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@kevinsun242 Yep - sounds like the dual GPU E6540 I had. Went through 3 of those before I found one that held up. That's why I went with a HD 4600/4300M E6440 besides the fact you can snag them cheap if you barter hard enough. It sounds like the 130W chargers I had to go through before I got a good one - Dell just sent new ones out whevever I got the dreaded orange/white battery blink. I think they treat people who can do the troubleshooting themselves so well is because we're able to spot systematic hardware issues others miss and don't want to deal with having to hear a rep trying non-fixes out. The more you see "as-is" due to anything but a No HD sale, the worse. These sound like a machine I'd sell after getting it repaired and use the money to buy something else with the issues you've had. Yikes!

The 7480/90 sounds like it's on the list with the 7250 where I'm avoiding them due to to excessive hardware issues. The 7240 is there for using mSATA - which you can't find a new drive for from a name brand - the use of mSATA on the 7250 is a bonus reason. I'll just have to buy the 7480/90 with caution I guess - if I see bluescreen or RAM issue, look elsewhere.

There are times I have questioned why I bought a 6000 series seeing how much more the 7000 series goes for without the HD (which I'm able to replace), but knowing the 7480/90 are bums makes it hurt less, although I wish they included 4 USB3/1 eSATA+USB2 and made the DVD drive external, but a factory option like the E6220/30. Also the lack of a ULV processor helps :-). Can't stand ULV 14/15" machines if I can avoid it - give me a M/QM/MQ/H/HQ over a U series. Normal users don't notice (especially with cloud based applications like Office 365) but I can't unsee the performance penalty so I avoid them when I have a reasonable out.

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Without having the computer myself. I m going to guess the Hard drive is not seated properly. So it might be a bit loose and disconnects a bit. Here is a video on how to open it and get to it. Assuming yours has SSD. https://www.youtube.com/watch?v=DoFzRc9C...

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I have the same problem. I don’t think it is the M2 device. Checked it, cleaned it and reattached it -> error happens again.

I have figured out that it only happens when you move the laptop holding it on the upper left side and apply pressure on the downside of the system. So maybe it is connected with the battery cable. I have fixed the battery cable to the jack tightly and will look if it happens again.

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