Dell Latitude E5470 Video Issues

[Spec_tech]

Hey everyone. So i'm having a weird issue with my Dell Latitude E5470 Windows 10 laptops' video, but i have a theory or idea on what the issue is.

So randomly, after several months of using it, the video started going haywire with geometric distortions that make the screen mostly unreadable.
I did some troubleshooting and found that the issue only occurs when booted to an OS that has the official Intel Display Drivers actively running.
The video is fine in safe mode, normal mode when updated Display drivers aren't installed, and other bootable live OS's that don't use the Intel drivers.

I've already tried doing a fresh reinstall of Windows 10 to rule out any OS issues and the issue is still ongoing.
I've also gone through the Dell Onboard Preboot Diagnostics and ran the screen and CPU tests and they've both ran fine.
There are cracks in the screen bezel at the top left and right corners, so i thought it might be a screen issue, but the screen test ran fine like i said. And the screen works fine in other modes like i said above.

I also found the Windows Update will automatically install the Dell display driver as soon as it gets an internet connection, so i've had to keep the internet off while troubleshooting sometimes.

My only conclusion is that, since knowing that the graphics processing is done on the CPU, the GPU/CPU is malfunctioning and somehow causing this.
Now this is only a theory, but this is the only one i can come up with know the symptoms.

Now i'd rather not buy another CPU and rip open the laptop to replace it, but it's the only options I can see right now.

Is this theory sound? Or am i missing something?

 

[thetechfreak]

Seems like a hardware issue of the monitor if a windows reinstall. Probably a broken GPU if not anything else(as you said it works in other modes). Try different driver version and see if it helps

 

[Spec_tech]

Seems like a hardware issue of the monitor if a windows reinstall. Probably a broken GPU if not anything else(as you said it works in other modes). Try different driver version and see if it helps

So i tried different driver versions and they all did the same thing. Issue only occurs when the official drivers are loaded anyway. Plus the bad image also shows up in remote viewing applications like TightVNC and whatnot (with the driver installed of course), so makes me think it's just the GPU. I'm just going to block Windows Update from installing the video drivers and just leave it at that. Too much work, time, and effort to try to replace the entire CPU, if it is replaceable which i don't think it is.

 

[VirtualLarry]

So i tried different driver versions and they all did the same thing. Issue only occurs when the official drivers are loaded anyway. Plus the bad image also shows up in remote viewing applications like TightVNC and whatnot (with the driver installed of course), so makes me think it's just the GPU. I'm just going to block Windows Update from installing the video drivers and just leave it at that. Too much work, time, and effort to try to replace the entire CPU, if it is replaceable which i don't think it is.

does it do it in linux? I would check video bios. in Linux.

 

[Fardringle]

You said it's a problem when the official Intel drivers are installed. Does it do the same thing when you install the GPU drivers from Dell?

https://www.dell.com/support/home/e...scode=wt64a&productcode=latitude-e5470-laptop

You can't actually replace the CPU in that laptop. You would need to replace the entire motherboard since the CPU is soldered onto the board.

 

[taisingera]

Do you have a spare monitor that you could hook up via HDMI? Check to see if it happens on that, if not, then it is the screen, if it still happens then either the GPU/CPU or the screen itself is the problem.