Given everything you’ve described so far, the “it could be many things” statement is true in general – but in
your case, a lot of the realistic software/OS causes have already been heavily narrowed down.
Why it’s very likely the laptop, not “just Windows”
From what you’ve posted earlier:
- Your Dell dock works on other Dell laptops in the store.
- Your driverless hub also doesn’t work properly on your Latitude 5340.
- Dell support is already struggling to source a replacement motherboard and screen and is talking about escalation / possible replacement device.
That combination is a huge red flag for a hardware/firmware issue on the 5340 itself:
- If it was just Windows, the driverless hub should normally still behave, and a clean install would usually fix it.
- If it was just drivers, the same model dock/hub would often show similar problems on other machines with the same driver stack – but they don’t.
- The fact that both an active dock and a simple hub have issues points squarely at the USB‑C/TB interface (hardware or low‑level firmware on the laptop).
You
can always keep going with more “process of elimination” (clean Windows ISO, Linux Live USB test, etc.), but once Dell themselves are treating it as a hardware case and can’t easily get a board, there’s a point where more tinkering is just wasted time.
If you still want to sanity‑check before the replacement
If the laptop is still in your hands and you want one last quick check:
- Update to the latest BIOS from Dell’s site (if you haven’t already).
- Boot a Linux live USB(Ubuntu, Mint, etc., no install needed) and:
- Test the dock and the driverless hub there.
If they also fail or behave weirdly in Linux, that’s almost definitive evidence the issue is below the OS level – again pointing to hardware/firmware on the Latitude.
Given the current status
Since:
- The 5340 is effectively EOL,
- Dell can’t easily source core parts (motherboard/screen),
- They’re already talking about escalation if this drags on,
the most productive path now is to let Dell complete their process (repair or replacement) rather than burning more time trying to “fix” what is almost certainly a failing platform.
Once you get the repaired/replacement system, plug in the same dock and driverless hub:
- If everything works out of the box, that pretty much confirms it was the 5340 hardware all along.
- If it still breaks on the new system, then it becomes worth digging deeper into OS / drivers / specific dock firmware versions.
So yes, in theory it could be many things; in practice, in your specific case, all signs point to the laptop itself being the problem, and Dell’s current handling supports that.