Seeking Advice: Repairing Dell U3425WE Monitor with Faulty USB-C/Thunderbolt Ports

[Borse2008]

Hi everyone,

Looking for some advice or opinions on what to do with a monitor issue I’ve run into. Apologies in advance is this crossovers a few forum categories.

I have a Dell U3425WE, which I've recently replaced with another model. That said, the original unit is still fully functional in terms of the display — it works perfectly over HDMI and DisplayPort. However, the USB-C and Thunderbolt 4 ports have stopped functioning correctly. The Issue:

• The 90W Thunderbolt 4 port (circled in the photo) no longer charges or powers any device, including laptops or MacBooks.
• There’s no visible physical damage to the ports or monitor body.
• I’ve already performed all available resets and completed firmware checks — no change.
• The display itself works fine, just not the USB-C/Thunderbolt ports.

What I’m Looking For:


Ideally, I’d like to get this repaired. Dell has published teardown and repair instructions (linked in the post), so I’m reaching out to see if:

1. Anyone in the UK, preferably Manchester, has experience with this kind of repair.
2. Someone could diagnose or test the ports to confirm if repair is even viable.

Temporary Workaround:


I'm currently using a generic USB-C docking station, which works well enough for now, but I’d like to restore full monitor functionality if possible.

Purchase Details:

According to the serial number, this unit was purchased in March 2025, so it's still fairly new — unless it was defective from the outset. The monitor has been boxed backup awaiting for the next steps if Dell decide to get a courier to come for it but if they don't id be happy to pay an experienced person to test the modular thunderbolt controller to see if anything is known to be a fault.

Any suggestions, experiences, or local repair contacts would be greatly appreciated


Dell UltraSharp 34 Curved Thunderbolt Hub Monitor - U3425WE Teardown Instructions

Thanks in advance!