Unsolved
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2 Posts
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1152
September 4th, 2024 22:53
USB-C External Monitor No Longer Working on Precision 5680
Issue: External USB-C monitors are not working on user's laptop(External monitor powers on but does not detect display). User tested a keyboard and mouse in this same port and they worked fine. User tested the Monitor on another user's device and confirmed they worked there. Issue is tied to user's computer.
Troubleshooting Completed:
Ran Windows update
Ran Dell support assist
Ran Dell command update
Verified no drivers exist for these external monitors (plug and play)
Tried BIOS versions 1.11.0 and 1.13.0
Confirmed all USB-C ports are enabled in BIOS.
Tried on all available USB-C ports on laptop.
Uninstalled all USB drivers from Device Manager.
Ran sfc /scannow
Rebooted multiple times.
Did a fresh install from complete factory settings(Windows install USB).
Installed Intel Serial IO Driver 30.100.2237.26_A01_05
I ended up having a spare laptop that's the same exact make and model. I confirmed that laptop is also having the exact same problem.
This external display works on any other Dell Laptop I have.
Confirmed all applicable BIOS settings for USB ports are enabled.
Findings:
IDK!
Looking into it I'm seeing multiple threads from multiple brands reporting the same thing. I'm even seeing threads on this from Apple. Has anyone seen this recently within the past 30 days? If so have there been any successful troubleshooting attempts?
A few examples of RECENT reports: https://www.reddit.com/r/DellXPS/comments/1f7j7q2/issue_with_connecting_additional_monitors_via_usb/ https://www.reddit.com/r/UsbCHardware/comments/1f6gkrs/external_monitor_stopped_working_over_usbc_hub/ https://discussions.apple.com/thread/255710632?sortBy=rank https://www.reddit.com/r/Lenovo/comments/1ezr0ze/dell_monitor_not_connecting_with_display_port/ https://www.reddit.com/r/Dell/comments/1f4bn4m/dell_u2520d_usbc_connection_stopped_working/
Precision 5680
BIOS 1.13.0
Win 11
Microsoft Windows 11 Pro
niko_ke
2 Intern
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768 Posts
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September 5th, 2024 01:07
When the USB-C port is connected to the monitor and the display fails, I recommend trying to discharge the static electricity on the monitor, that is, disconnect the power supply and press and hold the power button for 40 seconds. Although it sounds strange, it has solved the problem many times. If you are interested, you may want to try it. If discharging the static electricity on the monitor alone does not work, you can also try discharging the static electricity on the host.
DellMachineUserHelpRequest
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September 5th, 2024 14:20
@niko_ke What would be the necessary steps to discharge host? I've seen that around a few forums but from I've seen it's power off the laptop, hold power button down for 30+ seconds, turn laptop back on.
Where this fails for me, and this could just be from me misunderstanding the steps, is that when I turn off the laptop, holding the power button down just turns the laptop back on.
niko_ke
2 Intern
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768 Posts
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September 6th, 2024 02:33
@DellMachineUserHelpRequest If the machine turns on by long pressing, continue to press until the machine turns off again. This is considered successful. You need to disconnect the power supply,
Banshee CBC
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3 Posts
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October 1st, 2024 21:01
Same here.. WE have approx 100 x Dell U3419 USB-C screen .. all the the latest available Firmware
And when we upgrade from our Dell 5550 / 60 .. to 5680 and 5690, the Dell Instantly stop after 1 min boot.. with no error message at all.
Bios updated, Drivers updated.. same behaviour.. in all 14 laptop we upgrade.
(edited)
precision_5680_usb_display_output_broken
1 Rookie
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2 Posts
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October 9th, 2024 11:24
I have the exact same problem on my Dell Precision 5680.
BIOS 1.13.0, the same problem under both Linux and Windows. Essentially, if you plug an external display into any of the USB-C ports, it can only output a display signal if the external device isn't also being powered from the laptop.
For example - plugging in an external monitor with just a USB-C cable will power the monitor on, but you won't get a display signal. As soon as you plug an external power source into the external monitor, the display signal will come through as expected.
The behaviour is almost as though the following setting in the BIOS is forced to "Off" irrespective of what you set it to:
Video/Power only on Type-C Port
"Limits Type-C port functionality to Video or Power only"
precision_5680_usb_display_output_broken
1 Rookie
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2 Posts
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October 10th, 2024 06:15
Just a correction on the previous post.
The behaviour is almost as though the following setting in the BIOS is forced to "on" irrespective of what you set it to (so for example, I have it turned off):
Video/Power only on Type-C Port
"Limits Type-C port functionality to Video or Power only"
MNdesigner
1 Rookie
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1 Message
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October 23rd, 2024 12:43
Hi,
I'm experiencing the same problem on my 5680. I have tried my external monitors on other laptops and they work fine. has anyone gotten any further on a fix for this issue?
MartinKunzmann
1 Rookie
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1 Message
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November 20th, 2024 10:35
Hi,
I have the same issue on my 5690. Any new updates?
KR
Martin
allenmtc
1 Rookie
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1 Message
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November 23rd, 2024 17:41
My 5690 USB C port failed while doing a USB driver update.
Apparently when the device reboot the USB was left in an unprotected state .
That USB port failed and dameged the monotor port, other ports still work..
Waiting for a motherboard replacement.