Unsolved
1 Rookie
•
3 Posts
0
39
December 5th, 2025 12:26
U3223QE, no connection
<Started your own thread. DELL-Admin>
My screen just got the same problem since yesterday. As an electrical engineer, I know that this is Dell's fault and I am very frustrated. The problem comes conveniently right after the warranty expires and there is no method to troubleshoot it. I bought the screen directly from Dell, not a third-party seller.
DELL-ChrisM2
Community Manager
•
698 Posts
0
December 5th, 2025 12:30
Does the no video cables connected Self-Test and Built-in Diagnostics pass or fail?
U3223QE User's Guide pages 88/89.
user_f9be6e
1 Rookie
•
3 Posts
0
December 5th, 2025 12:35
The main display panel can't even turned on. There is no text or backlights at all, just pure black.
The only thing working is the while power LED near the power button.
DELL-ChrisM2
Community Manager
•
698 Posts
0
December 5th, 2025 12:44
* Disconnect every cable and USB device from the monitor
* Press and hold in the rear power button for 8 seconds
* Reconnect only the power cable and turn it on. Does the Self-Test no cable floating dialog box appear?
user_f9be6e
1 Rookie
•
3 Posts
0
December 5th, 2025 12:49
Yes, already tried without any cables. Even plugging out power, waited 5 mn, plug in back, power button hold for 8 secs. Nothing works.
DELL-ChrisM2
Community Manager
•
698 Posts
0
December 5th, 2025 12:53
Then some internal component has failed. Dell cannot know which component because Dell does not repair monitors. We only exchange them while still under the purchased warranty period.
user_f9be6e
1 Rookie
•
3 Posts
0
December 5th, 2025 12:55
Clearly, the display panel or the circuit driving it fails. We already had a Dell screen with the same symptoms in the past.
I will tell my employer to never buy Dell's equipments again. Other LG monitors in the office never have a problem.