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Area-51 R2, U4919DW, no BIOS splash screen

No BIOS splash screen when connected to Dell U4919DW with Alienware Area-51 R2 PC

Bios Splash screen available when another monitor connected (not ultra wide).

No other issues with Dell U4919DW.

(NVIDIA GeForce GTX 1080) DP ----à   (Cable  H8RPH-HTN1-02K) ----à DP (Dell U4919DW) 

Windows 10 Professional (x64) Version 1909 (build 18363.815)
Install Language: English (United States)
System Locale: English (United States)
Installed: 5/05/2020 9:08:16 AM
Servicing Branch: Current Branch (CB)
Boot Mode: UEFI with successful Secure Boot

System Model

NVIDIA GeForce GTX 1080 [Display adapter]

Alienware Area-51 R2

3.00 gigahertz Intel Core i7-6950X
640 kilobyte primary memory cache
2560 kilobyte secondary memory cache
25600 kilobyte tertiary memory cache
64-bit ready
Multi-core (10 total)
Hyper-threaded (20 total)

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4 Beryllium

Re: Area-51 R2, U4919DW, no BIOS splash screen

Do you mean no video on ultra wide screen monitor, but when you switch monitor to non ultra wide one, you get normal Windows video on screen?  If yes the issue is not No POST, but No video display on new monitor. Try connecting via hdmi cable for a test.

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