Question I need expert help with DisplayPort issue after power outage ?

[WickedFnatic]

Hello Everyone,

I'm a new member here, and I have encountered a frustrating problem with my computer that I hope you can help me with. I was working on my PC during a recent thunderstorm when a minor power outage occurred. It was brief and didn't even cause my desktop to shut down; just the monitor blinked off for a second. However, after this incident, my DisplayPort seems to have stopped working.

Currently, I can still use HDMI, but not DisplayPort. This has stuck me at a 50Hz refresh rate, which could be better, especially for gaming and graphics work. Besides this issue, everything else is working fine. There are no other noticeable issues with gaming or general PC use.

Here are the specs of my computer:
CPU: Intel i9 13900K
CPU Cooler: EKWB EK-Quantum Velocity 2 CPU Water Block + EK-Quantum Kinetic TBE 160 DDC PWM (it's a full custom water-cool loop)
Motherboard: ASUS ProArt Z690-Creator WiFi
RAM: G.SKILL Trident Z5 RGB 64GB DDR5
SSD/HDD: 4 x Samsung - 980 PRO 2TB SSD PCIe Gen 4 x4 NVMe
GPU: Nvidia RTX 3080 Founders Edition
PSU: EVGA SuperNOVA 850 P2, 80+ PLATINUM 850W
Chassis: Phanteks Enthoo Evolv X
OS: Windows 11
Monitor: Acer Predator x34

I'd like to add that the PSU and Monitor are the oldest part of this build, dating back to March 2016.

I've attempted to rectify this problem by clearing the CMOS, changing the DisplayPort Cable, and even trying out every DisplayPort port on my GPU. Unfortunately, none of these steps seemed to solve the issue.

At this juncture, I would like to know if the problem is with a broken DisplayPort controller on the GPU. Alternatively, I am also considering if it may be time to replace the PSU and/or the GPU. Before making any decisions, however, I would appreciate your advice and input on this matter.

Looking forward to hearing your expert opinions.
I really appreciate any help you can provide.

 

[WickedFnatic]

Update on the DisplayPort issue that I previously described.

To resolve it, I purchased an HDMI 2.1 to DP 1.4 adapter cable capable of converting the signal up to 8K/30Hz, 4K/120Hz, and 2K/144Hz. However, to my disappointment, I still couldn't get any signal. The fact that my GPU was outputting an HDMI signal made me turn my attention to the monitor.

This monitor can only go up to 100Hz when overclocked, and I suspected that might have been a contributing factor. The brief power outage may have caused some settings to go awry, resulting in the issue. I first tried disconnecting the monitor from the power outlet and power-cycle it like a desktop. I waited for around 15 seconds before powering it back on. The monitor still didn't display any signal, prompting me to go to the monitor settings and reset it, restoring all settings to factory defaults.

After doing so, I finally got a signal. I overclocked the monitor to 100Hz, and now everything works as it should.

Although I didn't receive a response to my original post, I wanted to share this update in case it proves helpful to someone else in the future. What initially seemed like a major issue was a tiny oversight (not checking the monitor settings), which led to a great deal of stress and almost $2000 spent on a new 4090 GPU and water block.

Always check all possible sources of an issue before jumping to expensive conclusions!