Green and purple BIOS post

[mylokgl]

I just got my AMD Omen 16L all setup with an older 32" HDMI tv for the display. Yes, its not up to date HDMI. I did get a newer cable for it and so far its working better than the old one. no green applications. I plugged in the newer cable and even a dated legitimate PC monitor to my OMEN and we fixed the green and pink display all together. Im using the stock GPU that came with this PC currently and ill be upgrading GPU and the PSU maybe I can still use my 32" tv without any issue after the upgrades. So conclusion is this PC doesn't like inappropriate out of date HDMI given the age differences. hope this helps

[Kuroi_Kenshi · Accepted solution]

Hi @mylokgl,

Welcome to the HP Support Community!

Thanks for reaching out!

We're thrilled to have the opportunity to assist you and provide a solution.

I understand your OMEN 16L desktop was showing green and purple colors during BIOS POST when connected to an older HDMI TV. Let’s go through a few steps to explain what caused this and how to prevent it.

Check the display and cable compatibility
Older TVs often use early HDMI standards that may not fully support newer GPUs and BIOS output.
This can cause color distortion during startup or POST.

Replace the HDMI cable
Using a newer, high-quality HDMI cable improves signal integrity.
This often resolves color issues caused by bandwidth or handshake limitations.

Test with a standard PC monitor
Connecting a modern PC monitor helps confirm whether the issue is the TV or the PC.
If the colors display correctly on a monitor, the TV is the limiting factor.

Verify GPU output settings
Stock GPUs are optimized for modern displays and standards.
Older displays may misinterpret the signal during low-resolution BIOS output.

Update BIOS and graphics drivers
Keeping the BIOS and GPU drivers updated ensures better display compatibility.
Updates can improve how the system handles legacy displays.

Consider display compatibility after upgrades
Upgrading the GPU and PSU may further increase HDMI version requirements.
Older TVs may still work, but compatibility is not guaranteed during boot or BIOS screens.

Use the recommended display connection
Whenever possible, use a modern monitor or a TV that supports newer HDMI standards.
This avoids signal mismatches during startup and normal use.

I hope this helps.

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Best regards,