F5F Stay Refreshed Hardware Desktop This new PC is displaying a black screen and cannot access the BIOS.

This new PC is displaying a black screen and cannot access the BIOS.

This new PC is displaying a black screen and cannot access the BIOS.

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mjt2789
Senior Member
483
11-21-2025, 11:18 AM
#1
Hey everyone, I just completed the build from the link you shared. I connected the CPU, RAM, fan, and GPU to the motherboard, and everything is linked to the PSU. When I power on the PSU, the motherboard lights come on, but the fans and GPU fans don’t activate. The desktop is hooked up to the GPU and keyboard to the motherboard, but when I connect the HDMI to the GPU, the desktop shows an error saying no signal is detected. I looked online and tried removing the GPU and using just one cable for the CPU power supply on the motherboard, but that didn’t help. I also added another cable with four connections to the ATX12V1 for the CPU power, but there are only four slots. I noticed occasionally, even when the PSU is off, a white flash appears from the middle of the motherboard. I’m confused about its source—maybe it’s from the RGB lights that turn on when I power up. Do I need a USB connection with BIOS or something? Any advice would be greatly appreciated!
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mjt2789
11-21-2025, 11:18 AM #1

Hey everyone, I just completed the build from the link you shared. I connected the CPU, RAM, fan, and GPU to the motherboard, and everything is linked to the PSU. When I power on the PSU, the motherboard lights come on, but the fans and GPU fans don’t activate. The desktop is hooked up to the GPU and keyboard to the motherboard, but when I connect the HDMI to the GPU, the desktop shows an error saying no signal is detected. I looked online and tried removing the GPU and using just one cable for the CPU power supply on the motherboard, but that didn’t help. I also added another cable with four connections to the ATX12V1 for the CPU power, but there are only four slots. I noticed occasionally, even when the PSU is off, a white flash appears from the middle of the motherboard. I’m confused about its source—maybe it’s from the RGB lights that turn on when I power up. Do I need a USB connection with BIOS or something? Any advice would be greatly appreciated!

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squidthekidRC
Member
64
11-21-2025, 11:48 AM
#2
Activate the properly linked power switch. It’s not just about launching the PSU unless you’ve already got it running and adjusted some BIOS settings.
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squidthekidRC
11-21-2025, 11:48 AM #2

Activate the properly linked power switch. It’s not just about launching the PSU unless you’ve already got it running and adjusted some BIOS settings.

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FozMac
Member
97
11-21-2025, 06:59 PM
#3
When the system is active, the GPU displays a light indicating power status—white for on, red for off. You can connect a small flat screwdriver to the power button pins, though some motherboards include a dedicated power-on switch.
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FozMac
11-21-2025, 06:59 PM #3

When the system is active, the GPU displays a light indicating power status—white for on, red for off. You can connect a small flat screwdriver to the power button pins, though some motherboards include a dedicated power-on switch.

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callum12152
Junior Member
4
11-22-2025, 11:07 PM
#4
Hi @Jahee2, @Cyberat yesterday I attempted that step after notifying it's a real action. However, on the motherboard I can't locate the pwrsw button in the bottom right corner. I only saw a label called pwr btn and tried connecting the case connector power switch to pwrbtn on the board, but it didn't work. I've also tried pressing that button with a flat and star-shaped tool, but no luck. Sharing photos of the board @CyberAtlas @Cyberat I haven't seen any GPU light and after watching that video I think it likely doesn't have one, unless the indicator is just behind the dashboard panel on the top right at 1:59.
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callum12152
11-22-2025, 11:07 PM #4

Hi @Jahee2, @Cyberat yesterday I attempted that step after notifying it's a real action. However, on the motherboard I can't locate the pwrsw button in the bottom right corner. I only saw a label called pwr btn and tried connecting the case connector power switch to pwrbtn on the board, but it didn't work. I've also tried pressing that button with a flat and star-shaped tool, but no luck. Sharing photos of the board @CyberAtlas @Cyberat I haven't seen any GPU light and after watching that video I think it likely doesn't have one, unless the indicator is just behind the dashboard panel on the top right at 1:59.

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dianarose32129
Senior Member
570
11-23-2025, 03:08 AM
#5
Some pins are missing intentionally. The last two connectors have unclear labels. Without the manual, I assume SPK_PLED1 is Junction 1 and L6 is Junction 2. Junction 1: First two pins are power LED connectors beginning with "+", next two are HDD LED connectors starting with "+", the lower half serves internal speakers (uses two real pins). Junction 2: First two are power button connectors starting with "+", last two are reset button connectors starting with "+". I’ll try to match based on what I see. Just remember this is my best guess since I don’t have the schematic or manual. The MB has a cheap design—shorting can happen if you touch metal between the pins briefly.
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dianarose32129
11-23-2025, 03:08 AM #5

Some pins are missing intentionally. The last two connectors have unclear labels. Without the manual, I assume SPK_PLED1 is Junction 1 and L6 is Junction 2. Junction 1: First two pins are power LED connectors beginning with "+", next two are HDD LED connectors starting with "+", the lower half serves internal speakers (uses two real pins). Junction 2: First two are power button connectors starting with "+", last two are reset button connectors starting with "+". I’ll try to match based on what I see. Just remember this is my best guess since I don’t have the schematic or manual. The MB has a cheap design—shorting can happen if you touch metal between the pins briefly.

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Mikelinkfilhoo
Junior Member
49
11-25-2025, 11:42 AM
#6
The GPU light is located beside the GPU power plugin, and it becomes visible once activated.
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Mikelinkfilhoo
11-25-2025, 11:42 AM #6

The GPU light is located beside the GPU power plugin, and it becomes visible once activated.