PC won't turn on

[Scott_G68]

I went away for 3 days and shut my PC down when I left. I came back and now it won't turn on again. I checked the power cable and it works. I unplugged everything, pressed the power button for 30sec and plugged in the power cable again. Pressed the power button and nothing happens.

[Max3Aj]

Hi @Scott_G68,

Welcome to HP Support Community.

Thank you for posting your query, I will be glad to help you.

Since your HP ENVY Desktop PC won’t turn on after being shut down for a few days, here are some troubleshooting steps to help diagnose and fix the issue.
 

Check Power Supply & Connections

Confirm Power Source

• Try plugging the desktop into a different power outlet.
• If using a power strip, plug it directly into a wall outlet to rule out a faulty strip.

Test Power Cable

• If you have another compatible power cable (like from a monitor or another PC), try swapping it.

Check the Power Supply Unit (PSU) Light

• Some HP desktops have an LED on the back near the power cable connection.
• If there’s a light and it’s OFF, the PSU might be faulty.
• If it’s ON but the PC still won’t power up, proceed with further steps.

Perform a Hard Reset

1. Unplug the power cable from the desktop.
2. Hold the power button for 30-60 seconds to drain residual power.
3. Plug the power cable back in and try turning it on.

Check for Internal Power Indicators

If the PSU has a built-in test button, press it and see if the fan inside the PSU spins.

• If the fan doesn’t spin, the PSU may be faulty.
• If the fan does spin but the PC won’t start, the issue may be with the motherboard.

Open the case (if comfortable) and check for LED lights on the motherboard.

• No lights? The PSU may have failed.
• If lights are on but no response from the power button, the power button or motherboard may be the issue.

Reseat Components

1. Remove and reinsert the RAM sticks firmly.
2. Reseat the graphics card (if applicable).
3. Check that the CPU power cable is securely connected.

Breadboarding (Isolate the Issue)

• If you're comfortable, try disconnecting all peripherals and unnecessary components (GPU, extra RAM, SSD/HDD) and turn the PC on using only the motherboard, CPU, and power supply.

I hope this helps.

Take care and have a good day.

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Max3Aj

HP Support