Press the power button and wait for the startup sequence

The power button on an HP computer is almost always a physical button you press once. On a desktop tower, it is typically on the front panel, either near the top or bottom. On an HP laptop, the power button is usually in the top-right or top-left corner of the keyboard, or along the edge of the chassis. Press it once firmly and release — you do not need to hold it down.

After you press the button, the computer will take 30 seconds to several minutes to fully start. You will see lights turn on, hear the fan spin up, and watch the screen come to life. During this time, the computer is loading its operating system (Windows, most likely) and preparing all its programs to run. Let it finish this process without pressing anything else.

If nothing happens after 10 seconds, check that the computer is plugged into power. On a desktop, also check that the power strip or surge protector is switched on. On a laptop, the battery may be completely drained — plug it in and wait a few minutes before trying again.

Key Takeaways

  • The power button is a single physical button on the front of a desktop tower or along the edge of an HP laptop keyboard.
  • Press the button once and release; do not hold it down or press it repeatedly.
  • The startup process takes 30 seconds to several minutes, and you should not interrupt it.
  • If the computer does not respond, verify that it is plugged into a working power outlet or power strip.
  • On a laptop with a dead battery, plug in the charger and wait a few minutes before pressing the power button.

What to expect during startup on Windows

When an HP computer running Windows starts up, you will see the HP or Windows logo appear on the screen. The screen may go black for a few seconds — this is normal. You may also hear the hard drive or solid-state drive working (a clicking or whirring sound). The fan will run, sometimes loudly, as the system cools itself during startup.

After the logo disappears, Windows will load. You may see a spinning circle or a progress bar. This can take anywhere from 30 seconds on a newer computer to two or three minutes on an older one. Once Windows has fully loaded, you will see the login screen (if your computer has a password) or the desktop (if it does not).

Logging in after startup

If your HP computer asks for a password when it starts up, type your password and press Enter. If you have forgotten your password, you can try your Microsoft account password if the computer is linked to one. If that does not work, you will need to use Windows password recovery tools, which requires access to another computer or a recovery drive.

If your computer does not ask for a password, you will go straight to the desktop. The desktop is the main screen where your icons, taskbar, and programs live. From here, you can open any program by clicking on it.

Troubleshooting if the computer will not turn on

If you press the power button and nothing happens at all — no lights, no sound, no screen activity — the problem is almost always power. Check that the power cable is firmly plugged into both the computer and the wall outlet. If you are using a power strip or surge protector, make sure it is switched on. Try plugging a lamp or phone charger into the same outlet to confirm the outlet itself works.

On a laptop, a completely dead battery can prevent startup. Plug the charger in, wait at least 15 minutes, and then press the power button. The charging light (usually amber or blue) should come on when you plug in the charger, even if the screen does not light up when ready.

If the computer has power but the screen stays black, the monitor or display cable may be disconnected. On a desktop, check that the monitor cable is plugged into the back of the tower and into the monitor itself. On a laptop, the display is built in, so a black screen usually means the computer is running but the display is off — try pressing the brightness keys (usually Fn plus an arrow key with a sun symbol) to turn the display back on.

Restarting a computer that is already on

If your HP computer is already running and you want to restart it, click the Start button (the Windows logo in the bottom-left corner on most HP computers). Then click the power icon and select "Restart." The computer will close all open programs and start the startup sequence again.

If the computer is frozen and will not respond to clicks, you can force a restart by holding down the power button for 10 to 15 seconds until the screen goes black. Wait a few seconds, then press the power button once to start up normally. This is harder on the computer than a normal restart, so use it only when the computer is not responding.

Putting the computer to sleep instead of turning it off

You do not have to turn off your HP computer completely every time you step away. You can put it to sleep, which uses much less power but lets you resume exactly where you left off. To put the computer to sleep, click the Start button, then the power icon, and select "Sleep." The screen will go dark and the computer will use minimal power.

To wake the computer from sleep, press any key on the keyboard or move the mouse. The computer will return to the login screen or desktop in a few seconds, much faster than a full startup. Sleep is useful if you are stepping away for an hour or two but plan to come back to the same work.

Frequently Asked Questions

Why does my HP computer take so long to start up?

Startup time depends on the age of the computer and how many programs are set to run automatically when Windows loads. Newer computers with solid-state drives typically start in 30 to 60 seconds. Older computers with traditional hard drives can take two to three minutes. If your computer has become slower over time, it may have too many startup programs — you can disable these in the Task Manager, but this requires some technical knowledge.

Is it bad to turn off an HP computer by holding the power button?

Holding the power button forces the computer to shut down when ready without closing programs or saving files. This can cause data loss and may damage the hard drive or file system. Use it only when the computer is completely frozen and will not respond to normal shutdown. For everyday shutdowns, use the Start menu and select "Shut down."

Can I turn on my HP laptop without pressing the power button?

Most HP laptops can only be turned on by pressing the physical power button. Some business-class HP laptops have a feature called "Wake on LAN" that lets them start when they receive a network signal, but this must be enabled in the BIOS settings first. For standard HP laptops and desktops, the power button is the only way to start.

What should I do if my HP computer turns on but the screen stays black?

First, check that the monitor is turned on and plugged in (on a desktop). Try pressing the brightness keys to make sure the display is not just dimmed. If you hear the computer running but see nothing on screen, the graphics card or display cable may have a problem. On a laptop, try pressing Fn and the brightness key with a sun symbol. If the screen remains black after these steps, the computer may need professional repair.