My new computer won't turn on

There are several reasons a new computer may not power on right out of the box. Luckily many of the possible causes are easy to resolve.

First, make sure the master power switch on your PC's power supply is  flipped to the On position. See below:

Next, if your computer still isn't booting up when you press the power button on the front of the system, it could be related to a surge protector or UPS. Having a UPS or surge protector that cannot provide the proper amount of power to the system when it's under load or idle would cause most to experience uncommon stability issues with their systems, and in some cases prevent the systems from booting up at all. The solution would be to bypass these, and plug the system directly in to a wall outlet. You can do this temporarily to see if it resolves the issue.

If that doesn't work and your system appears to be getting no power when you press the power button (no fans or lights turn on), you may need to discharge your power supply. To do this, simply unplug your computer from power and press the power button 10 to 15 times in a row. Once you've done this, plug your computer back into an outlet and attempt to power it on normally. 

If your system still isn't booting, check to see if any lights or fans are turning on inside your computer when you press the power button. If so, you may just not be getting video on your monitor. Check your monitor cable connection, and ensure your monitor is set to the correct input. Also, on MAINGEAR computers with dedicated graphics cards, check to make sure your monitor is plugged into the graphics card, and not the video outputs on the motherboard (these are disabled on systems with dedicated graphics cards). See below:

If you are still unable to boot your system, please contact a MAINGEAR Support technician who can assist you further: 1-888-MAINGEAR (908-620-9050) or

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