メイン コンテンツに進む
  • すばやく簡単にご注文が可能
  • 注文内容の表示、配送状況をトラック
  • 会員限定の特典や割引のご利用
  • 製品リストの作成とアクセスが可能

Dell Computer Does Not Turn On or Boot Into Windows With Errors Such as No Bootable Device

概要: Is your Dell computer not turning on? Getting errors such as no bootable device? Learn how to identify the symptoms of power, POST, video, or boot-related problem on your Dell desktop, all-in-one, or laptop. Find links to common troubleshooting guides to help recover your Dell computer. ...

この記事は次に適用されます:   この記事は次には適用されません: 

現象

Every computer goes through a series of checks from the time that it is turned on until it boots into the operating system. When a computer does not turn on or boot into the operating system, it could be a failure with;

  • Power issue if your Dell desktop or laptop will not turn on
  • POST (power-on self-test) process issue if your Dell computer turns on but it is stuck at the Dell logo screen or stuck at a black or blank screen
  • Video issue if your Dell computer does not display anything on the monitor or screen
  • For On-screen error message such as No Boot Device, No Bootable Device, Boot Device Not Found, No bootable devices were found when booting to the operating system, go to the no boot section for links to articles to help resolve your issue.

The steps to troubleshoot each issue may vary depending on the type of symptoms that you are noticing on the computer.

NOTE: Having trouble with your Alienware? Learn how to troubleshoot if your Alienware Computer Does Not Turn On or Go Into Windows.

原因

  • A loosely connected power cable, or faulty power supply, ac adapter, power cable, power strip (surge protector) can cause power issues.
  • System memory (RAM) that is installed improperly, a faulty motherboard or a faulty device attached to the computer can stop the computer from completing the power on self-test (POST).
  • Your computer can stop booting to the operating system because of corrupt operating system files or drivers, bad sectors on the hard drive, faulty hard drive, and so on.
  • Display-related issues are often caused because of outdated or corrupt video drivers, incorrect display settings on the monitor or display, incorrect video settings in the operating system, or even a faulty display or video card.

解決方法

If your Dell computer does not turn on or boot into the operating system, it is recommended that you first perform a hard reset. Performing a hard reset fixes many problems and also drains residual power that may be causing the problem.

Perform a hard reset.

  1. Turn off the computer.
  2. Disconnect the AC adapter or power cable from the computer, and remove the battery (for Dell laptops with removable battery).
    NOTE: For Dell laptops that have a nonremovable battery, see the Dell knowledge base article How to reset Real Time Clock (RTC).
    For Dell laptops with removable batteries, see the documentation of your Dell laptop for step-by-step instructions to safely remove the battery.
    NOTE: On select Dell Latitude laptops, try to recover the laptop using the forced ePSA method from a POST or boot failure. To learn more, see the Dell knowledge base article How to Use Forced ePSA to Recover from POST or Boot Failure.
  3. Disconnect all devices such as USB drives, printers, webcams, and media cards (SD/xD).
  4. Press and hold the power button for 15 to 20 seconds to drain residual power.
  5. Connect the AC adapter or power cable and the battery (for Dell laptops).
  6. If your Dell computer can turn on but is unable to boot into Windows, identify the symptoms and follow the appropriate troubleshooting guide.
  7. If your Dell computer is not able to turn on, follow the troubleshooting guide for no power symptom in the table below.

Run a hardware diagnostic test.

Running a hardware diagnostic test helps you identify potential hardware failure. Dell laptops, desktops, all-in-ones, and Windows-based tablets have an integrated diagnostic test. It is called the SupportAssist Pre Boot System Assessment or Enhanced Pre-Boot System Assessment (ePSA).

NOTE: If the diagnostic test fails, make a note of the error code and validation code that the diagnostic test provides. This helps Dell Technical Support to identify which hardware component is causing the issue and provide repair options.

Identify the symptoms and troubleshoot

No Power

When you press the power button, the Dell computer does not turn on. There is no indication of the computer turning on (all the LEDs are off).

  • Dell computer shows no signs of power.
  • Power LED is off and does not respond when you try to turn on the computer.
  • The display is blank or black, the computer does not start, and there is no indication of turn on the computer.
  • No fan noise is heard.

Try these quick steps to recover your Dell computer from a power issue.

Resolving No Power Issues

Duration: 00:34
When available, closed caption (subtitles) language settings can be chosen using the Settings or CC icon on this video player.


Resolving Battery Issues

Duration: 00:23
When available, closed caption (subtitles) language settings can be chosen using the Settings or CC icon on this video player.


No POST

When you press the power button, the power LED, CAPS lock, Scroll lock, and Num lock LEDs are blinking in a pattern. The computer may also emit beep codes that help identify errors on a specific hardware component.

  • LEDs blinking (usually in a pattern and/or amber in color).
  • Beep codes are heard on the computer (continuous or pattern).
  • The display is blank (black) with blinking LEDs or beep codes.
  • Fan noise is heard, but LEDs are blinking, or beep codes are heard.
  • The computer stops responding or is stuck at the Dell logo.
  • The LEDs do not respond when you press the Caps lock, Scroll lock, or Num lock keys.

Try these quick steps to recover your computer from a POST or startup issue.

Resolving No Post Issues

Duration: 00:25
When available, closed caption (subtitles) language settings can be chosen using the Settings or CC icon on this video player.


No Boot

When you press the power button, the computer turns on and completes the POST process. It does display an error message or fails to boot into the operating system.

  • The status of LEDs (power LED, hard drive activity LED, and so on) is normal.
  • Fan noise is heard.
  • Blank or black screen with a blinking cursor on the top-left corner of the screen.
  • Hard drive-related error messages such as 'No Boot Device,' 'No Bootable Device,' or 'Boot Device Not Found,' or 'No bootable devices were found.'
  • Windows blue screen or STOP (Crash Screen) error messages.
  • The computer stops responding or stops at the Windows logo screen while booting into the operating system.

Try these quick steps to recover your computer from a boot problem.

Resolving No Boot Issues

Duration: 00:37
When available, closed caption (subtitles) language settings can be chosen using the Settings or CC icon on this video player.


No Video

When you press the power button, the power LED, and other LED status are normal. But, the computer still has a blank or black screen. This indicates a video or display issue on the computer.

  • The status of LEDs (power LED, hard drive activity LED, and so on.), are normal.
  • Fan noise is heard, but the display is blank (black).
  • The display is blank or black.
  • Blurry, distorted, fuzzy images.
  • Horizontal or vertical lines.
  • Color fade, light leak, brightness, contrast issues, and so on.

Try these quick steps to resolve video issues on a Dell computer.

その他の情報

Recommended Articles

Here are some recommended articles for you.


Out of Warranty support Out of warranty? No problem. Browse to the Dell.com/support website and enter your Dell Service Tag and view our offers.

NOTE: Offers are only available for US, Canada, UK, France, Germany, China, and Japan personal computer customers. Server and Storage not applicable.

対象製品

Chromebox, Alienware, Inspiron, Legacy Desktop Models, OptiPlex, Vostro, XPS, G Series, Chromebook, G Series, Alienware, Inspiron, Latitude, Vostro, XPS, Legacy Laptop Models, Fixed Workstations, Mobile Workstations
文書のプロパティ
文書番号: 000130881
文書の種類: Solution
最終更新: 29 8月 2024
バージョン:  35
質問に対する他のDellユーザーからの回答を見つける
サポート サービス
お使いのデバイスがサポート サービスの対象かどうかを確認してください。