System starts but immediately switches off.

[Kbisht]

When i press power button the system starts with minimal sound of fan in the background. No display no keyboard lights active. Immediately within seconds the background sound stops and system is off with a slight beep sound on its own.

But i when i press power button on ac power supply the system runs same (slight fan sound in background, no display, no lights) but it doesn't switch off on its own now.

[Riddle_Decipher]

@Kbisht here's what you need to do:

If Windows suddenly restarts without warning, or restarts when you try to shut it down, it might be caused by one of several issues. Windows could be set to restart automatically when certain system errors occur. A BIOS update can also resolve the issue. Use the information in this document to resolve issues with the computer restarting unexpectedly.

If the computer restarts unexpectedly and then does not start to Windows, see one of the following documents for steps to resolve this issue:

• HP Guided Solution - No Power or No Boot Troubleshooting for notebook or desktop computers.

• Computer Does Not Start for notebook computers.

In addition to the steps in this article, updating video card drivers is known to resolve many of the problems that can cause the computer to restart.

Windows restarts for no apparent reason

Follow the steps in this section, in order, until the problem is resolved.

Step 1: Disabling the automatic restart option to view error messages

Many hardware driver or operating system errors will cause the computer to display a specific error message before stopping the operation or shutting down the computer. However, if the Automatically restart option is enabled, an error message might not be displayed despite an error taking place. Disable this option to allow the computer to display the error message.

Follow these steps to disable the Automatically restart option:

1. In Windows, search for and open View advanced system settings.

2. Click Settings in the Startup and Recovery section.

CLICK HERE FOR MORE STEPS AND INSTRUCTIONS.

(By the end of this article all the issues should be resolved)

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