How do i keep the back light on with out it timing out after few minutes

[Kirkwhat]

I have a HP ENVY 

[Dragon-Fur]

@Kirkwhat 

At this writing:

The option is not available on your computer.

What?

BIOS – Backlit Keyboard and other Advanced Options

This is one of those situations where the how-to document mentions that a particular feature might not be supported on every computer.  The document does not offer an exact explanation for you because the document is not written for YOUR computer.

HP Notebook PCs - Using the Backlit Keyboard

Section: The backlight stays on for only a few seconds

Discussion

In general, and there might be exceptions,

• Business class computers offer the BIOS Advanced section. 
• Examples of business class systems include and are not limited to:  Zbook Mobile Workstations, ProBook, Elitebook, and others.
• The backlit keyboard timeout option is included in the Advanced section as appropriate (system has a backlit keyboard).

• At this writing, consumer class systems do not include the backlit keyboard timeout feature.
• Examples of consumer grade systems include and are not limited to:  Spectre, Pavilion, Envy

HP Note

BIOS configurations vary depending on the computer. For further information on a specific computer, refer to the documentation provided with the computer or go to the appropriate document for your PC.

Consumer Class Desktops and Notebooks – BIOS Setup

• HP Desktop PCs - BIOS Setup Utility Information and Menu Options
• HP Notebook PCs - BIOS Setup Information and Menu Options

Commercial / Business Class Computers – BIOS Setup

HP PC Commercial BIOS (UEFI) Setup - Administration Guide

Reference and Resources – Places to find (more) help and learn about your Device

Clarification of terms and "what the device can do" (Specifications)

Device Homepage

NOTE:  Content depends on device type and Operating System

HP Drivers / Software and BIOS, How-to Videos, Bulletins/Notices, How-to Documents, Troubleshooting, User Guides, Product Information, more

Open Support Home

Enter the name of your device

When the website support page opens, Select (as available) a Category > Topic > Subtopic

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