HP 311, DM1 RTC battery

		Removal and replacement procedures

RTC battery

	Description	Spare part number

	RTC battery	580055-001

Before removing the RTC battery, follow these steps:

1.Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.

2.Disconnect all external devices connected to the computer.

3.Disconnect the power from the computer by first unplugging the power cord from the AC outlet, and then unplugging the AC adapter from the computer.

4.Remove the battery (see “Battery” on page 4-7).

5.Remove the accessory compartment cover (see “WLAN module” on page 4-9).

Remove the RTC battery:

1.Position the computer with the front toward you.

2.Disconnect the RTC battery cable 1 from the system board.

3.Slide the RTC battery 2 directly back to remove it.

Reverse this procedure to install the RTC battery.

Maintenance and Service Guide

4–15

Contents

HP Pavilion dm1 HP Mini Compaq Mini Page Page Safety warning notice 1Product description 2External component identification 3 Illustrated parts catalog 4 Removal and replacement procedures 5 Setup Utility 6 Specifications 7 Screw listing 8 Backup and recovery 9 Connector pin assignments 10Power cord set requirements 11Recycling Index Page Product description Page Page Page Page Page External component identification Wireless antennas Buttons Keys Lights Pointing devices Page Page Page Page Illustrated parts catalog Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Removal and replacement procedures Plastic parts Cables and connectors Drive handling Electrostatic discharge damage Packaging and transporting guidelines Workstation guidelines Equipment guidelines This chapter provides removal and replacement procedures Service tag Computer feet Battery SIM WLAN module Page Before removing the WLAN module, follow these steps: Remove the WLAN module: 1.Position the computer with the front toward you Loosen the 2 Phillips PM2.0×6.0 captive screws Lift the left side of the cover Page WWAN module Before removing the WWAN module, follow these steps: 5.Remove the accessory compartment cover (see “WLAN module” on page 4-9) Remove the WWAN module: 2.Disconnect the WWAN antenna cables 1 from the terminals on the WWAN module Page RTC battery Expansion memory module Before removing the expansion memory module, follow these steps: Remove the expansion memory module: 1024-MB Pull away the retention clips Reverse this procedure to install an expansion memory module Hard drive Before removing the hard drive, follow these steps: Remove the hard drive: 2.Disconnect the hard drive connector 3.Grasp the Mylar tab 2 in the hard drive bay, and then lift it up at an angle 4. Remove the hard drive 3 from the hard drive bay Page Keyboard ✎The keyboard spare part kit includes a keyboard cable Page Page Top cover Before removing the top cover, follow these steps: 7.Remove the keyboard (see “Keyboard” on page 4-21) Remove the top cover: 1.Turn the computer upside down, with the front toward you Page Page Wireless button board Power button board Speakers Digital media assembly Display assembly DescriptionSpare part number Before removing the display assembly, follow these steps: Disconnect the wireless antenna cables from the WLAN module (see “WWAN module” on page Page Remove the 4 Phillips PM2.0×7.0 screws 6.Lift the display assembly 2 straight up and remove it a.Remove the hinge covers Flex the inside edges of the top edge c.Remove the display bezel Page Page Page Multi board Before removing the multi board, follow these steps: 5.Remove the following components: a.Accessory compartment cover (see “WLAN module” on page 4-9) b.Hard drive (see “Hard drive” on page 4-18) System board Before removing the system board, follow these steps: ■SIM (see “SIM” on page 4-8) ■WLAN module (see “WLAN module” on page 4-9) ■RTC battery (see “RTC battery” on page 4-15) Page Page Power connector Fan Heat sink assembly Page Page Page Setup Utility Displaying system information Main Exit > Exit Discarding Changes Restoring factory settings in Setup Utility Exit > Load Setup Defaults The menu tables in this section provide an overview of Setup Utility options Main menu Security menu Diagnostics menu System Configuration menu Specifications Page Page Page Page Page Page Page Page Page Screw listing Where used: Page Page Page Where used: 2 screws that secure the multi board to the base enclosure Page Page Page Page Page Page Where used: 2 screws that secure the top cover to the base enclosure Page Backup and recovery Creating recovery discs Note the following guidelines before creating recovery discs: You will need ■The computer must be connected to AC power during this process ■Only one set of recovery discs can be created per computer Using Windows Backup and Restore Using system restore points When to create restore points Create a system restore point Restore to a previous date or time Recovering from the recovery discs Recovering from the dedicated recovery partition (select models only) 1.Select Start > All Programs > Accessories > System Tools > Backup Recovering your information Recovering the operating system and programs Page Connector pin assignments Page Page Page Power cord set requirements Page Recycling Page Page Page 16.Turn the display panel upside down 17.Remove the backlight frame from the display panel 18. Remove the backlight from the backlight frame Page Index