Cameron's Blog

How-to: Upgrade the CPU of a Compaq CQ62

I’ve wanted to document all the steps I went through when upgrading my notebook’s CPU and finally made a Blog where I could do it!

But before we continue, some background information and some precautions are in order:

Useful Resources

HP Compaq CQ62-A20SB Materials:

Thermal Paste:


I take no responsibility whatsoever for any damages caused by following this guide. I only intent to document the steps and will provide warnings where necessary, but if you choose to follow this guide, proceed at your own risk.


To prevent any damages to the hardware due to static electricity I took the following precautions:

  • Anti-static wristband
  • No carpet at the workplace

Other things you will need

  • Philips screwdriver
  • Flat-bed screwdriver
  • Thermal paste & cleaner
  • Something to put the screws in (preferably seperated so you can tell which are which)

Some remarks about the manual

All the steps are described pretty well in the manual except for the following:

Optical drive bay

  • You first need to remove a screw before you can continue to push out as per manual’s instructions

LCD Display

  • Unplugging the connectors of the display is sufficient for reaching the CPU


  • The keyboard is attached with little glue pads that need some force before they come loose

Top Cover

  • This also requires some force to come loose

Getting Started

Step 1: Prepare the notebook & removing the battery

  • Shut down the notebook (no hibernation/sleep)
  • Unplug the power adaptor
  • Remove the battery
    • Push the slider sidewars
    • Pull out the battery
  • Press the power button to discharge any electricty left in the circuit

Battery removed

Step 2: Remove the WLAN/ HDD cover plates

Unscrew the two cover plates which are both attached with 2 screws each

Step 3: Remove the HDD

Pull out the HDD bay and disconnect the SATA connector

Cover plates and HDD removed

Step 4: Remove the RAM modules

Ram modules

  • Loosen the clips
  • Pull out the RAM modules at an angle

Step 5: Remove the WLAN module

  • Unplug the main and auxiliary antenna
  • Remove the screw
  • Pull the WLAN module out at an angle

Step 6: Remove the RTC Battery

  • Unplug the connector
  • Remove the RTC battery which is attached with an adhesive strip to the bottom of the case

WLAN/RAM/RTC Battery removed

Step 7: Remove the Optical Drive Bay

  • Remove the screw above where the RTC Battery used to be
  • Push the pin in the hole(the one that has an arrow pointing at it) with a small screwdriver

Step 8: Remove the Keyboard

Remove 6 screws marked with a keyboard icon spread over the bottom of the case

  • 3 of the screws are inside the battery compartment

Turn the notebook around (upside up)

  • Unhinge the keyboard (you can push it out through the bottom of the notebook case)
  • Carefully pull up the top of keyboard so the adhesive strips come loose (mind to not pull to much on the connector)
  • Unlock the ZIF (Zero Insertion Force – they mean it) connector
  • Pull out the keyboard

Keyboard disconnected

Step 9: Remove the Top Cover

Caution! The weight of the notebook has diminished enough to make the LCD the heaviest part and it is no longer in a balanced position when placed on a desk. Make sure to support the LCD when proceeding. Or, if possible, rest the notebook on the back of the LCD when removing the cover.

  • Turn the notebook back around (upside down)
  • Remove 4 + 9 + 3 screws, all marked with a triangle
    • 4 screws are inside the battery compartment
    • 9 screws are spread across the bottom of the notebook (mostly around the edge)
    • Turn the notebook around (upside up)
    • Remove 3 more screws in the keyboard compartment
  • Remove all the connectors visible in the keyboard compartment
    • 1 at the top left (power connector)
    • 1 at the bottom left (connecting the speakers)
    • 2 in the middle (touch pad and touch pad buttons)
  • Support the display
  • Lift the rearside of the top cover
    • Quite a lot of force is needed to unhook the clips, primarily around the display hinges
    • Pull out the top cover at an angle towards the display. Make sure to support the LCD because of the shift in weight

The top cover

Step 10: Remove the System Board

Top cover removed

After having removed the top cover you can finally see the system board.

Over on the left:

Speaker and display cables

  • Remove the speaker connector (middle left)
  • Remove the display connector (top left)
  • Unroute these 2 cables (Mind the adhesive strips)

Speaker and display cables disconnected

Over at the right:

  • Unroute the WLAN cables
  • Disconnect the USB ZIF connector
  • Disconnect the power cable

USB cable disconnected

Power cable disconnected

At the front (closest to you):

  • Disconnect that other random connector

Mysterious connector


  • Remove 4 more screws holding the system board in place (1 is hidden over at the fan)
  • Pull out the board at an angle towards the right side of the notebook (the system board swivels on the left side where all the external connectors are normally located)

The hidden motherboard screw

Step 11: Remove the Heatsink

The system board

We’re in the danger zone people…

The heatsink

  • Disconnect the cooling fan cable on the system board ( And make a mental note TO PUT IT BACK LATER )
  • Loosen the 4 screws pressing the heatsink down on the CPU in the correct order (Check the manual for the correct ordering)
  • Pull the heatsink up

Step 12: Remove the CPU

The CPU is held in place with a locking screw. Turn it counter clockwise half a turn.


You can now remove the CPU but be careful not to bend the pins while doing so. Alse, note how it was oriented in the socket (There is a mark on one of the corners, a triangle, that identifies how it should be fitted)

Step 13: Prepare the replacement CPU and the Heatsink

If it was a second hand CPU, clean it first to remove the thermal paste. Do the same to the relevant parts of the heatsink.

Make sure to check if there are other components making use of the Heatsink. For instance, a GPU, that might also need cleaning and new thermal paste.

Now apply the thermal paste as per your preferred method.

Step 14: Installing the CPU

Place the CPU in the socket in the same orientation as it originally was in. If placed correctly, it will fall in almost by itself. Do not use any force as that may bend a pin. As said before, if placed correctly it will not need force to fit.

Lock in the cpu with the locking screw and fasten it by turning it half a turn clockwise.

Step 15: Installing the Heatsink

Caution! Make sure the cooling fan’s connector is out of the way so it doesn’t get locked in between the heatsink and the system board when fitting the heatsink.

  • Put the heatsink in place
  • Connect the cooling fan cable
  • Fasten the screws in reverse order pressing the heatsink against the CPU.

Reassembling the notebook

Just reverse all the instructions going from step 10 back to 2.