How to Replace an Ashton Digital Maximate 420 CMOS Battery

If your Ashton Digital Maximate 420 won't boot up, isn't booting up properly or isn't properly tracking the time and date between sessions, it might have a dead CMOS battery. Replacing this battery isn't as easy as replacing the primary power source, which simply clips onto the outside of the computer case, but it isn't too complicated a process, either. You'll only need a screwdriver and a replacement battery for this quick fix-it project.

Difficulty: Moderate

Instructions

Things You'll Need:

• Replacement CMOS battery
• Phillips-head screwdriver

1. Turn off the computer, unplug the power cord and remove the external battery. Press the power button again to discharge any stored power that might be present.

2. Close the lid and flip the computer over on its top. You should be able to see six screws spread throughout the bottom panel of the laptop. Remove all of these screws with a small Phillips-head screwdriver, setting them aside in a safe place.

3. Lift the bottom panel off the laptop and set it aside, then turn the laptop over.

4. Open the lid of the laptop and remove the top panel and keyboard, which will lift right off now that the screws have been removed.

5. 
    

   Find the existing CMOS battery. It will be small, round, flat and housed inside a synthetic sleeve, just like the one shown here. Unplug it from the motherboard.

6. Plug in the replacement CMOS battery. Make sure you use a replacement that is designated as compatible with the Ashton Digital Maximate 420.

7. Lay the keyboard back in its original position, then lay the top panel of the keyboard on top of it. Close the lid.

8. Turn the laptop over and replace the bottom panel. Put back all of the small screws, using the screwdriver.

Tips & Warnings

• Opening your Ashton Digital laptop will void its warranty. For repair or replacement service that will not void the warranty, you will need to contact the manufacturer or an Ashton Digital authorized service center.