Acer Chromebook 11 C721 & R721T Bottom Cover Replacement

Replacing the bottom cover of an Acer Chromebook 11 C721 (or its 2-in-1 counterpart, the R721T) is a standard maintenance procedure typically required for devices in educational environments. Because the C721 is a fanless device, the bottom cover plays a critical role in heat dissipation and protecting the motherboard from environmental contaminants.

Guide Details
Repair typeBottom Cover Replacement
DifficultyEasy
Estimated time15 min
Steps1
Parts Needed
  • Bottom Cover P/N: 60.HBNN7.001
Tools Required
  • Phillips Screw Driver
  • Plastic Pry Tool
Materials
  • Lint-free Wipes
Step 1

Remove bottom cover screws

This model generally uses 11 Phillips #0 screws. Unlike some other Acer models, these are typically visible and not hidden under the rubber feet, making initial access very simple. [Info] The C721 uses tight plastic clips around the front edge near the trackpad. A plastic prying tool is necessary to unclip these without damaging the soft-touch finish of the palm rest. [Warning] Be aware that the internal battery is held in place partly by the tension of the bottom cover. If your original cover was bulging, it may indicate a swollen battery that should be addressed during the replacement.

Remove bottom cover screws image 1
Active Image Fastener Legend (11)
This model generally uses 11 Phillips #0 screws. Unlike some other Acer models, these are typically visible and not hidden under the rubber feet, making initial access very simple.
Info
The C721 uses tight plastic clips around the front edge near the trackpad. A plastic prying tool is necessary to unclip these without damaging the soft-touch finish of the palm rest.
Warning
Be aware that the internal battery is held in place partly by the tension of the bottom cover. If your original cover was bulging, it may indicate a swollen battery that should be addressed during the replacement.

Conclusion

Clip Alignment: Gently press along the edges of the chassis to ensure every plastic clip has clicked into place before tightening the screws. Screw Tension: Ensure all 11 Phillips #0 screws are snug. Avoid over-tightening, as the plastic threading in the palm rest assembly can strip under excessive force. Port Clearance: Visually inspect the USB and charging ports to make sure the new cover isn't obstructing any openings or causing the ports to sit at an angle. With the new housing secured, your Chromebook is back to its original MIL-STD-810G durability standards, ready for the classroom or the office.

Step 1 of 1
Remove bottom cover screws