Dell chromebook 11 (3120) touchscreen model specification & current issue
display: 11.6-inch HD (1366 x 768) touchscreen display (this is a touchscreen variant)
processor: Intel Celeron N2840 (dual-core)
RAM: 2GB / 4GB DDR3L
storage: 16GB / 32GB eMMC flash memory
battery: 3-cell 43Wh (type: SR9DD)
OS: Chrome OS
current condition & repair note:
main problem: The laptop only has an issue with the Wi-Fi card / Wi-Fi signal (the Wi-Fi signal is weak when far or not receiving properly).
solution: There is no problem with the motherboard or any other parts. Changing or replacing the internal Wi-Fi card will make the Wi-Fi work properly again.
(As seen in the picture, the Wi-Fi card can be detached separately, so it is very easy to fix this by installing a new Wi-Fi card.)