Xhorse Dolphin XP05L “No Available WiFi” Solution

Problem:

I turn on the xhorse dolphin xp005l key cutting machine and try to connect with WiFi, but it failed to search WiFi and said no available WiFi. Any suggestion?
Xhorse Dolphin Xp005l No Available Wifi 1

Solution:

Remove dolphin ii screen and check if this black WiFi cable is well connected

Xhorse Dolphin Xp005l No Available Wifi 2

Follow guide below to remove this part

How to Replace Xhorse Dolphin XP005L Screen?