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iPhone 12 has no baseband
Machine model:iPhone 12
Fault phenomenon:iPhone 12 has no baseband
Repair process: after receiving the customer’s mobile phone, the mobile phone was brushed by someone else after startup test. It was found that the mobile phone no Baseband Version had no signal and could not be activated after Update System.
iPhone 12 has no baseband Figure 1.
It was found that this is a Previously repaired, and the mainboard was passed by welding after others’separate. It may be caused by the failure of the previous peer in maintenance. The main board was directly replaced with separate, and the middle REBALLING and welding were directly replaced.After welding is completed,Update System passes normally,Baseband comes out, and WiFi can be connected to the network, so the maintenance is over.
iPhone 12 has no baseband Figure 2.
iPhone 12 has no baseband Figure 3.
