iPhone 8 Plus no serviecs repair

Machine model: iPhone 8 Plus

Fault:no serviecs is displayed in the upper left corner of the boot.
Maintenance process: received an iPhone 8 Plus of no Baseband Version, and found tha no serviecs was displayed on the activation interface in the upper left corner.i4 soft could not see IMEI online, so it could not be activated.

iPhone 8 Plus no serviecs repair figure 1.

First of all, look at the Baseband CPU and Baseband power supply without any traces of maintenance. There is no problem in measuring Baseband for S1-S5 Baseband Baseband of Baseband power supply. In this case, it is unlikely that Baseband and Baseband power supply will be broken. Check other problems first.

iPhone 8 Plus no serviecs repair figure 2.

no Baseband Version no serviecs can also be caused if iPhone TC 23811′ s big RF chip is damaged. You can use another RF chip to judge whether it is caused by RF chip. Pay attention to the glue on the bottom of 8P RF, and be careful when pry it.

iPhone 8 Plus no serviecs repair figure 3.

After cleaning PAD, all the empty spots are checked out. Replace RF chip removed from Parts motherboard directly and mount it, and then Update System(iPhone of no Baseband Version is inactive after brushing machine,Update System will be recognized normally after maintenance).

iPhone 8 Plus no serviecs repair figure 4.

After the completion of Update System, the device IMEI has come out, which means that no Baseband Version is caused by RF, and the activation card test signal is full.