iPhone 8 garbage board bottom phone has no service repair

Machine model: iPhone 8

Fault phenomenon: the mobile phone has been no serviecs, the rear shell glass is broken,charging connector is also loose.

iPhone 8 garbage board bottom phone has no service repair Figure 1.

Maintenance process:charging connector is not tight. If you look at the hole of charging connector carefully, you can find a lot of dirty things. Just pick it out with tweezers.Boot into the system to display no serviecs, there is no Baseband version.

iPhone 8 garbage board bottom phone has no service repair Figure 2.

For machines from generation 8 to x, if there is no firmware version in the system after 13, it does not necessarily mean that the working conditions of Baseband are not satisfied. Many of them are caused by the failure of RF, so replace RF directly.

Remove the motherboard and find out whether it is the bottom h3k5 which is easy to cause problems, or the worst rainbow board. If the bottom of the board is slightly heated, it will cause Low current, and it will be replaced after reporting the risk to the customer.