Samsung Galaxy S20 Startup Bright Logo Repeated Restart

Machine model: Samsung Galaxy S20

Fault phenomenon: after the mobile phone turns on the logo, it will restart

Fault analysis: Samsung S20 Restart repeatedly, common causes are accessories problems, motherboard problems, power problems.When repairing, first replace accessories, carry out battery test, eliminate accessories or battery problems, and then repair the motherboard after confirming the fault is in the motherboard.

Repair process: when I received this machine, my colleague happened to have a Samsung S20 mobile phone of the same model. His fault was the mobile phone no booting. There was a problem with the motherboard and it had been repaired.Restart the main board of his machine. It’s not the fault that he borrowed from the main board to test it.

Samsung Galaxy S20 Startup Bright Logo Repeated Restart Figure 1.

Test the replacement of the parts of the restart machine one by one, and finally confirm that the restart is caused by the display problem.Take a new screen, install after boot test, the phone can enter the system normally, fault repair.