维修与分析：检测各路供电均正常，接串口显示AddrBus test failed!!! TXL:BL1:1ef924:56431c;FEAT:ADFD718C;POC:1;RCY:0;EMMC:0;READ:0;0.0;CHK:0; TE: 64122 BL2 Built : 18:02:44, Feb 23 2017. txl g3629254 - xiaobo.gu@droid05 set vcck to 1100 mv set vddee to 1000 mv set vddee enable AO_8 to high set vddee enable AO_2 to high DRAM reset... init panel power Board ID = 7 CPU clk: 1200MHz DDR enable rdbi DQS-corr enabled DDR scramble enabled DDR3 chl: Rank0+1 @ 792MHz – PASS Rank0: 1024MB-2T-11 Rank1: 512MB-2T-11 DataBus test pass! ADDR-W[0x00000040]:0xaaaaaaaa,R:0xaaaaaa8a ADDR-W[0x00002000]:0xaaaaaaaa,R:0xaaaaaa8a重复打印，怀疑主芯片或MEMC有虚焊现象，补焊故障依旧，更换主芯片U1C后问题问题解决。
