故障现象：卡在开机logo一会后待机
故障原因分析：检修此机芯，由先软件，后硬件，先简单判断，在复杂维修的原则，首先用U盘升级主程序，如果故障未排除在检测主板的DC-DC，LDO供电是否异常然后进一步判断
检修过程：此机可以正常升级U盘主程序，不过升级完以后故障还是原来一样 ，故障打印信息如下：
[ 11.695336] pgd = edd58000
[ 11.698057] [00c04000] *pgd=00000000[ 11.701703] Internal error: Oops: 5 [#1] PREEMPT SMP ARM
[ 11.708414] Process installd (pid: 1793, stack limit = 0xeee86238)
[ 11.714600] Stack: (0xeee87e90 to 0xeee88000)
[ 11.718965] 7e80: 00000100 00000200 ec0a8880 00000000
[ 11.727151] 7ea0: eac48c00 eac48c00 eac48c20 ee9220d0 ee7e6c60 ee7e6c60 00000000 00000008
[ 11.735337] 7ec0: eee87edc eee87ed0 c008a40c c011307c eee87ef4 eee87ee0 c008a4a0 c008a3d4
[ 11.743523] 7ee0: ede420c0 ee7e6c60 eee87f0c eee87ef8 c008bd84 c008a41c
怀疑CPU损坏，更换CPU MSD6A346ATT-8-XZ后修复。
故障板号：RSAG7.820.9664
故障元件：MSD6A346ATT–XZ