联想电视49g5u，打印信息如下，亮红灯，不开机。

liuxiaoyi549

2018-5-17, 15:48:4
COM4, BaudRate:115200 bps, RXD: VGA->11,TXD: VGA-> 4, Printed by RT809H:

UART_115200


AC_ON
BIST0-OK
BIST1-OK
_U
Relocation Offset is: 01200000
[AT][MB][start ub][441]


U-Boot 2011.06-00003-g7331676-dirty (Aug 21 2016 - 15:17:58)  MBOT-1106.0.10.1340012



msIR_Initialize
Function = SYSOpen, Line = 810, current resource pri_shm content is: 0
Function = SYSOpen, Line = 829, [SYS INFO] OPEN INSTANCE...
create instance at 2B6AE898 with private size 108 bytes at 2B6AE8E0


[MIU INFO] miu opencreate instance at 2B6AE950 with private size 80 bytes at 2B6AE998
create instance at 2B6AE9F0 with private size 48 bytes at 2B6AEA38


uboot held at [2B3DDF60~2CD00000],size=019220A0
CPU  : Monet
Board: BD_MST087B_A50_MONET
DRAM:  205 MiB
Now running in RAM - U-Boot at: 2BE00000


eMMC: HS200 200MHz
eMMC 3.63 GB [747FF8h]


UART BUS OFF!!

天天等

总线关闭状态。UART BUS OFF!!

DongBeide

谢谢你的分享

恒兴家电维修

天天等 发表于 2018-5-17 18:52
总线关闭状态。UART BUS OFF!!

请问如何解决