求大家帮忙看下我这个打印信息

修电视

UART_115200

BIST0-OK
BIST1-OK
_U

Hello U-Boot



U-Boot 1.1.6 (Oct 11 2011 - 23:03:49)


Board: MSTAR AMBER1 (CPU Speed 576 MHz)
DRAM:  256 MBytes
U-Boot is running at DRAM 0x87600000
Module: KEYPAD USB FAT NAND FLASH UBI UBIFS NET SPI STANDBY JFFS2 LOGO OSD ENV=SERIAL
Flash is detected (0x0707, 0xEF, 0x40, 0x14)
MDrv_SERFLASH_GetInfo()
        u32AccessWidth = 1
        u32TotalSize   = 1048576
        u32SecNum      = 16
        u32SecSize     = 65536
>>> nand: AUTO CE/WP



Flash Make code = 0xEC, ID = 0xDC


Flash Make code = 0xEC, ID = 0xDC
...
NAND: 512 MBytes
In:    serial
Out:   serial
Err:   serial
Net:   MSVC00B000100100421604TH0000000T
EnvFlag =: 0x8BCECE5E.....CONFIG_ENV_ADDR=: 0xE0000
cbuffer[0] =:0xFF...cbuffer[1] =:0xFF...cbuffer[11] =:0xFF
Check USB port[0]:
Error, couldn't init Lowlevel part
Check USB port[1]:
Error, couldn't init Lowlevel part
keypad_pressed_1 is:0
[0]adc_val =:0xFF
keypad_pressed_2 is:0
--> ac boot <--


UART BUS OFF!

保山

升级一下

修电视

想请教是不是NAND故障，就有几行不对，我上块好板。
Flash is detected (0x0B01, 0xC8, 0x40, 0x14)
MDrv_SERFLASH_GetInfo()
        u32AccessWidth = 1
        u32TotalSize   = 8388608
        u32SecNum      = 128
        u32SecSize     = 65536