求助：按照android光盘的步骤烧写，但是启动失败

yetongf

按照android光盘的步骤一键式烧写，蜂鸣器的提示音也有了，但是启动失败，卡死在Starting kernel这一步。

****************************************

**    u-boot 1.1.6                    **

**    Updated for OK6410  TE6410 Board  **

**    Version (2012-09-23)          **

**    OEM: Forlinx Embedded           **

**    Web: http://www.witech.com.cn   **

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CPU:     S3C6410 @532MHz

         Fclk = 532MHz, Hclk = 133MHz, Pclk = 66MHz, Serial = CLKUART (SYNC Mode)

Board:   SMDK6410

DRAM:    128 MB

Flash:   0 kB

NAND:    256 MB

In:      serial

Out:     serial

Err:     serial

Hit any key to stop autoboot:  0


NAND read: device 0 offset 0x200000, size 0x500000

s3c-nand: ECC uncorrectable error detected

s3c-nand: ECC uncorrectable error detected

s3c-nand: ECC uncorrectable error detected

5242880 bytes read: ERROR

Boot with zImage


Starting kernel ...


环境变量：
SMDK6410 # printenv

bootargs=root=/dev/mtdblock2 rootfstype=yaffs2 init=/linuxrc console=ttySAC0,115200

bootcmd=nand read 0xc0008000 0x200000 0x500000;bootm 0xc0008000

bootdelay=1

baudrate=115200

ethaddr=00:40:5c:26:0a:5b

ipaddr=192.168.2.111

serverip=192.168.2.100

gatewayip=192.168.2.1

netmask=255.255.255.0

stdin=serial

stdout=serial

stderr=serial

求问该如何调试？