i.MX6SX SABRE SDB板无法启动的原因？

我正在尝试为我的 imx6sx saber sdb 板刷新 imx-image-core。

• 我根据 i.MX Linux 用户指南 PDF 对图像进行了分区。
• 我将我的 SD 卡放入开发板的 SD4 插槽中。SD4选择SW10-SW11-SW12开关，S1 Boot_Mode开关在（01）
• 当启动开发板时，它卡在 u-Boot 默认为 mm3，然后它尝试从网络启动，这是终端：
  

U-Boot 2022.04-lf_v2022.04+g1c881f4da8 (Jun 07 2022 - 05:16:02 +0000)

CPU:   i.MX6SX rev1.2 996 MHz (running at 792 MHz)
CPU:   Extended Commercial temperature grade (-20C to 105C) at 43C
Reset cause: POR
Model: NXP i.MX6 SoloX SDB RevB Board
Board: MX6SX SABRE SDB revD
DRAM:  1 GiB
Core:  119 devices, 22 uclasses, devicetree: separate
PMIC: PFUZE100! DEV_ID=0x11 REV_ID=0x21
MMC:   FSL_SDHC: 1, FSL_SDHC: 2, FSL_SDHC: 3
Loading Environment from MMC... *** Warning - bad CRC, using default environment
-Video Link 0 (800 x 480)
        [0] lcdif@2220000, video
In:    serial
Out:   serial
Err:   serial
SEC0:  RNG instantiated
switch to partitions #0, OK
mmc3 is current device
flash target is MMC:3
Net:   eth0: ethernet@2188000 [PRIME]Get shared mii bus on ethernet@21b4000
, eth1: ethernet@21b4000
Fastboot: Normal
Normal Boot
Hit any key to stop autoboot:  0
switch to partitions #0, OK
mmc3 is current device
Can't set block device
Can't set block device
Booting from net ...
ethernet@2188000 Waiting for PHY auto negotiation to complete......................................... TIMEOUT !
Could not initialize PHY ethernet@2188000
BOOTP broadcast 1
BOOTP broadcast 2
BOOTP broadcast 3
BOOTP broadcast 4
BOOTP broadcast 5
BOOTP broadcast 6
BOOTP broadcast 7
BOOTP broadcast 8
BOOTP broadcast 9
BOOTP broadcast 10
BOOTP broadcast 11
BOOTP broadcast 12
BOOTP broadcast 13
BOOTP broadcast 14
BOOTP broadcast 15
BOOTP broadcast 16
BOOTP broadcast 17

Retry time exceeded; starting again
ethernet@2188000 Waiting for PHY auto negotiation to complete......................................... TIMEOUT !
Could not initialize PHY ethernet@2188000
BOOTP broadcast 1
BOOTP broadcast 2
BOOTP broadcast 3
BOOTP broadcast 4
BOOTP broadcast 5
BOOTP broadcast 6
BOOTP broadcast 7
BOOTP broadcast 8
BOOTP broadcast 9
BOOTP broadcast 10
BOOTP broadcast 11
BOOTP broadcast 12
BOOTP broadcast 13
BOOTP broadcast 14
BOOTP broadcast 15
BOOTP broadcast 16
BOOTP broadcast 17
我该怎么办，似乎有什么问题？也许我的密码配置或我的 SD 卡没有正确闪烁？