自己做的底板，原来一直用Super4412，由于停产了，现改用Tiny4412，无法烧写。打开电源LED1常亮，LED2-LED4不亮，串口无输出。
Super4412烧写正常，两个不同版本的光盘文件烧写信息如下：
Superboot-4412 V2.1(20141106) by FriendlyARM
Booting from SD
Superboot-4412
Ver: 2.1(20141106)
CPU: Exynos4412 1.5GHz
RAM: 2GB
eMMC: 16GB
Touch Device: no 1-wire
LCD Type: Unknown
Installing OS 'LINUX'
Installing bootloader...
Installing bootloader succeed
Installing bootloader succeed
Installing kernel...
Installing kernel succeed
Installing ramdisk...
Installing ramdisk succeed
Installing fs-image...
Installing fs-image succeed
OS 'LINUX' Installed
Superboot-4412 V2.4(20150713) by FriendlyARM
Booting from SD
eMMC Low-level formating...
eMMC Low-level formatted.
Superboot-4412
Ver: 2.4(20150713)
CPU: Exynos4412 1.5GHz
RAM: 2GB
eMMC: 16GB
Touch Device: no 1-wire
LCD Type: Unknown
Installing OS 'LINUX'
Installing bootloader...
Installing bootloader succeed
Installing bootloader succeed
Installing kernel...
Installing kernel succeed
Installing ramdisk...
Installing ramdisk succeed
Installing fs-image...
Installing fs-image succeed
OS 'LINUX' Installed
但Tiny4412就是没反应。一共10块tiny4412的板子，全是一样，没法烧写。另外3块super4412的烧写正常。
