BBAI Unable to boot from EMMC while inserting a blank SD card

I need to put the program on the eMMC and use an SD card to store the data. But when I insert an empty SD card, the board card cannot boot the system from eMMC

Resolved. With the R689 resistor removed, I can boot from eMMC when inserting an SD card.

在2020年12月29日星期二 UTC+8 下午10:18:53<张大嘴> 写道:

What I’m facing now is when I change something on uboot - on sd or emc the beagle is not booting -the board is not booting - the power led is on but all the rest is off - and there is nothing on hdmi or serial console .
I have to restore the flash or undo the changes on sdcard.
For instance I update the kernel and after a reboot the leds is all off.