initializing SDRAM Fail on Pine A64+ with 2GB RAM

[cnxsoft]

I've flashed Android 5.1.1 image (March dd image) to a micro SD card, and after spending some time to find a power supply + USB cable combination that would actually boot the board, I get the red LED always on with the following log looping in the serial console:

Code:

HELLO! BOOT0 is starting!
boot0 commit : 2fe7b0a9fb512fae2996ec1a2ba89d535e1f3c4d

boot0 version : 4.0.0
set pll start
set pll end
rtc[0] value = 0x00000000
rtc[1] value = 0x00000000
rtc[2] value = 0x00000000
rtc[3] value = 0x00000000
rtc[4] value = 0x00000000
rtc[5] value = 0x00000000
DRAM driver version: V1.1
rsb_send_initseq: rsb clk 400Khz -> 3Mhz
PMU: AXP81X
ddr voltage = 1500 mv
DRAM Type = 3 (2:DDR2,3:DDR3,6:LPDDR2,7:LPDDR3)
DRAM clk = 672 MHz
DRAM zq value: 003b3bdd
DRAM error status 0
DRAM init error!
initializing SDRAM Fail.

It looks like some hardware issue with the RAM on the board. Is there a way to set lower DRAM frequency to see if that fixes it?