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| Hello, Loboris. Thanks for your good work. I bought an Orange PI PC and tried to follow your suggestions on your post.
 I downloaded OrangePI-PC_Ubuntu_Vivid_Mate.img prepared for OrangePI users, just copy to SDCard, no configuration needed !
 
 I  copied to SD card with win32 disk imager , then I linked an USB to TTL cable to rx/tx and I put the SDCard in the
 Orange PI PC.
 The boot messages were as follow, but nothing appears on HDMI
 and nothing more appears on the serial.
 
 What is wrong ?
 
 HELLO! BOOT0 is starting!
 boot0 version : 4.0.0
 fel_flag = 0x00000000
 rtc[0] value = 0x00000000
 rtc[1] value = 0x00000000
 rtc[2] value = 0x00000000
 rtc[3] value = 0x00000000
 rtc[4] value = 0x00000000
 rtc[5] value = 0x00000000
 rtc[6] value = 0x00000000
 rtc[7] value = 0x00000000
 DRAM DRIVE INFO: V0.8
 DRAM Type = 3 (2
  DR2,3  DR3,6  PDDR2,7  PDDR3) DRAM CLK = 672 MHz
 DRAM zq value: 003b3bfb
 READ DQS LCDL = 001d1c1e
 DRAM SIZE =1024 M
 odt delay
 dram size =1024
 card boot number = 0
 card no is 0
 sdcard 0 line count 4
 [mmc]: mmc driver ver 2014-12-10 21:20:39
 [mmc]: ***Try SD card 0***
 [mmc]: SD/MMC Card: 4bit, capacity: 15193MB
 [mmc]: vendor: Man 00035344 Snr 000e8443
 [mmc]: product: SS16G
 [mmc]: revision: 8.0
 [mmc]: ***SD/MMC 0 init OK!!!***
 sdcard 0 init ok
 The size of uboot is 000dc000.
 sum=ede66ee7
 src_sum=ede66ee7
 Succeed in loading uboot from sdmmc flash.
 Ready to disable icache.
 Jump to secend Boot.
 SUNXI_NORMAL_MODE
 already secure mode
 
 [      0.376]
 
 U-Boot 2011.09-rc1 (Jun 21 2015 - 19:33:17) Allwinner Technology
 
 [      0.383]version: 1.1.0
 normal mode
 [      0.391]pmbus:   ready
 not set main pmu id
 axp_probe error
 [      0.406]PMU: pll1 1200 Mhz,PLL6=600 Mhz
 AXI=400 Mhz,AHB=200 Mhz, APB1=100 Mhz
 sid read already
 fel key new mode
 run key detect
 no key found
 no key input
 dram_para_set start
 dram_para_set end
 normal mode
 [      0.437]DRAM:  1 GiB
 relocation Offset is: 35af9000
 [box standby] read rtc = 0x0
 [box_start_os] mag be start_type no use
 user_gpio config
 user_gpio ok
 gic: normal or no secure os mode
 workmode = 0
 MMC:     0
 [      0.511][mmc]: mmc driver ver 2014-12-10 9:23:00
 [      0.516][mmc]: get sdc_phy_wipe fail.
 [      0.520][mmc]: get sdc0 sdc_erase fail.
 [      0.524][mmc]: get sdc_f_max fail,use default 50000000Hz
 [      0.529][mmc]: get sdc_ex_dly_used fail,use default dly
 [      0.535][mmc]: SUNXI SD/MMC: 0
 [      0.548][mmc]: *Try SD card 0*
 [      0.599][mmc]: CID 0x3534453 0x53313647 0x80000e84 0x4300f4d1
 [      0.604][mmc]: mmc clk 50000000
 [      0.608][mmc]: SD/MMC Card: 4bit, capacity: 15193MB
 [      0.613][mmc]: boot0 capacity: 0KB,boot1 capacity: 0KB
 [      0.618][mmc]: ***SD/MMC 0 init OK!!!***
 [      0.622][mmc]: erase_grp_size:0x1WrBlk * 0x200 = 0x200 Byte
 [      0.628][mmc]: secure_feature 0x0
 [      0.631][mmc]: secure_removal_type  0x0
 [      0.635]sunxi flash init ok
 script config pll_de to 864 Mhz
 Not Found clk pll_video1 in script
 script config pll_video to 297 Mhz
 [boot]disp_init_tv
 [DISP_TV] disp_init_tv enter g_tv_used
 screen 0 do not support TV TYPE!
 [BOOOT_DISP_TV] disp tv device_registered
 unable to find regulator vcc-hdmi-18 from [pmu1_regu] or [pmu2_regu]
 enable power vcc-hdmi-18, ret=-1
 DRV_DISP_Init end
 boot_disp.auto_hpd=1
 auto hpd check has 50 times!
 [disk_read_fs] no the partition
 error: open disp_rsl.fex, maybe it is not exist
 attched ok, mgr1<-->device1, type=2, mode=11----
 ready to set mode
 disp_tv_enable
 [      1.476]finally, output_type=0x2, output_mode=0xb, screen_id=0x1, disp_para=0x20b0000
 fail to find part named env
 Using default environment
 
 In:    serial
 Out:   serial
 Err:   serial
 --------fastboot partitions--------
 mbr not exist
 base bootcmd=run setargs_mmc boot_normal
 bootcmd set setargs_mmc
 key 0
 cant find rcvy value
 cant find fstbt value
 no misc partition is found
 to be run cmd=run setargs_mmc boot_normal
 [      1.513][mmc]: MMC Device 2 not found
 [      1.517][mmc]: Can not find mmc dev
 [      1.521][mmc]: read first backup failed in fun sdmmc_secure_storage_read line 1849
 sunxi_secstorage_read fail
 get secure storage map err
 the private part isn't exist
 WORK_MODE_BOOT
 adver not need show
 sunxi_bmp_logo_display
 [disk_read_fs] no the partition
 error: open bootlogo.bmp, maybe it is not exist
 sunxi bmp info error : unable to open logo file bootlogo.bmp
 [      1.554]Hit any key to stop autoboot:  3  2  1  0
 [      4.813][mmc]: blkcnt should not be 0
 [      5.286][mmc]: blkcnt should not be 0
 ## Booting kernel from Legacy Image at 40007800 ...
 Image Name:   Linux-3.4.39
 Image Type:   ARM Linux Kernel Image (uncompressed)
 Data Size:    10915552 Bytes = 10.4 MiB
 Load Address: 40008000
 Entry Point:  40008000
 Verifying Checksum ... OK
 Loading Kernel Image ... OK
 OK
 [      5.477][mmc]: MMC Device 2 not found
 [      5.481][mmc]:  mmc  not find,so not exit
 [      5.485]
 Starting kernel ...
 
 
 
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