KSilva

That was it!! I had Multitool from January (not that old) but as soon as I got a new copy, it worked flawlessly with the USB stick. The board is finally live and running thanks to you

@jockFollowing your advice, I readjusted the connections (it got substantially better) and managed to get a little further. However, there seems to be a problem related to kernel? Sidenote for future refference to everyone with this board: The OTG port is the one labeled "USB1" that is closest to the Reset button. I burned multitool on a USB stick and tried first with an armbian image (Armbian_21.02.3_Rk322x-box_buster_legacy_4.4.194) and here is the log: Then I figured I could try with an "official" android image and the result was the following: Maybe I should try a different image with older kernel? I'm almost seeing the light at the end of the tunnel

Hi @jock, serial connections are new to me, sorry for that. After searching for a while I managed to connect the board and here is the log. There are some strange characters in there, maybe I'm setting the wrong speed? (set it to 115200) But it seems that there is no boot.env. At least the board isn't completely dead and is strugling to survive

Bonne nuit @gurzixo (I hope you are enjoying Algarve, I plan to go living there when I retire ) @jock and @gurzixo, unfortunately I think my board is really broke. I tried several times connecting in both Win and Linux, with no success. No connecting sound in Windows, no lights on the board, nothing in rkdevtool. I've connected the board through a serial adapter and here's what it shows: 00000000 2021-04-14 00:03:50,7881123 PnP Event: Connect DOWN 0x00000000 5c 00 3f 00 3f 00 5c 00 55 00 53 00 42 00 23 00 56 00 49 00 … \.?.?.\.U.S.B.#.V.I.… 00000001 2021-04-14 00:03:50,7881718 +0,0000595 IRP_MJ_CREATE - process 11192 (Studio.exe) DOWN 0x00000000 00000002 2021-04-14 00:03:50,7936970 +0,0055252 IRP_MJ_CREATE UP 0x00000000 00000019 2021-04-14 00:03:50,7938560 +0,0000047 IRP_MJ_DEVICECONTROL: IOCTL_SERIAL_SET_BAUD_RATE DOWN 0x00000000 00 c2 01 00 .... 00000020 2021-04-14 00:03:50,7947138 +0,0008578 IRP_MJ_DEVICECONTROL: IOCTL_SERIAL_SET_BAUD_RATE UP 0x00000000 00000021 2021-04-14 00:03:50,7947928 +0,0000790 IRP_MJ_DEVICECONTROL: IOCTL_SERIAL_CLR_RTS DOWN 0x00000000 00000022 2021-04-14 00:03:50,7955705 +0,0007777 IRP_MJ_DEVICECONTROL: IOCTL_SERIAL_CLR_RTS UP 0x00000000 00000023 2021-04-14 00:03:50,7955831 +0,0000126 IRP_MJ_DEVICECONTROL: IOCTL_SERIAL_CLR_DTR DOWN 0x00000000 00000024 2021-04-14 00:03:50,7967021 +0,0011190 IRP_MJ_DEVICECONTROL: IOCTL_SERIAL_CLR_DTR UP 0x00000000 00000025 2021-04-14 00:03:50,7967265 +0,0000244 IRP_MJ_DEVICECONTROL: IOCTL_SERIAL_SET_LINE_CONTROL DOWN 0x00000000 00 00 08 ... 00000026 2021-04-14 00:03:50,7967306 +0,0000041 IRP_MJ_DEVICECONTROL: IOCTL_SERIAL_SET_LINE_CONTROL UP 0x00000000 00000027 2021-04-14 00:03:50,7967384 +0,0000078 IRP_MJ_DEVICECONTROL: IOCTL_SERIAL_SET_CHARS DOWN 0x00000000 00 00 00 00 11 13 ...... 00000028 2021-04-14 00:03:50,7967409 +0,0000025 IRP_MJ_DEVICECONTROL: IOCTL_SERIAL_SET_CHARS UP 0x00000000 00000029 2021-04-14 00:03:50,7967481 +0,0000072 IRP_MJ_DEVICECONTROL: IOCTL_SERIAL_SET_HANDFLOW DOWN 0x00000000 00 00 00 00 00 00 00 00 6c 86 00 00 9b 21 00 00 ........l....!.. 00000030 2021-04-14 00:03:50,7986610 +0,0019129 IRP_MJ_DEVICECONTROL: IOCTL_SERIAL_SET_HANDFLOW UP 0x00000000 00000031 2021-04-14 00:03:50,7986958 +0,0000348 IRP_MJ_DEVICECONTROL: IOCTL_SERIAL_SET_TIMEOUTS DOWN 0x00000000 0a 00 00 00 00 00 00 00 00 00 00 00 0a 00 00 00 2c 01 00 00 ................,... 00000032 2021-04-14 00:03:50,7987003 +0,0000045 IRP_MJ_DEVICECONTROL: IOCTL_SERIAL_SET_TIMEOUTS UP 0x00000000 00000034 2021-04-14 00:03:50,8784723 +0,0796176 IRP_MJ_READ UP 0x00000102 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 … ....................… 00000036 2021-04-14 00:03:51,0208661 +0,1423369 IRP_MJ_READ UP 0x00000102 00 00 00 00 00 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 … ..... ..............… 00000038 2021-04-14 00:03:51,1444437 +0,1235305 IRP_MJ_READ UP 0x00000102 00 00 00 00 00 00 00 00 00 00 00 40 00 00 00 00 00 00 00 00 … ...........@........… 00000040 2021-04-14 00:03:51,2678012 +0,1233120 IRP_MJ_READ UP 0x00000102 00 00 00 02 00 00 00 00 00 00 00 20 00 00 00 00 00 00 00 00 … ........... ........… 00000042 2021-04-14 00:03:51,4679985 +0,2000952 IRP_MJ_READ UP 0x00000102 00 00 00 20 00 00 00 04 00 00 00 00 00 00 00 00 04 00 00 04 … ... ................… 00000044 2021-04-14 00:03:51,5452828 +0,0771656 IRP_MJ_READ UP 0x00000102 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 … ....................… 00000046 2021-04-14 00:03:51,6071353 +0,0617905 IRP_MJ_READ UP 0x00000102 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 … ....................… 00000048 2021-04-14 00:03:51,6853533 +0,0780934 IRP_MJ_READ UP 0x00000102 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 … ....................… 00000050 2021-04-14 00:03:51,7004875 +0,0150652 IRP_MJ_READ UP 0x00000102 00 00 00 00 00 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 … ..... ..............… 00000052 2021-04-14 00:03:51,7311971 +0,0306849 IRP_MJ_READ UP 0x00000102 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 … ....................… 00000054 2021-04-14 00:03:51,7470364 +0,0157561 IRP_MJ_READ UP 0x00000102 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 … ....................… 00000056 2021-04-14 00:03:51,7626234 +0,0155351 IRP_MJ_READ UP 0x00000102 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 … ....................… 00000058 2021-04-14 00:03:51,7786069 +0,0158684 IRP_MJ_READ UP 0x00000102 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 … ....................… 00000060 2021-04-14 00:03:51,7933081 +0,0145387 IRP_MJ_READ UP 0x00000102 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 … ....................… 00000062 2021-04-14 00:03:51,8084435 +0,0150183 IRP_MJ_READ UP 0x00000102 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 … ....................… 00000064 2021-04-14 00:03:51,8706427 +0,0621373 IRP_MJ_READ UP 0x00000102 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 … ....................… I gues there's nothing I can do to revive the board... I've learned my lesson about buying boards without SD slot.

Well, I'll try to answer all your questions. @fabiobassa The USB cable was bought (not homemade built) so I guess I don't need to switch the wiring. Also, sometimes (I guess half of the tries) Windows does show a popup message saying "USB device not recognized", but still not visible by any flashing tool. I'll give it another try, pressing the boot switch and try to use the USB ports on the back of my PC. @jock I've shortened the pins on the eMMC, I even shortened more the the 7th and 8th pin at the same time. No HDMI signal and no lights on the PCB. I have the firmware available HERE Again, big thanks to you guys

Hi @jock, and thank you for your help. That's exactly what I've been trying to do, I'm trying to connect the board through a male-male USB cable, using rkdeveloptool, but it isn't detected. When i execute "lsusb" here's what it shows: [casacr@localhost rkdeveloptool]$ lsusb Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 8087:0a2a Intel Corp. Bluetooth wireless interface Bus 001 Device 004: ID 048d:8911 Integrated Technology Express, Inc. Bus 001 Device 002: ID 05e3:0608 Genesys Logic, Inc. Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub That's why I think I need to short the board... I'm trying with just the usb cable, without power cord. I don't know wich one is the OTG port, so I've been trying both.

Hi friends, First let me thank you all for the great work, and I've learned a lot by browsing the forum. But now I really need your help... I bought a H96 Mini V8 (RK3228A chip) with the single purpose of flashing Armbian. Since the board doesn't have SD Card slot, i tried to flash it with an USB pen, but couldn't get into Recovery Mode, since it allways showed a "No command" error screen. Then, I tried to flash it within the "Developer Mode" (what a BIG mistake) and ended up bricking the board... I'm heavily trusting what @jock said: So now I can't connect it to my PC... I tried Win7, Win10 and Linux (Fedora) but the device is never recognized by RockChip Batch Tool... Any thoughts on how I can be sure the correct drivers are installed? I tried to short the pins in the eMMC and both pins in the back of the board, as shown bellow: https://i.postimg.cc/tRvSvwJR/IMG-20210405-213054.jpg https://i.postimg.cc/dt7Wb6Z2/IMG-20210405-213752.jpg Thank you in advance for you help. Any further information you need, just ask