uehqsvbm

armbian does not boot from sdcard with Android bootloader.
It will boot from sdcard once it is installed in emmc, so you can test other armbian images from sdcard without overwriting emmc.

@uehqsvbm
It could be that those three pins near ir receiver are just reversed order of ir receiver. I have seen similar designs. They just put multiple pads for different devices. I hear they are going to start doing more of that in future because of chip shortage. You can first the all the pins with a multimeter so that it is below 3.3v but I do not think this board has uart unfortunately. I guess if multiboot works you could get the sources and try to make it into something workable and find out what is wrong that way. Or build from sources and change as many things as possible and see if you get lucky. Actually the best option might be to configure uart TX pin on the led pin or one of the pins of the front led panel or ir receiver. I am pretty sure rk3318 chip is capable of that and I think I saw the full datasheet online. I do think the 1.5Mps uart is little risky high which can cause signal integrity problems.
 
@jock
Can you tell me where this blinking led is configured, it is now shining through the case and I do not like keeping anything that blinks in the house.
 
 
I have not been able to crash my box at 1.3ghz and performance governor with fan cooling. Might give a whirl to overclocking with voltage mod but do not know how yet.

@oolonthegreat This thread is for rk3318 and not rk3188; please open a new thread for that request and also remove the long log lists from here because they make the browsing from mobile very difficult.
 
@Aapo Tahkola I meant the four pads at the right of the IR receiver, not the three pads near the led array: those are clearly pads for diodes if you pay attention to the symbols.
Looking at the back of the @uehqsvbm's board, those four pads have a different wiring than the IR receiver and from the front side there is no immediate connection to the IR receiver; It is not 100% sure because there could be some in-board layer connecting them to IR, but I may guess those are not for IR. Also the central pads immediate connection is to a couple of components that seem to be resistances.
They could also be spare connection for leds, but in such case a single resistance would suffice and placing resistors there is a waste of components since the board does not have leds there.
 
Looking at the front side, the rightmost pad is surely ground (it has the reverse triangle symbol), and the leftmost maybe is VCC (there is a path going to IR receiver), maybe the two central pads are uart RX/TX.
 
About the led blinking led issue, this is what google suggests as first answer: https://linuxreviews.org/HOWTO_Control_LED_Lights