alex_solon

Hey @fabiobassa, i actually JUST got into MaskROM mode by shorting every single pin of the two 510 resistor arrays coming from the eMCP to the rk3228a (labeled by the chip manufacturer on the chip) with ground lol, apparently those are all just data pins and the CLK signal too, or at least thats what Gemini said. Took me way like 3-4 days to figure this out... But yeah I guess all thats left to do is to clear the flash and to put a bootloader and an armbian image on it

Hi everyone! I have some issues accessing MaskROM mode on my H20_221_V1.8_230925 board (product name H20 4K Ultra HD Quad Core CPU). This board has already been talked about here in 2024, but mine has 8 gigs of storage and 1 gig of RAM instead of 16 and 2. They had the same display issues as me: no display, but connecting to the board via ssh worked fine. Last time I got the board in MaskROM was to try to put another image of Armbian on it, not the first time I did that to try to fix display issues(i didnt know about the led-conf fix at that point in time), but this time I just installed the same bootloader and the same image multiple times and in very random orders without deleting anything before trying again, did that until the develop tool said that both were written successfully, I think I was sleep deprived as hell or something idk. Now, I tried connecting it to Ethernet, but it does not show up in the DHCP client list like it did before, so I couldnt connect to it by ssh like I have before. Pushing the button behind the AV port, inserting the USB-A to USB-A cable, giving it power and holding the button for like 5 seconds longer didnt get me into MaskROM, tried both ports and different press times. I also tried to short out a 0.5 ohm resistor near the eMCP (on the photo with a red arrow pointing at it) with ground, but it didnt work, absolutely nothing in logs when monitoring the usb connection. However, when I power the board on, the red LED stays off for the time when I hold the wire, and almost immediately upon release, the red LED turns on, just a steady red light. Maybe I can get the CLK signal from somewhere else, I dont even really know wheher what I did does anything tbh... Also I tried putting Multitool on a MicroSD and booting with that, but there was nothing getting displayed(tried pushing the button before powering it, too), nothing from the usb connection. Does anyone have any potential ways to get it into MaskROM or some other way to erase everything from the memory and then flash it with Armbian? Here are the images of the board near the chip(idk if you can see everything you need to, if not then the 2024 post with practically the same board also has photos, those might be better for this). I will try my best to provide additional info if you need it, cuz I really dont know what Im doing :P