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I finally found the uart pins on the pcb. I also found a voltage regulator for the hdmi chip was not getting powered up, explaining the no hdmi. I tried force powering it, no change on the hdmi output when that regulator was enabled. I also tried another known real samsung microsd card, still fails. Bootlogs attached if anyone has any idea what to check next. I tried disabling the hdmi output since the chip wasnt getting power anyways, multiple dts files, but all seemed to stop at this line printk: bootconsole [uart8250] disabled https://pastebin.com/8dyJFjie Is the output simply being disabled at this point? I am unable to type into the console after this. Here is the factory android boot log. https://pastebin.com/J01HcFiu Her is a photo of the pcb. https://pasteboard.co/abnDv9o21RXY.jpg

Hello everyone, Just found this by chance and I have one of these boxes sitting around gathering dust that would be awesome to make use of. Sadly Im running into issues and wanted to see if anyone has ideas to help. Ive exhausted all the troubleshooting i know I have a cs918 v7.0 box, here are some photos i found online that include pictures of the internals. https://www.admir.kiev.ua/ru-i-offer-i-id-i-646057-i-android-tv-cs918-mk888q7-2gb8gb-android-smart-tv-box-smart-tv-me.html It has rk3188 with RTL8723 wifi and ip101 ethernet. The android on the nand boots and works fine I tried multiple images and all the rk3188 dts files, the device seems to start booting but I get no HDMI output. The ethernet seems to establish a link but does not send out any packets for a DHCP request or anything at all, no traffic at all seen from the port. Same with a usb ethernet adapter, establishes a link but no traffic. A usb keyboard has working numlock/cap lock leds so it does not seem to be frozen, and ctrl alt del reboots the system. I tried 2x different chipset usb/serial adapters, they seem to get initialized but i dont get any output with them after adding console=ttyUSB0,9600n8 to the extlinux.conf file. Any ideas how to troubleshoot this? No display, console, and no network connection means I have no idea what's going on. I cannot find any connection points for uart on the pcb as well. Even if i did find a uart line, will armbian output logs over it?