What model is that? RB2011L... or similar? L stands for Lite edition with a couple of features disabled. These have 64M and I had one once. I never got the serial working from the exposed pins. I figured out the lanes weren't connected properly and you have to patch the lanes from the SOC directly.
But I remember now in which shelf this PCB collects dust, maybe I can get my hands on it again. I'll need to ask a friend.
Edit: Ah, NVM. Just saw now @Leo-PL already successfully tested flashing one of these. @g6094199 Have you tried restoring RouterOS to fixup possible badblocks?
i dont believe in a worn chip cause the unit was never in duty. else the chip would be bad from fractory.
i payed around a bit today but i didnt get the initram version booting correctly. since i got it working in the past i have to figure out whats wrong right now.
anyway looking forward for you PR
there is no problem on ROS. we already discussed this last year ...somewhere above...
It might be wise to upgrade routerboot to something more modern, like 6.4x. I wouldn't recommend going for v7.x just yet, I had issues booting OpenWrt on that one on other devices, even using new YAFUT images.
If the time permits, I'll try attaching to my 2011L serial debug header with a pogo clip and figure it out.
As for SFP, I've got the module to probe, but it doesn't look like SGMII SERDES on AR8237 port 6 is transmitting nor receiving anything.
