I have an RB751U-2HnD which has a problem rebooting.
The problem is that each time it tries to boot, it seems to go through its POST, and then all I get is a link light for ether1, the power light, and no other lights, and nothing works. My guess would be that it's stuck in the bootloader, and the only solution I've found is to do a hard reset and then restore the config from a backup. It then works until the next reboot. It's very hard to diagnose anything without a serial console! (This is something I find extremely annoying with 751s --- I'd rather have 4 Ethernet ports and 1 console port, than 5 Ethernet ports and no console at all, but that's a rant for a different post.)
Has anyone seen anything similar?
Is this fixable, or do I need a new 751? Could this be related to the power issue that I've seen discussed elsewhere? Is it worth trying to find a 24V power supply, or should I just get a new board?
(I don't have time to sort out RMAs at the moment, and it's in a different country to where I bought it, and I really need it working.)