No LAN connection on WRT3200ACM after first LEDE installation

Hi there,
I have installed lede-17.01.4-mvebu-linksys-wrt3200acm-squashfs-factory.img on a new Linksys WRT3200ACM. After rebooting I can't get a LAN connection to the router. Neither DHCP nor setting a static IP works. As Wifi is turned off on a new LEDE flash, there is no way to connect to the router. Is this a malfunction of the router? I have checked several LAN cables, and made sure they are ok using other devices. Also, the LAN1 indicator on my router briefly flashes every 6 seconds or so, not sure what that is indicating.
Would be very grateful for any pointers in the right direction!
Cheers,
Martin

Access should be there on default IP. Perhaps bad flash, check image CRC? Go back to OEM with the power switch and try again?

You might try failsafe mode...

https://lede-project.org/docs/user-guide/failsafe_and_factory_reset?s[]=failsafe

Remember your device keeps two firmwares installed simultaneously, and you can go back to the stock firmware (and try again) just by switching it on and off using a specific sequence.

try rebooting your modem