MikroTik

This morning brought the long-awaited RB751G. Of which I waited for more than three weeks.
But I was comprehended by failure. After program updating from v5.11 to v5.14 (mipsbe), the router doesn't boot.
At first Winbox see the router by it's MAC address. But after updating it's doesn't see the router.
I try to reset by circuit reset hole in the bottom of router, but It doesn't help.
I try to to install routeros v5.11 back with netinstall v5.11, but netinstall doesn't see the router.
When I hold RES button at router boot, ACT LED lights on, and after a few seconds its blinking and turned off, then I release RES button.
But after it netinstall doesn't see the router.
Help me please

P.S. Sorry for my ugly english

is anybody from mikrotik support here?

Forum is not a support system, this is a user forum. Please email the support department for urgent matters.

As for the issue - this is a known issue, it is fixed in v5.15, and v5.16 which will be released today.

routeros was successfully downgraded to 5.11, network cable should be inserted into POE port, to install from netinstall

Hi

I tell you to update to version 5.16 and the team did not change the energy you start with 1.5 amps, then use smooth start feeding earlier works without problems
Excuse my English is bad

My mikrotik is Routerboard 751U-2HnD