winbox access not via mac or via ip only via internet

I use a 493G with RouterOS 6.19. always had a “problem”, only can connet via mac or from internet, can’t connect via IP locally. But last week we had a electric cut for some hours, and after that I can’t access via mac or IP, only from internet. I don´t know why.
Any hlep?

Thank you in advance

(sorry about my english)