I think i Messed up rooting it, now can't enter recovery mode to flash rom.

Hi guys, its my first time and i have a problem. I just rooted my phone via fastboot and done it successfully but i cannot enter into recovery mode to flash rom. I dont see the android with the danger sign on it. I cant update the device whenever a new update from asus comes in. Idk what to do guys. Help :crying:

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