Newly acquired Mac mini M1. No video output on HDMI or Apple TB3 to TB2 adapter after attempting overnight restoration to mini from TC backup of MB Pro (Intel, Monterey). Cannot enter recovery mode. Verified all externals are working perfectly including connectors and cables.
Sounds like you acquired someone else's problem.
You can try a DFU Firmware Restore which resets the security enclave chip, system firmware, and internal SSD (destroying all data on it) followed by pushing a clean copy of macOS onto the internal SSD. Unfortunately this process requires access to another Mac currently running macOS 26.x Tahoe, or macOS 15.7.3+ Sequoia. If the DFU Firmware Update does not resolve the problem, then the computer likely has some sort of hardware issue....most likely with the Logic Board.
If this Mac Mini was advertised as working, then you should return it for a full refund.
Sounds like you acquired someone else's problem.
You can try a DFU Firmware Restore which resets the security enclave chip, system firmware, and internal SSD (destroying all data on it) followed by pushing a clean copy of macOS onto the internal SSD. Unfortunately this process requires access to another Mac currently running macOS 26.x Tahoe, or macOS 15.7.3+ Sequoia. If the DFU Firmware Update does not resolve the problem, then the computer likely has some sort of hardware issue....most likely with the Logic Board.
If this Mac Mini was advertised as working, then you should return it for a full refund.
Mac mini M1: No video, no recovery after restoration
