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- Tue Oct 28, 2025 22:35
- Forum: Technical Support
- Topic: BB3 (MCGU GF4) Firmware Flash Failure and Device Unresponsive
- Replies: 1
- Views: 13340
BB3 (MCGU GF4) Firmware Flash Failure and Device Unresponsive
Hello, I need help with a serious issue. I’m using a BB3 (BlackBox Mk3) with a Gunfighter Mk3 base and MCG Ultimate GF4 grip. I tried updating to the latest firmware: _BlackBox_Mk3_Unified_v2_19_9 , but I kept getting the error message: "Device signature not correct" – flash failed. So I m...