Question HTC One only HBOOT working - Vol down and power unresponsive

Good day all,
I have a HTC One M7_UL stuck in HBOOT and cannot enter fastboot or recovery. The vol down and power buttons are not responding so I cannot enter any other mode when it gets stuck in HBOOT. I can only move down by using the vol up button (strange), but cannot press power to enter any of those modes. When I try to reboot by pressing vol down and power, the back and home navigation buttons start to flash and the phone goes straight to HBOOT again. Can anyone offer some help with this? I appreciate.
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I have a MOTO X - XT1049 (GSM Unlocked) with talk, text and 3G data flashed to
And a Nokia Lumia 822 on MTN Nigeria
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Current Phones
MOTO X - XT1049 & Nokia Lumia 822
Current ROM
N5 Experience 4.4.4 & Windows Phone 8.1 Developer Preview