HTC One M9 is Dead to The World

Hi,

My HTC One M9 is just, well, completely dead. I have switched to another phone at this point - looks like I switched just in time. I had done nothing before but try a software update (which miraculously failed) and after that the bootloader locked the phone. I left it alone for a bit, and when I came back to it, the thing was completely unresponsive. Not even the PWR+VOLUP or PWR+VOLDWN+VOLUP tricks work. It can’t start at all.

EDIT: I should clarify - it doesn’t seem to charge either. The notification LED stays off, and absolutely nothing happens.

Is there any way to repair the phone?

Thanks