Dead Nexus 5 and bootloader not opening also

My LG Nexus 5 was working good and suddenly it just shut down and never powered on. It showed no sign of life when I plugged it in nor did the bootloader open so I cannot go into recovery mode. I don't think display or battery is damaged (it can be) so please can someone help me with getting the thing turned on? Please I will be happy if it comes back to life.