How to unbrick a phone that won't power on?

[FreakyLocz14]

It won't even stay booted into recovery mode. The Google logo just flashes on and off continuously. It will occasionally show the boot screen, but will then stay on that forever. I cannot get into recovery mode without it resetting. I've even replaced the battery. The phone is unrooted with no custom ROMs. It is completely stock with zero modifications whatsoever.

Help!!!

 

[B. Diddy]

If you got it through Google, see if you can send it back for a replacement: http://forums.androidcentral.com/go...ram-damaged-nexus-5-phones-2.html#post4094183