[Q] Struck on bootloop. No usb debugging. Locked bootloader. topic

The power button on my N5 started acting up, like if i even press it once it will show me the power off option. After that it started to randomly reboot. Now its reboots every 2 sec showing the google logo. When it try to put it in recovery mode, it again reboots. Randomly like 20 in 1 trys it stops in the recovery mode.
1. I tried to factory data reset. I got an error msg something like " Cant mount cache ".
2. Called both Lg and goole for a replacement, but my warranty got over.
3. I unlocked the bootloader using fastboot and tried to flash stock rom, but after the first reboot bootloader command the bootloader again comes to locked status. Still after all process the phone reboots and gets to the booting animation, but it does not move past that( even after an hour).

Device was in full stock condition when this happened. Someone please help me out!! :confused:

[Q] unable to flash stock,install rom,and struck at recovery loop topic

anyone pls.i need a help seriously..i installed blisspop 1.8 in my lg f240L.everythng worked fine.but i found that my call voice quality was very low and thought of going back to my old rom VUPMP.so aas i read in some sections for gng back frm cm12,shuld go from philz recovery,i did that.but unfortunately after installation of that rom my phn is showing only lg logo.i did hard reset by holding power down+home button+lock button.after that im getting a recovery loop.then i decided to flash a stock rom using lg flash tool.but in download mode its showing error in connection between cellphone and pc even though the usb cable was good.so now i got struck.please anyone solve my problem,with a detail procedure.ill be very thankful to u..please help me...