Nexus 5 showing black screen
1.Can access fastboot mode
2.Cannot access recovery mode from fastboot : shows google logo and black screen (no inverted android)
3.When selecting Start from fastboot : only google logo appears and then black screen (not even the marshmallow boot animation)
Things Tried :
1.Phone was able to ring from android device manager. Tried erase from there. No response
2.Tried flashing the stock rom still no response.
What might be the issue ? Is the internal memory corrupted ?
UPDATE
The phone boots up able to hear screen shot sound but still black screen
UPDATE 2
The phone had hardware issue, the flex cable was damaged. Replaced the flex cable and phone is working again.