Nexus 4 won't charge or boot (red light)
I am having the same problem, with no red light when charging a nexus 4.
I changed the usb cable and it charged.

The problem came back however. I just noticed that if I held down the buttons while inserting the cable, the red light came back on.

After a while, it started blinking, and charged fully.

I use my nexus4 for development, so it is on for days even weeks in a row, which is not good for the battery.

Also most computer usb sockets dont provide half the current that a dedicated usb charger does, and that is what flattened the battery.

It would be nice if I could bypass the battery completely, since this one is always tethered to the workstation.