Do Lumias have Pover on Self Test Codes?

[Max Palmer]

I have a dead 930, I've swapped out the battery, tried charging, tried hard and soft resets, it won't boot. All it does is on powering vibrate 5 times in a row and then stops. I keep thinking this could be a POST diagnostic code, but can't find anything on the internet about POST codes for 930s or Lumias. Does anyone know if Lumias have POST codes, and if so what 5 vibrates in a row might mean? Would be nice to grab a few photos that weren't backed up off the phone...