[Nexus 4 Q&A, Help & Troubleshooting] AsamiyaL:
Hi,

I am sorry if it's a repetition of something that has already been posted but after a search, I didn't find anything that could answer to my question.

My nexus 4 suddenly got a lot of android errors (like ".com.google.android.something" stopped to work and press ok - the something was something related to the OS of the phone, I don't think it's the first time I've seen it but if I've elready seen it, I usually press ok which lock the phone, I unlock it and it's fine) like 20 times or more and decided to switch off the phone after that because the error messages didn't stop to occur each time I press ok.

I wanted to switch on the phone but it never boots, it stays at the 4 coloured circles that mix to become white and separate and mixing again, etc.

I left it like that for several hours after trying to switch it off an on several times, nothing changes. When I start it on recovery mode, I have the android on the back with a exclamation mark on the red triangle.

I tried to restart bootloader and to start it like that, same result. I tried to wipe the cache and even to do a hard reset, nothing changed. I think the phone wiped data but failed to restart, having errors like (after wipping the cache) :

"E:failed to mount/cache (invalid argument)

E: can't mount / cache / recovery / log

E: can't mount / cache / recovery / log

E: can't mount / cache (invalid argument)

E: can't mount / cache / recovery / last_log

E: can't mount / cache / recovery / last_log

E: can't mount / cache (invalid argument)

E: can't mount / cache / recovery / last_install

E: can't mount / cache / recovery / last_install

Cache wipe complete [Yeeees !!]

E: can't mount / cache / recovery / log

E: can't mount / cache / recovery / log

E: can't mount / cache (invalid argument)

E: can't mount / cache / recovery / last_log

E: can't mount / cache / recovery / last_log

E: can't mount / cache (invalid argument)

E: can't mount / cache / recovery / last_install

E: can't mount / cache / recovery / last_install

E: can't mount / cache (invalid argument) "

And when doing a hard reset, I get the same errors (I read and I didn't find something different but I may have missed something), obviously without the "Cache wipe complete".

I looked online and saw I could do some things using a toolkit but my phone is not recognized by my computer (I tried on several computers and it's not recognized, even by computers which used to recognize it as a phone !). But when I go to "devices and printers", the phone is recognized as "Nexus 4" but the computer considers it at a medi player (??) and says it works properly but I can't access to anything on it (it only appears there, not a storage device).

I tried to intall drivers but when I plug the phone after having intalled them, it's still not recognized. Plus, I don't think the USB debugging thing is authorized in my phone (and I can change that since I can't start the phone) and even if I do the manipulations with the phone allowing it to start as fastboot mode to be recognized by the toolkit, the toolkit still doesn't find it. The device manager doesn't find my phone (says the device doesn't work properly) and installing the drivers manually (looking manually for the folder where they are) doesn't work either.

I am stuck with my phone that doesn't start, the hard reset doesn't seem to work and I can't do anythink using any toolkit or so since any attempt I tried for the phone to be recognized by the computer didn't work.

I am a newbie about android and doing stuff with the computer (I read some useful guides about how everything works, etc. and that's why I tried to use a toolkit, at first to do a hard reset from the toolkit ot use a image of the phone to be like a brand new one) so I may have missed something. Could someone suggest me something to do and maybe know why the phone isn't recognized by computers ?

Many thanks for your help anyone could provide. Plus I'm looking for a job and doing that without a phone is just THE HELL.