Nexus 4 stops suddenly

My Google Nexus 4 which was working without issue suddenly began stopping at random times. After few boot ups OS didn't bootup where I had to factory reset wipe from recovery mode. But suddon stopping issue still persisted. Soon it came to a situation where factory reset could n't recover at which case I tried installing Synagenmode. I could not install Synagenmode for some reason. There after I flash factory Nexus 4 ROM again. Still the sudden stopping issue exist when phone is discoonected from charging cable. Phone works fine when connected with main power.
The battery is not empty though it stopped suddenly, I am saying this because I can boot it up again though it stops again before fully bootup. Is this a hardware failure or software faikure such as battery cache

Volume Keys Stops Video playback

Hi guys,
I had this problem with my z1 which was hard bricked. But I have this now on my z2 and it drives me crazy.

Whenever I try to volume down when I watch a video or playing a game or on many apks, it stops the video. It's obviously caused by an apk but I don't know which one. I'm in safe mode now. I played a video on YouTube apk and the problem is gone. I factory resetted my phone two days ago. I'm on 5.1.1.

Do you have any idea what the issue could be?

Top part of screen stops responding to touch occasionally

After a while the top part of my screen will completely stop responding to touch. I can't pull down the notification area or press anything on the upper portion of the phone. After, I reboot it works for about 30 seconds and then the top part of the screen will stop working again. The only thing that will fix it is to wait it out. Maybe a few hours later it will start working again. Then a couple days later and the same thing happens. I think maybe my phone is overheating from some app or something and then it causes this to happen for some reason. That would I guess explain why it starts working after while, because the phone had a chance to cool off

Anybody else experience this?

Video stops but audio still plays...s4

I have an s4 running a Google edition custom rom. It's 5.0.1 and has been just fine since I installed the from for maybe almost 2 months now. Recently it has developed a video problem where the video stops about a minute in but the audio still plays. This happens on the local player and streaming apps too. I have searched the web for answers and it seems many ppl have this issue and is not limited to s4 models. The only way to resolve it is a full wipe, but after a few days the problem comes back. Has anyone heard of this and what I can possibly do to stop it. I have tried clearing caches in all settings and gradually uninstalling recent apps but just can't get to the bottom of it. It's sooooooo annoying

Music stops at random times Lollipop 5.0

Hi all. I've been having a problem with my phone where audio cuts out through the Music app at random times. I can play music through Soundcloud and Mixcloud and Songza and Youtube and Digitally Imported without a problem. I've cleared the data many times on both the Google Play Music and Music applications through the Application Manager. I also tried uninstalling the updates for Google Play Music and still no go. I started to think that it may be just my microSD card, so I tried playing music off my HAM2's memory, with my microSD card ejected, and I still get music stopping at random times. I think I kind of narrowed it down to the Music application, I'm not too sure though. Any help would be awesome.. Perhaps anybody with the same problem? Oh and by the way I had a HAM2 variant and I did the conversion in order to get Lollipop. Other then this problem I don't seem to have any other issues.