Camera freezing/not starting, "Multimedia" draining the battery, SD card and accelerometer faults

Question

Hello.
Right now my Z1C is running on KitKat, but problems with my Xperia's software I'm about to describe are with it probably since Android 4.3. Don't know whether are they only in my device or even common.
1) Camera sometimes freezes while taking a shot. The photo is lost and I have to lock then unlock the device (with side button) and throw the Camera app away recent apps (available under the third softkey).
There were even 3 or 4 situations when I clicked the camera button and after 15 secs of seeing the black screen, phone stated that camera isn't accessible.
2) The multimedia process is constantly running in the background. It happens rather rarely, but for few days in a row and drains battery a lot. In example, while I'm now looking at the power manager -> battery use it says I'm running 13 hours on battery while there's only 73% left. 53% power has been eaten just by this Multimedia process! "Idling" has taken only 12% and the screen - only 10% while these 3 are the most power-consuming processes.
I've got a lot of music on the SD card, but it's been taken out for the whole night (these 13 hours till now). There are only few apps, few videos and more pics on the internal memory (both of the last taken with this device - I save it on the internal mem).
In my opinion it's not my SD card which is faulty if even without it the phone doesn't work properly. Yeah, I did the reboots; with SD card inside it's still in here.
3) SD card sometimes just "removes itself" and is found again in a second. Windows 7&8.1 have never had any troubles with it (even right now, after I've run default Windows app to check the card for any errors), whatever the filesystem has it had. Contact pins aren't worn out as this card has been mostly sitting in this phone.
4) Accelerometer won't work in [Sony's] Album and Chrome apps. It has been happening for a few days so far.
I've reset the device twice and flushed the caches 2 or 3 times so far. I've got this phone new in less than 2 months, have never installed any suspicious app nor modify anything, it has never had any contact with moisture, it has never fallen... I don't get it, it's going so wrong. I'm disappointed. Will Sony replace it with new one? Are these all soft bugs or why does this happen?
Solved!
Go to Solution.

Answer 1

Hi and welcome to the community! Since you're new please be sure that you have checked out our Discussion guidelines.
I suggest that you try to repair the phone software using PC Companion..
Before repairing your device you may want to backup your information first. Check out this topic for more information on how to.
How to backup?
If the issue should still remain I think that this needs to be examined and fixed at a repair center. For more information about how to submit your phone for repair and where, contact your local support team.
 - Official Sony Xperia Support Staff
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