Xperia Z3 stuck in startup loop?

[manmix]

Hi guys,

When I went to bed last night my Z3 was working fine. When I woke up, any app I opened closed with the "___________ has stopped" message, so I decided to reset my phone. Now it's stuck in a loop where it will turn on until it gets to the loading page with the blue wave background before turning off and starting this again and again until I hit the little reset square by the microsd with a paperclip.

I've tried connecting it to PC companion and the Mac version (I have a mac at home but can access PCs.) Once it gets to the part where I have to hold the power button and down key while plugging it into the computer, it does nothing and I can't move forward.

I can't seem to put it into flash mode, and I tried installing the EMMA flasher program but it wouldn't recognize that my phone was connected. After more googling seems that maybe unfortunately my phone needs to be in flash mode for this to work.

I haven't modded my phone, haven't installed many apps, and I actually know nothing about phone dealing with/ programming/ booting/ computer language words so some things I am reading online definitely go over my head. I am willing to try though!

My phone will still charge though! (Yayy.....)

I really have no idea what to do. My phone is important to my job and I've already budgeted to the max for this month so buying another isn't an option. It really **bleep** that this happened all of a sudden without warning.

Any help is appreciated, thanks.

[Uliwooly]

@manmix

remove both SIM and SD cards and check again

[manmix]

Thank-you for your reply!

Unfortunately, that is making no difference.

[Uliwooly]

@manmix

charge your phone 100% and then try again with PCC, the phone has to be remain off. 

[manmix]

Thanks again @uliwooly !

However, the phone is at 100% and still won't connect to PCC, with or without the sim card.

[Uliwooly]

@manmix

Does the phone charge when you connect the phone to the computer? try different USB ports.

[CameronT]

Hi manmix,

Welcome to the community!

To elaborate on what uliwooly has been saying, make sure the phone is completely off by holding the power button and the volume down button to force it to completely shut down, and then run through the software repair process HERE.

The computer won't be able to detect a phone that isn't turned on, but double check that the charging LED is coming on when you connect it to your computer. Remember to unplug it when you start the software repair process though.

[manmix]

@uliwooly Thanks again for your help! I can tell that the phone is charging when I plug it into my computer because the LED turns on.

and @CameronT woah! That's a really detailed guide, I like it! However I get stuck at step 10 (even when holding power + up until it vibrates 3 times to make sure it's off) 

[CameronT]

@manmix

On step 10 you only need to hold the volume down key as you connect it. You continue to hold it until the screen on PC companion changes.

When you do this, is PC Companion not detecting that you've connected anything (i.e nothing on screen is changing)? And is your phone completely off as you do this process?

[manmix]

@ CameronT

It won't detect my phone at all when I hold the volume down as I plug it in. Even holding it for a few minutes. If I let go of the down button while it is plugged in, it still does not detect my phone/ no LED comes on. If I plug it in right after, the LED lights up saying it is charging, however it does not recognize that my phone is connected in Sony Bridge. (I am at home now and therefore am on a mac).

Thanks.