my z ultra suddenly turned itself off again...

[jogsoriano]

Its the 3rd time..the last two incident i hav some1 who turned it on but having a hard tym turning it on..on the 3rd tym it happened i just pressed the power button and the up volume at the same time and it vibrated 3 times then after a few seconds i manage to turn the phone on...what does pressing the power button and up volume do?? Just want to know..thanks guys

[Uliwooly]

Repair your phone with SUS or PCC

Update Service (SUS)

PC Companion (PCC)

Bridge (for Mac)

Alternatives on How to backup Xperias

http://talk.sonymobile.com/thread/36355

[jogsoriano]

Repair my phone?? Just wamt to ask sir what do u think is the problem causing this?? My firmware is 532..thanks

[gaza1010]

I'm getting the same thing... But I'm not sure if it's exactly the same problem as yours, but I get a random reboot once in while (like every few days)... i haven't been able to find any answers either... does yours do that? I haven't repaired or factory reset mines yet because i can live with this so far (who knows how much longer I'll last though)... and my "Optimize backlight" and "Adapt to lighting conditions" are both unchecked from my display options... those were the only recommendations I got from people and I'm still getting the same random rebootings so I'm guessing this is a bug/glitch Sony needs/hasn't fixed yet?

[tommo123 · Accepted solution]

i had this for the 1st time today (owned about a week).  wouldn't turn on the screen. holding power did nothing, power and vol- did nothing, vol+ and powered made it wake up/reboot whatever.

[JoeYap]

Hey guys,

I not sure where u get the idea uncheck the 'Optimized Backlight' option.  But in my experience, that option must be on, it cause the SOD (soft hang) that make the screen cant wake up.  Also cause random reboot, and with very long boot up time.  Event it is booted, backlight cant be control and drain battery.

I have try this to fix it and it work for me. no reboot, no SOD and things any more since i do it 2 weeks ago. not rebooted my phone since then:-

1. Update to the new firmware 532.

2. Do a repair that will erase all data and fresh installation of the firmware using pc companion. (suggested by Sony)

3. Turn ON the 'Optimized backlight', and (auto backlight option will not affect at all)

I hope it can help you guys. at least i did help some of my friend with this and it prove working here.  Wish it help you guys too.

note: I did try to reproduce problem after that by turn Off Optimized backlight sometime but it not causing reboot any more or SOD just yet.  And if it dose, you will get long boot up, but you can just have to wait till it booted and On the option and must reboot it to back to normal.

[jogsoriano]

Wat do u mean by "reboot" gaza1010?? Mine just died on 3 occasions..the first 2 it took some time to turn it on..on the third time it happend,i tried the power and volume up press..it worked..after my fone vibrated 3 times i pressed the power button and it turned on...just updated to 532 firmware..my optimized backlight was checked..

[gaza1010]

once in a while my phone just restarts/resets by itself... happened to me couple of times but I haven't tried what JoeYap has recommended. My phone is at build .532 and it's still happening to me so I may have to give it a shot at what JoeYap has mentioned. Hopefully the next update will fix this without me having to reset/repair everything, but apparently the update hasn't reached me yet so I'll just have to wait and see.

[JoeYap]

Ya. what you experiences are much look the same i had last time.  Die, reboot, long boot up etc. Let just say that i just do not have it any more now. 

[JoeYap]

Let hope the new one fix all major issue.  What i did was just a work around that help make the phone usable.