Xperia Z5 auto reboot

[Von]

My Z5 auto reboot itself, any suggestions on how to fix this? Im done doing Factory Reset, Safe Mode, Software Repair and 3times on bringing my phone to the Service Center. Im sick and tired on Sony's service centres, they cant even fix a single problem. I've been a loyal consumer to Sony, and their appliances and gadgets. Still, I've been really disappointed about this problem.

[Bhonder]

Maybe it is some internal false contact.

Are you using some optimization software with a programmed reboot? Samsung, for example, has something similar.

[Von]

No, I did not.

[MarlonUk1]

unfortunately we can not advise any help, as you have already done what could have been done, a software repair using Xperia Companion would have the last resort before sending your device to your Local support. did you ask them what repairs they did?

does this happen when you have no apps installed?

[D_Milly]

I have exactly the same problem. I had sent the handset to the service centre and the problem began again immediatley.

It crashes and reboots about three times a day. In diagnostics it says I have had 27 system failures in the last 10 days with out any explanations. 

I have not been able to do a repair with Xperia Companion and the software repaire option never get past initisation without failing.