[Android Head-Units] idlt:
Hi all

the text below is an email exchange between me and joying support. Besides the obvious language barrier I also don't think they are willing or able to do much troubleshooting. I was wondering if anyone here would be kind enough to point me to the right direction.

The problem basically has started after two or three unsuccessful root attempts that most likely left some script that I cannot erase with a factory reset. It could also be one of those very unlucky coincidences where the problem appeared then but rooting was not the cause.

It looks like the unit powers up normally after a period of complete inactivity that has to last at least a few hours and then everything is normal for about one hour. Then it shuts itself off again but will not restart for a few hrs. i didn't get a chance to troubleshoot further and provide detailed timing but I don't think its a heat issue as described elsewhere

After I rooted it successfully I installed the "joying extra tools" but was not really able to use the app.

any help would be appreciated

thanks

Hi I just installed my US-JY-UL135N2 a few weeks ago. It was working fine for a few days but had the same problems described in various posts.

I tried to install superSU in order to install a complete backup application (titanium backup) following the directions from this forum (cant post link yet) first couple of times I was unsuccessful (could not get permission to write the files). After that it started rebooting at random times and sometimes it wont wake up for a few hrs. A couples of days later I rebooted the unit and tried again to root and this it worked. The crashes did not stop so I did a factory reset from the settings menu. When that was completed I looked at the applications and superSU was still there and the crashes continue. I think that maybe some incomplete files have remained when I tried to root the first time. What else can I do? If I did a factory reset shouldn’t it wipe everything? Also should I upgrade from 5.1.1 to 6.0? how? Will that solve the problem?

Do you have support in the USA? Can I talk to someone here?

Dear friend,

Thanks for your email .

Do you mean that the head unit will be crashed after you download the backup application ?

we think that maybe the application is not much more compatible with our head unit .

could you try to directly unload the SuperSu app ? and then check whether it will still crashed ?

and could you show a video to us how it crash ? so that we can know more ?

Hope your positive reply and then we will help you .

Thanks

candy

Thanks

Candy

No I never got a chance to install the application. The unit is now dead it does not start at all so there is noting to show. Is there is a way to make it start? If there is I can uninstall the superSu and let you know if it helped but for now I can't do anything

Dear friend,

Thanks for your reply .

please noted :

You said that you have not installed the application , so how your head unit go dead ? we are a little confusing .

could you please explain what you have done before then the head unit go dead ?

because you also said the Supersu is there , if you have not installed it successfully , bow it will be there .

we hope your kindly reply then we can know that how to help you .

I Said I did not install the backup application (titanium backup) but i did install superSu.

I tried to root the unit but failed a couple of times. The third time I rooted it but then It started random crashes and reboots so I didn't get the chance to install anything else. Can you just tell me if there is a way to restart it or do I have to send it back for warranty repair?

hope you can have a try and feedback us .

Candy

Add joy to your car with Joying !

Because sometimes root also will make mess the head unit .

you can try to update the head unit and then check whether it will solve your problems .

here is the update link : sorry cant post links yet

please try to update (2017-7-7 )

please check whether it can update successfully .

Sent: Wednesday, August 09, 2017 7:03 AM

Subject: Re: US-JY-UL135N2 crashing and wont recover for hours.

Dear friend,

Thanks for your reply .

Sent: Wednesday, August 09, 2017 7:23 AM

To: 'Joying support'

Subject: RE: US-JY-UL135N2 crashing and wont recover for hours.

Hi

The unit came back on today by itself after about 15 hours. I uninstalled superSU and reset it again. I don’t know if its going to be stable this time but I will let you know in a few hours

The update you’re suggesting is 6.01 and I read that there is problems with it. Isn’t it better to stay with 5.1.1?

Where can I find the latest file for 5.1.1?

From: Joying support

----

Date: 8/9/17 11:38 PM (GMT-05:00)

Subject: Re: US-JY-UL135N2 crashing and won’t recover for hours.

Dear friend,

so we suggest that you go to update the system to android 6.0 .

because it will enter the recovery interface . please check whether it can .

Hope your try .

Thanks

Candy

Ok so I left the car off for a few hours and just tried it again. I turned the car on and the unit DID NOT TURN ON AGAIN. It just wakes up whenever it feels like it.

I can’t do anything to it until it turns on again. I there a way to reset it completely?

here is the blog on how to update the android 6.0 : sorry cant post links yet

(please update to 2017-7-7 )

you update the head unit according to the blog , then it will occurred the recovery interface .

Hope you can try .

Thanks

Candy

How do I make it enter recovery?

-------- Original message --------

Ok I just I did the update 2 hrs ago. Then I drove for about 40 minutes and shut off the car. Went back 20 minutes later and tried it and it turned on without problem. I just tried it again now and it won’t turn on. I don’t know what else to do at this point. Is there a way to get logs when it turns back on? It usually turns back on after 6-7 hours

From: Joying support

Sent: Thursday, August 10, 2017 6:25 AM

To: Spiro S

Subject: Re: US-JY-UL135N2 crashing and won’t recover for hours.

Dear friend,