yashsingh1/xdaforums huggingface dataset:
[Android Head-Units] pedalquickly:
Touch Screen Stopped Working

My unit has worked great until yesterday. When the unit booted, it loaded the radio app and then went to a black screen. The screen is unresponsive to any touches. I could use the back button and get the radio app one the screen again. Sound and every thing works fine, just no touch screen. I hooked a mouse up to it and all functions work fine..just no touch screen. I update the firmware and MCU, and nothing helps.

Is there a ribbon cable that attaches that may have come loose? Any suggestions? I can still use it, I just have to use a mouse.

Thanks!
[Android Head-Units] shadowmike:
What files did you use to update.

What did you update to ?

What model do you have , pic ?

sent with HTC ONE M8

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[Android Head-Units] roystervi:
shadowmike remember when I was tackling my BT problem? well I did a full factory restore, since then all of my web vid, like youtube and inside the browser stop working only a green screen but audio. also I install XBMC and the vid not showing. all I am seeing a green screen no vid but audio. have you or anyone else ran across this problem thet can help me out?

thanks in advance to all
[Android Head-Units] shadowmike:
Usually it's because of a hardware acceleration, or video codecs missing

I also have green video in xbmc, we need to read back earlier, I believe we had these problems earlier in the year. I don't remember a fix. I remember YouTube having the issue in the past.

I used to see customers with those Pioneer units and then show them the an21 they were amazed lol. Other units are like having 3 fingers taped together and going throughout you day normally

sent with HTC ONE M8

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[Android Head-Units] pedalquickly:
It was working fine and the next time I started my car is when the screen stopped. That is when I tried to update the firmware. i used the 2.8.8 firmware and took the MCU to an older version that I had used before 4.2.5-1-10-2101 and that didn't help, so to it back to 4.2.13-1-10-2101 that was on it when it stopped working.. I also went into the developer portion to show screen touches and it's not seeing anything.. hoping for something loose??
[Android Head-Units] shadowmike:
Ah, then you might want to look into the hardware thread, depending on your car, location, air quality, you could have some issues inside.

The only recommendation I could give is try to check out the boards and connections for any corrosion

sent with HTC ONE M8

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---------- Post added at 09:43 PM ---------- Previous post was at 09:23 PM ----------

I'm slowly going through the apks, but this is interesting for some users with radar.

So as long as your car sends the correct signals then you should see it on the screen.

sent with HTC ONE M8

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[Android Head-Units] Ackms421:
I have the newer unit with the single silver knob on the right. I still do not understand how to update. I copied the two files for 2.8.8 to the root of two different sd cards and chose system update from the menu of the radio. It says update start and update end. What am I missing?
[Android Head-Units] shadowmike:
What size sd cards ?

sent with HTC ONE M8

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[Android Head-Units] Ackms421:
8 GB, both of them. Am I putting the files in the right place? Is it possible to copy the files to a local location to update?
[Android Head-Units] shadowmike:
I've never attempted to copy the files to internal, but when I restore my unit to factory it uses the files in / cache

I suggest trying another memory card, or backing up your files and formatting one.

As long as the files are not in any folder it should work.

sent with HTC ONE M8

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[Android Head-Units] Ackms421:
I already did format one card and try. Do I need to enter the pin # on the stereo and choose update that way instead? I feel like I am unclear on what exactly should take place.
[Android Head-Units] shadowmike:
In a nutshell.

Put the 2 system update files on your memory card

Put the sd card in your radio

Go to settings, General settings and press system update.

It will ask if you want to update and you say yes.

It reboots, updates the radio and your on 2.8.8

What mcu do you have, what's your current version ?

sent with HTC ONE M8

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[Android Head-Units] shadowmike:
I'm glad that worked. I was going to try later.

As for xbmc I'm not sure. There are older versions. This one is the newest version.

I just wish I could zoom in the ui on xbmc like you can on the actual original xbox xbmc.

sent with HTC ONE M8

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[Android Head-Units] striker1211:
Has anyone gotten "root live dmesg boot" or similar to work on this device? I would like to have the output of the kernel log be displayed during boot rather than the android guy. I am afraid to use the app for fear of bricking the unit. Thanks.
[Android Head-Units] shadowmike:
Can you upload it ? I can not get it from market on my phone.

Edit I had to find the 2 year old app in other ways.

It works on my phone Which is 4.4.4 so it should work on the radio. I'll test it out later.

sent with HTC ONE M8

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[Android Head-Units] shadowmike:
Readout

http://developer.android.com/guide/appendix/media-formats.html

sent with HTC ONE M8

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[Android Head-Units] wanxu:
Any way iPod player show covers like mp3? I had WinCe Radios that did that...

By the way, do you know any version newer than 2.8.2 with 1024x600?
[Android Head-Units] kaween:
There's a broad ribbon cable going from screen to the mcu board. It is not impossible that it either got unlocked but it's also possible the ribbon cable itself got nicked at the contacts themselves. What I mean is : the part of the ribbon cable that actually makes the electrical contact can get damaged pretty easily when it is inserted, effectivly "bending the conductive strip backwards". It is not impossible for such a bad contact to work for some time and still give up on you later. On my unit, there are 3 cables running from the screen assembly to the MCU board : one is for the front-USB port, one's for the SD-card reader, and the broad one does _everything else_ (screen, buttons, mic, ....)

I've had this happening on my own AN21 too once, resulting in "no screen what so ever".

Carefully remove the screen assembly (depending on what type of unit you have, this may be as simple as loosening 2 screws on either side of the screen assembly) and check out the contacts of the ribbon cable going to the MCU board and to the screen. They should be perfectly straight and lined-up. If not, you can flatted the curled contact and very carefully re-insert it into the connector.

Look at the generic disassembly guide I wrote for our units. : http://xdaforums.com/showthread.php?p=55449765&highlight=waranty#post55449765
[Android Head-Units] pedalquickly:
Thanks! I check it out and give some feedback (hopefully positive).:good:
[Android Head-Units] p64imp:
Hi guys,

Some time back in Feb/march 2013 i was quite active in this thread. With your assistance on this thread i was guided in to purchasing this unit from alibaba:

http://www.aliexpress.com/item/Andr...er-GPS-Navigation-audio-Radio/1570938341.html

I was driving in to work this morning and listening to a MP3 on the android car unit and the music froze. i looked down and white lines started to form across the screen. I hastily turned off the unit, and after a minute turned it back on. The same thing happened immediately during the android boot screen. I then turned the unit off, left it off for about 10 minutes, then turned it on again. It went to the home screen, and just as it was loading the icons up it froze again with the same lines forming across the screen. I turned it off again quickly. When i got to work 15 min later, i turned my car off and back on, then tried the unit again to the same result... home screen not fully loaded with lines across the screen. Is my unit going bad? What can i do? What is happening to it?? I had my car in the shop for a minor repair... could it be something the mechanics did to my car that triggered this? I JUST got it back from them Friday and this was the first time driving it since i got it back with the stereo playing. They repaired the front bumper... one thing to note is that when i got my car back they had enabled valet mode under the dash, so i had to bring it back to them to disable valet mode on my alarm. This would have involved reaching under the dash with the wiring. i wonder if they knocked something loose?

I can't tell you how bummed i am right now!!!! Any advice/guidance will be hugely appreciated!
[Android Head-Units] shadowmike:
What type of climate do you live in ?

How close is your radio to your heater vents inside the dash ?

Have you attempted a software update ?

sent with HTC ONE M8

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[Android Head-Units] p64imp:
Hi Shadowmike, thanks for the reply!

I live in sunny san diego. Nothing should have caused an issue there.

I've not used my heater in about a year, so it can't be that. It is also not close to the vents or air ways behind the dash. I had my air conditioning on cold this morning.

No, i have not attempted a software update. It was working perfectly as-is for the past 8 months. Just after i take it in for service, blammo. =(

What does it sound like given my symptoms? Is my unit toast?
[Android Head-Units] chris.r.r:
After a while something new from my side:

I modded the system apps of 2.8.7 to look a bit more like Google's "material design" to harmonize better with current apps. In my opinion the chinese developers tend to add to much of everything, especially glossy buttons :D

Anyway, here is the SystemUI with a thinner status bar without buttons and with white icons + text:

Radio app:

I actually like the layout of the Radio app.

Moreover, I modified the smali code so that the radiotext always appears centered (that annoyed me a lot ;) ):

The Equalizer:

And the Phone app:

View attachment 3020346

If someone is interested in the APKs, find them attached. Simply copy the files into system/app and get the permissions right (or use RootBrowser for copying).

BTW: Does anyone have the link to the post which described how to modify the phone app to display the contacts in alphabetical order? I know that there was a post in this thread, because I did that once (I think it was written by Nikko). However, I wasn't able to find the post with the forum search.
[Android Head-Units] p64imp:
Well i just went out on my lunch break to test out my stereo. It has had about 4 hours to rest. I was able to fully boot the stereo, launch root browser, and get in to the extsdcard before it froze again (screen freeze and slow vertical lines and whiteness appearing over the screen). - i was trying ot back up the unit. wasnt able to do much at all before it froze. I then powered it off right away, waited a min and powered it back up 5 more times, these repeated tests immediately froze up. It seems heat related???

I called my collision repair center back (once again, this issue started immediately after i got it back from repair) and they told me they would send it out to a stereo repair shop to determine the issue. They told me that if it was determined to not be fault of the accident or of their technicians, that i would be responsible for the full diagnostic fee which would be about $100.

what should i do??? =((
[Android Head-Units] p64imp:
wow kaween, after reading your post this is the first hope i felt all day. First off, holy cow thank you for that response! I must say this is one of the very few forums where the members spend a good amount of time helping each other in the community. For that I can't say thank you enough!

Thanks for giving me a solid place to start. All of those items in your list sound reasonable to me. I did look at that dis assembly post you did outlining the attachment of a heat sink on another AN-21 unit. I'm not foreign to hardware mods and repairs so with some technical guidance I'm sure i could work it out myself. I will do a little testing with the radio this evening after i get off work and will report back my findings. I am afraid of running the unit too long after it starts freezing up for fear I'll overheat a chip beyond repair, but after 4 hours of rest i should be able to full boot it and switch it over to the radio to see if it keeps going on after the lock up. I always have it in DVD mode without a DVD so it boots directly to the dash, so I'll have to cross my fingers and hope it lets me fully boot again with enough time to hit the radio before i get a hard lock.

I will report back to you with what i find. I also appreciate your explanation of the board, and some likelihood of a collision causing issues. This is exactly the sort of thing i need to relay to the stereo repair shop i take it to for a diagnostic to be sure they don't just look at hot/ground and say "its tip-top shape where the accident is related". That's just the sort of thing that will kill me in a claim through AAA.

Could it be UN-related to the accident? perhaps, but this is far far to coincidental to have stopped working right after this repair after a 8 month flawless track record!

Thanks again!!! :)
[Android Head-Units] kaween:
Heh. I occasionally try to help people when not complaining about the absurdity of missing or badly-implemented features of our units. :) *cough radio Text cough*

Yes it could. As I tried to explain, the thermal design of most of these droid units is only so-and-do. No strike that. It's BAD.

Consider this from a manufacturers' point of view : these units are build dirt-cheap, many of them will be replaced by better units as time progresses just BECAUSE this is a non-broad-public item. I don't see my father or my neighboor run to a store and demanding an Android Car unit to play around with Torque, Pandora, VPN's,.... they simply want a unit that works when you push the "on" button. If you tell them they actually have to wait for a boot-cycle to complete, they'll ask why "it has to warm up as this kind of behavior went out when transistors replaced tubes in radios". :D

These units are not meant to last forever. And most of them don't need to as they are run to the point of obsoletion, not of electronics failure.

Mine gave up after 2 months. And a hot summer. Result : non booting, white screen of death, crashing while navigating, only to be revived after a serious cool-down time (in a fridge, really).

It may very well be connected to your car crash, but unless you find a smoking gun when opening the unit (PCB damage of some sort), there's no way to know for sure and it may just as well be a stupid cold joint. More likely, a so-and-so cold joint got "rocked" during the accident. But this is all just speculation on my part, no way to be sure.

Be sure however to make a picture of your PCB when you'd open it. Might come in handy later down the road.

Good luck, and fingers crossed.
[Android Head-Units] p64imp:
thanks again kaween! i really can't thank you enough for your thorough and time-spent replies! I'll keep you posted!
[Android Head-Units] pedalquickly:
Hi Shadow Mike,, I checked the larger ribbon by removing and replacing it.. everything looks good, but still no touch screen. it is a shame as I really liked the radio and being able to make it look the way i wanted, but it may be too much of a pain controlling it with a mouse. What do you think it might be worth if i wanted to get rid of it?
[Android Head-Units] djblaze852002:
This happened to me as well when listening to a CD. I was able to easily fix it by pressing the reset button. It is located in the top left corner of the unit. It is a small pin hole with the letters rst (i think) next to it. Use a paperclip to press it and reset the unit. This is not a factory reset. I did not lose any settings or data. It just seems to do a hard reset, power down and power back up. It has been fine ever since.
[Android Head-Units] hamid_valad:
i think i'm gonna have bad news. we had the same issue in my country. after a while your screen is gonna be totally white, if i recall correctly.

and the dealer said it's dead!

a repairer told me that its because of the fan, not starting and the device getting hot. (he whispered this in my ear so not sure if it's true or not.)

since then, i set my fan to start always.

i hope that your case is different from what we had here.

edit: i answered before reading keween's answer. sorry for giving this armature answer! (compared to his!)

ps. no lock in source. i'm getting disappointed in my self! :(
[Android Head-Units] kaween:
At the risk of stating the obvious, "have you tried resetting it" ? (pinhole reset switch)

No, really. The MCU and display controller can get "out of touch" too. A full reset might just do the trick.
[Android Head-Units] wanxu:
I have a 1024x600 unit, I asked the manufacturer for an update, and he sent me this 2.8.8 link: https://yadi.sk/d/PQ2mHo0Pcmrtc

Can someone add it to the yandex shared folder?
[Android Head-Units] p64imp:
Hi Kaween,

So i tested it out last night. I switched over to radio and let it play for 2 mins, then the freeze lock hit me again. The nobs worked and the radio continued to play. Looks like the MCU is fine. The screen did the same thing on the radio UI, frozen and vertical lines appearing.

So does this mean its related to the android board then? Would doing the paperclip reset button trick work for me like somebody else suggested? Seems to me like that is very doubtful as it happens on every single reboot once it seems the unit starts to heat up.

Could it also be the fan? I have not pulled the unit out yet to check that the rear fan is spinning on power up. I'm going to leave this for the diagnostic center. I have an appointment this Saturday with a local stereo shop.
[Android Head-Units] shadowmike:
Kaween also said to try the reset button.

You can hear the fan running if it's turning on.

sent with HTC ONE M8

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---------- Post added at 01:19 PM ---------- Previous post was at 01:16 PM ----------

Updating an an21-U Android head unit.: http://youtu.be/W_uulRn83fo

Rooting an21-U: http://youtu.be/WdJICZ7MiBs

sent with HTC ONE M8

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[Android Head-Units] p64imp:
sorry i missed that! I will give it a shot on my lunch break. I would be blow away if that actually fixes the issue.

i'll listen carefully for the fan. I don't recall hearing it come on ever...

---------- Post added at 06:58 PM ---------- Previous post was at 06:25 PM ----------

Was too impatient... had to go out and test. So i hit the reset button like 4 times. Every single reboot instantly went back to the frozen locked screen. Interesting as before it took at least several seconds to hit the freeze. now it is almost instant...

I also listened for the fan, but i believe its too quiet to hear inside my dash. I would probably have to pull the unit out to inspect it physically to confirm that the fan is not spinning.

What next?
[Android Head-Units] shadowmike:
Well, it's not that quiet. With your car off you should here it kick on.

An21u fan: http://youtu.be/obOYkZHXs3U

I've never been inside one of these units, so I can't help to much with your next steps.

Other than, if the shop your going to take it to is charging to LOOK at it.

And worst case you have to buy a board for them to put in. And then they will charge to install it. It may be cheaper to buy a new unit, with no $ extras.

sent with HTC ONE M8

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---------- Post added at 02:15 PM ---------- Previous post was at 02:03 PM ----------

Done.

https://yadi.sk/d/m_o7qyVFcnoE8

I also found some newer maps, those are in the maps folder on yandex

sent with HTC ONE M8

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[Android Head-Units] p64imp:
Hi Shadowmike,

Only reason why i'm paying for the diagnostic is to get proof that this damage is accident related. If it is, then it will be covered 100% by my insurance company.

I'm sure i could install a new board myself. How much do these replacement boards run for, and do they house the memory for the unit? (aka, once repalced, will i have to totally re-set up the system from scratch?)

I remember setting this unit up was a real PITA... google market apk so it would stop disconnecting from the marketplace, locating manual apk installers because my unit was not recognized as supported for most apps, etc. I'd like to prevent having to go through that setup process if at all possible.

Oh gosh how i wish i had backed up the system before this happened.
[Android Head-Units] shadowmike:
Good luck on that insurance claim... Considering there's no other problems with your car.

As for the setup, 2.8.8 comes with an apk installer. Takes me roughly 10 minutes to be up and running from a full stock upgrade.

sent with HTC ONE M8

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