No GPS after screen replacement - Xiaomi Mi 8 Questions & Answers

Hi,
As topic says, I have replaced the display with a new one (which came with a new frame as well), and after that, everything is working except the GPS. No signal at all.
As I was comparing the two frames, I found that there are contact points which are missing on the new (see attached picture).
Could this be the reason why the GPS not working?
I found a schematic for MI8 (here), and I found the connectors which are related to these contact points (J101, J106 and J104), but I don't know what to do with them...
Anyone has an idea how could this be solved?
Thanks,
Matt

Related

Breeze might have integrated GPS

For those who don't frequent the other forums: Breeze seems to share at least parts of the same GPS-capable hardware like Trinity and Hermes. With Trinity's GPS-enabled radio-ROM we can get an output of raw GPS data (although no usuable, complete data) that at least indicates that there is *something* going on inside Breeze... For the whole story see this thread over at the Hermes Upgrading-Forum:
http://forum.xda-developers.com/showthread.php?t=291181
TRJS said:
For those who don't frequent the other forums: Breeze seems to share at least parts of the same GPS-capable hardware like Trinity and Hermes. With Trinity's GPS-enabled radio-ROM we can get an output of raw GPS data (although no usuable, complete data) that at least indicates that there is *something* going on inside Breeze... For the whole story see this thread over at the Hermes Upgrading-Forum:
http://forum.xda-developers.com/showthread.php?t=291181
Click to expand...
Click to collapse
Yes, I can confirm presence of *something* outputing well-formed NMEA data in breeze. But I should as well confirm that that something seems to operate w/o antenna (or maybe metal case shield signal pretty good) 'cause after trying to get fix during half an hour (laying on windowsill) it hardly could see ("see", not "use") one or two sattelites. Yes, of course windowsill is not ideal place for testing gps but trinity laying 5cm nearby have got the fix in couple of minutes seeng 11 sattelites and using 4.
Just found out that there is a brand new ROM for P3600 that enabled the internal GPS receiver (as mentioned on www.qtek.fi). HTC sites still say nothing about this.
Could someone perhaps extract the GPS portion of the ROM and put it in Breeze?
unfortunately this is likely to be the same as the recent findings in the hermes, which the chip is hardware wired to not accept antennae and the satellites you see are noise... unless they match those of the trinity...

ANYONE with a BROKEN TILT

Hey there, looking for broken tilts, if you have one and want to get rid of it please contact me!
I got one.. The ribbon cable that connects the screen part to the keyboard is on its last leg..... I am not confidant in my abilities to install a new one... Cossmetically the phone is a 9 our of 10 (VERY good condition). Within a week, first he phone would imtermitionly read sims, now it reads none, then then the screen started to flicker and it lost the ability to read the SD card (it sees it but gets errors now).. Wifi, BT and GPS are still fine... Make me an offer.. I am located in Milwaukee WI USA
I got one too, check PMs.

HW Question: Purpose of tape on Tilt internal antenna cover (and effect on GPS)

Hi All,
Does the tape on the internal antenna cover have a functional purpose ?
It is the labelled tape on this component:
link
I assume "yes" because why else would they spend the $0.04 putting it there?
I ask because over the last two years, I've replaced the internal speaker and my LCD display. Everything works fine now, with the exception that the GPS has ceased working. It turns out that as part of my early curiosity and fumbling around, I pealed off the tape then re-applied it and there is a break in it now. Is the tape an RF shield or an antenna of some sort (i.e. is there a conductor in it), or is it just inert electrical tape ? Does it affect GPS reception? If it is inert, why is it there ?
At any rate, I've tried all the conventional solutions to GPS problems, including
the usual suspects: QuickGPS, turning off AGPS, hard-reset, clear view of sky
trying different radios and ROMs--probably 6 different radios and 4 different ROMs in different combinations
the HTC GPS Tool
throwing my phone against a wall*
I've searched this site and the entire net regarding the antenna cover & tape and haven't found anything ... Any insight ?
Thanks,
Guy
*haven't tried this option yet
Currently running (but have tried 6 Radios and 4 ROMs including OEM ROMs)
HARDSPL 3.29
ROM Version: 65Series WWE 04/30/09 (Phoenix III: Phx3.1.21815)
RAdio: 1.70.19.09
Protocol: 25.83.40.02H
I just set my tilt up exactly like yours and the gps didn't work by default. In each gps program I had to change it to use COM4 instead of the intermediate driver or default setup. Now all my GPS stuff works.
I would try what is mentioned above.. I have a LG Incite that was having the same problem... instead of a com port in the "External GPS Settings", under the GPS Program Port, it was set to "GPD7" instead of "Com4".. I changed that setting and it immediatly fixed the problem... Let us know if that works for you... My GPS went out on my tilt yesteday... and nothign fixed it except for a hard reset.. now it works fine again... Hopefully you won;t ahve to do that... Also, on a side note, I am using TomTom 7.45, as that one seems to work best with my Tilt without having to run any "Extra" programs to get the GPS to work....
Maybe not waiting long enough for WM 6.1 sat fix?
GuyIncognito said:
I ask because over the last two years, I've replaced the internal speaker and my LCD display. Everything works fine now, with the exception that the GPS has ceased working.
<snip>
Currently running (but have tried 6 Radios and 4 ROMs including OEM ROMs)
HARDSPL 3.29
ROM Version: 65Series WWE 04/30/09 (Phoenix III: Phx3.1.21815)
RAdio: 1.70.19.09
Protocol: 25.83.40.02H
Click to expand...
Click to collapse
If you've not tried GPS since upgrading to WM 6.1 then welcome to the effects of WM 6.1 ROMs (at least the HTC ones which take ages by comparison to get a satelite lock). The WM 6.0 HTC ROMs with early 1.27.xx.xx series radios seem to initialise the GPS circuitry with much more power resulting in better GPS performance so try a WM 6.0 ROM/Radio/SPL setup. If GPS still doesn't work as it should then yes the tape is relevant. Personally I'd get HTC to fit the new tape and see what diffrence it makes - I suspect it'll make a difference.
GPS operational after replacing antenna cover...
Guys,
I just wanted to post an update to the thread. I doubt this is a general solution to GPS problems, but it may help some folks who have the specific situation I had.
For my specific case, replacing the antenna cover plate fixed my problem: GPS had not worked for 6 months (OS sees the GPS device, but 0 satellites under all conditions), and it is now operational after replacing the cover. The GPS had ceased working after I replaced the speaker and LCD display. When replacing those items, I had partially destroyed the tape covering the internal GPS antennas.
So, to answer the questions in my original post,
1. Replacing the cover (link in post # 1) now gets me a fix, with 5-7 satellites in the open. This is at least as good as it was one year ago before I disassembled my device with wreckless abandon.
2. Further, I did some "destructive testing" of the cover I replaced, and the copper colored conductors on the bottom of the antenna cover are in fact attached to the "tape," so I infer that the tape is conductive and/or functions as an antenna, since those conductors make contact with the copper posts on the motherboard.
I will do more testing with time-to-fix and useage conditions, but for now I'm pleasantly surprised.
Note:
* I have not changed my ROM or radio since I originally posted, so the above results are "ceteris paribus" ...
* In the preceding 6 months, GPS has not worked on 20+ different combinations of ROM & radio, including WM6.0 ROMs...
Guy
Flying Kiwi said:
If you've not tried GPS since upgrading to WM 6.1 then welcome to the effects of WM 6.1 ROMs (at least the HTC ones which take ages by comparison to get a satelite lock).
Click to expand...
Click to collapse
I had that problem until yesterday when I switched to hard SPL 3.56 from 3.29. I can now get a GPS fix in under a minute.

GPS 'Hardware' on the Tilt

hi Guys,
i have been scouring the site and i have found lots of info on getting a quick fix on the GPS and which radios work best, i have downloaded lots of radios, tried different roms but no matter what i try, I cant get a fix PERIOD. i have also googled to try and find out if the GPS itself is a replaceable part on the tilt but no info seems to be available, having said that I would definately appreciate any input, i have tried stuff like GPSgate, GPSproxy, HTC GPS tool, GPSTest, VisualGPSce, QuickGPS, QuickPosition and NONE of those tools has shown me what a GPS fix looks like, I have seen up to 8 satellites on the HTC tool, they show up and dance around for about 1 or 2 minutes and then dissapear never to be seen again until after a reboot of the phone.
i have also borrowed a friends Tilt, and placed them side by side, and watched his phone get a fix in about 1 minute, and then stuck around for about 20 more minutes and then finally end the test in frustration.
is the GPS a replaceable part?
any input would be greatly appreciated
Phone: AT&T branded TILT
ROM:Ultimate-X2.V11.Premium (wm6.5)
RADIO:1.71.09.01
Protocol:25.75.40.02.eMoH
My advice to you would be to just keep trying to find a radio ROM that works for you. I recently got a Tilt, and I flashed some odd 5 or 6 radios before I found one that enabled WiFi and GPS for me. Ironically, its the one you are currently using xD.
illspamu said:
is the GPS a replaceable part
Click to expand...
Click to collapse
No but the antenna sticker (with fragile embedded tracks) is. That said, you mentioned you still get greyed out satelite details showing and changing in your nav software so that may not be an issue (you've not mentioned if this sticker above the battery bay has been disturbed at all). If you are worried about whether your new setup has contributed to the problem, the answer is simple, was it working OK before you changed the ROM/Radio or SPL from original WM 6.0?
Oh and welcome to the forum illspamu - I hope you don't live up to your name
illspamu - I hope you don't live up to your name[/QUOTE said:
@ashakur
thank you, havent given up I know there is a radio out there for me.
@Flying Kiwi
thanks
I am a total newb to this, so this info about the antena is something i need to check, it is worth mentioning that i did buy this tilt with a broken screen so someone probably used it for a hockey puck, its been a great phone minus the GPS but I recently became demanding and want to see it working.
the GPS has never worked beyond showing me some satelites for a couple of minutes and its been the same regardless of ROM/Radio.
about the handle, worry not, its amazing how an email address like that can keep spammers off
Click to expand...
Click to collapse
my apologies ashasaur for mispelling your name,

HTC Kaiser GPS NOT WORKING MAJOR PROBLEMS!

Hi my name is Mike. I am currently having a problem with my AT&T Tilt (8925)s GPS unit. I see the orange light at the top flashing but the phone is not recieving signal at all. I heard if you use HTC GPS Tool it will tell you if it works. I am using it right now and I am noticing all these messages rolling over the screen when I select COM4 4800:
$GPVTG,,T,,M,M,,K*4E
$GPGSV,1,1,00*79
$GPGGA,,,,,,0,,,,,,,,*66
$GPRMC,,V,,,,,,,,,,N*53
$GPGSA,A,1,,,,,,,,,,,,,,,,*32
repeated over and over again.
When I click the satellite tab nothing is found.
Also I am not sure if it matters that my keyboard is the old version and it claims to be a 8925 when it looks different in pictures online.
If anyone can help fix this problem I will pay $3 via paypal (IF ALLOWED BY MODS AND ADMINISTRATOR, OTHERWISE FORGET IT)
I found this on a website but I still dont understand why its doing that.
$GPGSV,1,1,00*79 = 0 Satellite Vechicles in view
$GPGGA,,,,,,0,,,,,,,,*66 = No GPS Fix data available
$GPRMC,,V,,,,,,,,,,N*53 = V in field 2 means navigation receiver warning (invalid position)
$GPGSA,A,1,,,,,,,,,,,,,,,,*32 ==> Automatic mode (3D/2D) & Fix not available
$GPVTG,,T,,M,,N,,K*4E = NO GPS data available
EDIT: I tried the GPS on Android 2.1 on the phone and still no connection at all.
I dont understand this.
Please help me!
Thanks,
Mike
I take it you have tried a soft and hard reset?
Are you outside when it is looking for Satellites? It can also take some time to get an initial lock on. Perhaps if you switch off the auto-off/powersaving part of the phone and go outside, set it on a wall and wait...and wait....and wait... and hopefully it will get a lock.
Good luck I recall years ago with a Garmin GPS that was Serial and not Parallel receiver it would take aaaaaaaages to get a lock on ie, up to 45 minutes! Usually after it was OK but even so!
Is this a factory rom?
Not Sure of your location... However when I experienced problems in the STATES it was usually the Radio I need to change... Plus having [QuickGPS] installed to help moved the GPS initialization along [Finding a satellite lock] For me about 2-5 Min on average, depending on location. Also not sure what you use for Navigation but I use TomTom and it's been problem free....
Good luck
jac said:
Not Sure of your location... However when I experienced problems in the STATES It's was usually the Radio I need to change... Plus having [QuickGPS] installed to help moved the GPS initialization along [Finding a satellite lock] For me about 2-5 Min on average, depending on location. Also not sure what you use for Navigation but I use TomTom and it's been problem free....
Good luck
Click to expand...
Click to collapse
Good advice.
Got one questions for you guys, are you using additional antennas or is there's a build-in one? My kaiser really sucks about gps, it hardly ever locks gps even outdoors. But got a solution: Get a cooper wire which fits into GPS antenna socket, cut about 5-5.5cm of it and stick it into the socket you can bend it so it won't disturb. Maybe you can stick it under the rear cover so it won't be visible.
With this short cooper wire i've got a steady gps lock even indoors.
Sorry for my bad english
msichal said:
Got one questions for you guys, are you using additional antennas or is there's a build-in one? My kaiser really sucks about gps, it hardly ever locks gps even outdoors. But got a solution: Get a cooper wire which fits into GPS antenna socket, cut about 5-5.5cm of it and stick it into the socket you can bend it so it won't disturb. Maybe you can stick it under the rear cover so it won't be visible.
With this short cooper wire i've got a steady gps lock even indoors.
Sorry for my bad english
Click to expand...
Click to collapse
Dear Msichal,
Could you please provide us with some pics ?
I have the same issue since I have open the phone to replace the SIM card reader :-(
Kind regards,
Nino
NinoFR said:
Dear Msichal,
Could you please provide us with some pics ?
I have the same issue since I have open the phone to replace the SIM card reader :-(
Kind regards,
Nino
Click to expand...
Click to collapse
Interesting that you bring up a half a year old post.
ChumleyEX said:
Interesting that you bring up a half a year old post.
Click to expand...
Click to collapse
Oh sorry
I have, finally, succeed in fixing my GPS issue
I have taken a short wire do a loop with it and plug it into the GPS external port.
I have sticked my cheap installation into the mobile back !
Please find enclosed two pics representing my installation... with a brief scheme!
Hope it helps.
Kind regards from France,
Nino
I think you guys should learn from http://forum.xda-developers.com/showthread.php?t=571266
for your gps program could work

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