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I changed touch screen and after that loose WIFI and BT signal
maybe antenna problem
nedko76 said:
I changed touch screen and after that loose WIFI and BT signal
maybe antenna problem
Click to expand...
Click to collapse
wow. I have buy a second hand device and I have the same problem. For sure my screen was changed. I have open the phone from the video here:
http://pocketnow.com/hardware-1/official-htc-hd2-disassembly-assembly-training-videos-leaked
...but nothing ((
Antena it's in up-left when you watch on phone.
I am almost sure at the left side directly under the volume button .
Robert A said:
wow. I have buy a second hand device and I have the same problem. For sure my screen was changed. I have open the phone from the video here:
http://pocketnow.com/hardware-1/official-htc-hd2-disassembly-assembly-training-videos-leaked
...but nothing ((
Antena it's in up-left when you watch on phone.
Click to expand...
Click to collapse
Those videos are awesome..I see myself disassembling my HD2 after couple years
Robert A said:
Antena it's in up-left when you watch on phone.
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Click to collapse
It won't be in the upper portion of the phone, as this increases the strength of the radation the head is exposed to. I believe there is a law prohibiting it from being too near to the skull. Which is why all antennas in modern phones are internal and not placed by the speaker at the top of the phone.
Although this seems to not apply to GPS, Bluetooth and Wi-Fi, which is what those wires by the speaker at the top of the phone are.
Class 1 Bluetooth devices can cause exposure to radiation similar to that emitted by a cell phone if they are operated in the immediate vicinity of
the body. Bluetooth devices are designed to limit the radiation power exactly to that actually required. When the
receiving device indicates that it is a few meters away, the transmitter immediately modifies its signal strength to
suit the exact range, which reduces the total emitted radiation and signal interference (IT'IS 2005).
A study commissioned by the Swiss Federal Office of Public Health (FOPH) measured SAR for several Bluetooth
devices, including two different class 3 hands-free cell phone headsets. The headsets tested had SAR values of
0.001 and 0.003 W/kg, which is 34 and 12 times lower than the SAR of the lowest-emission cell phone currently
available (Swiss Federal Office of Public Health 2009a).
The article can be found here.
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Click to collapse
The cell antenna is the strip on the bottom below the battery door,the wifi antenna is at the top right (if looking at it with the screen up),and the gps antenna is at the top left. There is a white cable that is supposed to run from the gps antenna to the bottom side of the main board,and a black shorter antenna cable that is for wifi that plugs into the top part of the board. I have a pretty strong feeling that the person that fixed your phones (whether that was you or someone else) probably didn't plug that cable in the right way.
<EDIT> By the way,if either of you want one that works the right way/for parts,I have one for sale that the volume buttons don't work and the lcd is cracked,but everything works other than the volume buttons.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270637114813&ssPageName=STRK:MESELX:IT </edit>
Anyone ever have any antenna issues without taking apart the phone? my phone just developed issues with dropping wifi unless im close to the router, im guessing an antenna cable is loose. and for those who have fixed the antenna issue, how hard was it?
according to the HD2 manual, the antenna is the bottom 1/5 of the phone
WiFi antenna in HD2
Robert A said:
wow. I have buy a second hand device and I have the same problem. For sure my screen was changed. I have open the phone from the video here:
http://pocketnow.com/hardware-1/official-htc-hd2-disassembly-assembly-training-videos-leaked
...but nothing ((
Antena it's in up-left when you watch on phone.
Click to expand...
Click to collapse
The WiFi antenna is located at the right of the camera watching the camera in the back panel. If you watch this video, http://pockethacks.com/category/service-manuals/, you will see that the Bluetooth/Wireless atennas are located together and connected to the main board with a coaxial cable.
msnuser111 said:
The cell antenna is the strip on the bottom below the battery door,the wifi antenna is at the top right (if looking at it with the screen up),and the gps antenna is at the top left. There is a white cable that is supposed to run from the gps antenna to the bottom side of the main board,and a black shorter antenna cable that is for wifi that plugs into the top part of the board. I have a pretty strong feeling that the person that fixed your phones (whether that was you or someone else) probably didn't plug that cable in the right way.
<EDIT> By the way,if either of you want one that works the right way/for parts,I have one for sale that the volume buttons don't work and the lcd is cracked,but everything works other than the volume buttons.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270637114813&ssPageName=STRK:MESELX:IT </edit>
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Click to collapse
What this guy said +1
I find myself in a similar situation to nedko76. I had to take my phone apart but just the case away from the screen circuit boards etc because the plastic led shield had come lose and was touching the vibration device causing a strange noise.
So i managed to get the phone apart (which was not as easy as shown in the video) i didn't touch the screen part at all, put it back together again and switched it on. To my relief it switched on, all looked good, the noise had gone from the vibrator however the only thing that is not working is the wifi.
I'm hoping someone has resolved a similar issue without the need to reopen the phone again as i can't help but think i will do this and see nothing wrong. Which would either mean i've somehow damaged the wifi circuit board or something else.
I use wifi alot and will miss it loads if i can't find a way to fix it.
As already mentioned, WiFi antenna seems to be feeded by a tiny cable, it is probably using some tiny coaxial connectors, those are usually relatively easy to accidentally disconnect. I would start from looking at those and making sure they are "wedged in" properly.
I have taken the phone back apart and checked all wires are pushed in and everything is connected from what i can see. But still nothing.
Wifi switches on but just stays at scanning. Now does that mean that the wifi is working but the antenna is the issue.
I'm just wondering if its a software issue somehow. As i never touched any part of the board, or antenna etc whilst it was apart and like i've said i couldnt see anything out of place or loose.
Dude,
There are 2 brass clips on the top right of the motherboard which attach to the rear case antenna. Make sure these brass clips are correctly functioning and working. There are 2 for the gps at top left big ones from memory then there are 2 at bottom for radio antenna and two at top right for wifi.
Make sure these are all ok...
If you can post a detailed photo(s) I can give you more assistance. Zoom in the motherboard and the clips if you do provide pictures.
Good luck
Yeah i saw these when i took the case back off yesterday, i looked at all them to see if there were any differances, any broken off etc but they all looked fine. I did lift the ones for the wifi and bluetooth just a little bit to make sure when the case went back on they would be in contact. But still no luck.
I find it difficult to believe that just taking the case off pushing a little bit flashlight plastic back into place would really stop the wifi/bluetooth from working.
I'll have to keep searching the web to see if anyone has resolved the same issue and what it actually is. It would be interesting to see if people take their cases off then just put them back on again if they have the same issue or whether somehow i've messed something up.
Dude, show me a pic of motherboard to see if all your connections coaxial are ok.
Otherwise, your hardware maybe fubar. I have opened mine several times and no probs.
Right I took my phone apart again this morning to double check everything. I noticed the cable attached at the bottom as mentioned in previous post. It lifted off a bit too easily, so I positioned it correctly and pushed it back down, my WiFi now works. So that was my issue.
So my advice would be if both your Bluetooth and WiFi do not work, it is more than likely the cable is lose. (more likely if your phone has been a part obviously)
Thanks for everyone's help and advice on here. no fubar hardware here thankfully
Common problem after service?
nedko76 said:
I changed touch screen and after that loose WIFI and BT signal
maybe antenna problem
Click to expand...
Click to collapse
I'm also experiencing this after changing a smashed screen... The accident it self did hardly cause this since I used the phone with full performance for about a week between dropping it on the ground and draging my sorry ass to the retailer. Since I don't intend to open this stuff up I guess I'll have to go back there. I will refer to this site if they try to indicate that their sloppy disassembling isn't the reason... Please, feel free to boost me with more cases like this...
I have replaced the screen myself and have the same problem with Wi-Fi only.
I dont know why Wi-Fi run only without the battery cover.
I' m trying to torque chassis for looking if it is a mechanical issue but it seem not.
I've tried also to connect the two little contact they are at the same level with the bottom of the battery looking the phone from its back without the cover.
I've not found yet any relevancy with the presence or not of the back cover related with Wi-Fi transmission.
I remember that when the phone was disassembled, I have slighty lifted with my finger the bigger one of the two lamellar contact of Wi-Fi antenna; anyone know if this could be the cause? Must to touch these contacts chassis or not ?
nothing else ?
so weird question. but meh. im more of a 360 modder. not into phones.. i try to fix them bc im descent with electronics.
but anyways my point is.. anyone ever tried replacing the leds on the button panel?
white 0603s are typically the same as blue. i use alot in controllers and rol boards on the 360.
i got about 50 blue 0603s. and thinking of giving it a shot
Butoon leds are placed on FRONT KEY KEYBOARD MEMBRANE PCB. Search littlebit google and you find what leds they use on this membrane pcb.
Hint!
For getting out this membrane pcb you must detach middle case at lcd/digitizer combo. To attach these back you need two sided tape later.
datas0ft said:
Butoon leds are placed on FRONT KEY KEYBOARD MEMBRANE PCB. Search littlebit google and you find what leds they use on this membrane pcb.
Hint!
For getting out this membrane pcb you must detach middle case at lcd/digitizer combo. To attach these back you need two sided tape later.
Click to expand...
Click to collapse
lol. i got the phone disassembled lol. and they are 0603 smds. i use them alot. but idk the voltage of them. if the blue requires more voltage then the white is giving then they will barely burn or drain the battery quicker.
Hi guys,
What could be the possible reasons for a touchscreen and the capacitive buttons to stop working?
I purchased my Huawei U8800 only very recently but it was purchased 2nd hand. The phone came pre-installed with a custom rom, which is this one here: http://forum.xda-developers.com/showthread.php?t=1481168
I've had very minimal use of it ever since I received it, due to the reason that I have exams as I'm an UNI student. Therefore, I haven't modified the phone in any way, i.e I have not overclocked it or flashed a different kernel or recovery etc. The only thing I've done is installed GO SMS PRO and used it for txting and calling, that's it.
At first, everything seems to work fine. But on my 2nd day of use, the touchscreen started acting weird, where the right hand side of the screen stops working for no reason, as well as the 2 capacitive buttons on the right half of the screen (HOME and SEARCH). Then after a while, the BACK capacitive button on the left half of the screen stopped working, and eventually all 4 capacitive buttons and the entire screen stopped working.
The phone still turns on, but the entire screen doesn't pick up any finger input and there isn't any haptic feedback or vibration from the capacitive buttons. When I boot into the recovery, this is also the same.
So I contacted the seller about this, and he advised me to flash the Cyanogenmod 7.2 rom to see if this fixes the problem. It didn't, the touchscreen still doesn't work.
I'm wondering if this is related to the digitizer, which is the part of the phone that sense your finger inputs? If not, what are the other parts of the phone that could relate to the capacitive buttons and touch screen?
Definately a digitizer problem. The capacitive buttons are part of the touch screen, the touch screen is extended over the bottom of the display.
You should buy a new one from eBay or similar. If you want to buy it with a frame (black part on the front), you will have to open your phone to see if the front speaker is big or small. There are two types of front speakers and they are not cross-compatible. If you just want to buy the digitizer, you will have to remove the old digitizer from it's frame and add some glue on the new one to make sure it won't stick out.
If you don't want to mess with your phone, I am sure there are paid services that will do it for you, since replacing the digitizer is fairly easy.
Blefish said:
Definately a digitizer problem. The capacitive buttons are part of the touch screen, the touch screen is extended over the bottom of the display.
You should buy a new one from eBay or similar. If you want to buy it with a frame (black part on the front), you will have to open your phone to see if the front speaker is big or small. There are two types of front speakers and they are not cross-compatible. If you just want to buy the digitizer, you will have to remove the old digitizer from it's frame and add some glue on the new one to make sure it won't stick out.
If you don't want to mess with your phone, I am sure there are paid services that will do it for you, since replacing the digitizer is fairly easy.
Click to expand...
Click to collapse
thanks for your reply mate!
Ok so I've found this one here:
http://www.ebay.com/itm/Original-To...Glass-For-Huawei-U8800-Ideos-X5-/170721993712
Since it says it's "original", I don't have to worry about the speaker problem right?
chaoscreater said:
thanks for your reply mate!
Ok so I've found this one here:
http://www.ebay.com/itm/Original-To...Glass-For-Huawei-U8800-Ideos-X5-/170721993712
Since it says it's "original", I don't have to worry about the speaker problem right?
Click to expand...
Click to collapse
They are selling the digitizer, so there will be no problems as it's only the digitizer glass and not the frame around it. The frame itself is holding the digitizer and the speaker so that's why there may be issues when buying the front cover.
If you need a disassembly tutorial, check my Mediafire (signature) -> Documents -> U8800 Basic Maintenance Manual. It's the official disassembly guide so you can be sure you are doing it right .
Blefish said:
They are selling the digitizer, so there will be no problems as it's only the digitizer glass and not the frame around it. The frame itself is holding the digitizer and the speaker so that's why there may be issues when buying the front cover.
If you need a disassembly tutorial, check my Mediafire (signature) -> Documents -> U8800 Basic Maintenance Manual. It's the official disassembly guide so you can be sure you are doing it right .
Click to expand...
Click to collapse
Wait, that doesn't have the frame around it? I thought the black part surrounding the glass is the frame? I'm confused.......
I just want something that looks exactly like shown in that Ebay listing photo, where it has that bit of the connector part that you push into the motherboard (or whatever it's called on the phone).
chaoscreater said:
Wait, that doesn't have the frame around it? I thought the black part surrounding the glass is the frame? I'm confused.......
I just want something that looks exactly like shown in that Ebay listing photo, where it has that bit of the connector part that you push into the motherboard (or whatever it's called on the phone).
Click to expand...
Click to collapse
On your listing, it does not have frame.
If it's without frame, it is simply the front glass with connector. If it is with the frame, it has the black curve too (and speaker with led).
See this:
Without frame.
With frame.
Hope it makes sense now
Blefish said:
On your listing, it does not have frame.
If it's without frame, it is simply the front glass with connector. If it is with the frame, it has the black curve too (and speaker with led).
See this:
Without frame.
With frame.
Hope it makes sense now
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Click to collapse
Ahh ic ic.....so would I need to use glue to stick the digitizer glass onto the frame?
chaoscreater said:
Ahh ic ic.....so would I need to use glue to stick the digitizer glass onto the frame?
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Click to collapse
Yeah, but not much. Maybe you don't need to add any glue at all, the old one might hold it too.
u8800-51 touch screen bottom not responding
Blefish said:
On your listing, it does not have frame.
If it's without frame, it is simply the front glass with connector. If it is with the frame, it has the black curve too (and speaker with led).
See this:
Without frame.
With frame.
Hope it makes sense now
Click to expand...
Click to collapse
hi blefish
just posted a similar question:
http://forum.xda-developers.com/showthread.php?p=39201328#post39201328
is it the same solution? (the 4 buttons at the bottom do not work as well as the lower half of screen)
my speaker is 15 mm by 5 mm long (i looked inside). is it big or small?
all the ebay posts do not mention a frame - i will be happy not to mess with the glue
thanks
huwaei G 510
Hi guys,
I did have the same problem with a Huawei G 510. Digitizer broken and replaced, but still not working.
I have no action on screen. It lits but i can't press any button. Either the 3 buttons are working.
Checked the plug, checked some voltage in the pins.
Any other ideas ?
Thanks in advance,
Miltos Matt
Hi,
I've recently changed the LCD panel on my Nexus 4, as well as the headphone jack (which includes the proximity sensor) - the screen was broken, and the headphone jack had very noisy output.
After putting it back together, I noticed that the proximity sensor wasn't working - during calls, it would constantly blank out the screen, and there was no way to unblank it (i.e. it seems to permanently think there's something there).
I took it apart again and noticed that the rubber gasket that fits behind the sensor is missing - it must have come off during the repair and gotten lost.
I tried putting some Blu-Tack behind it as a temporary fix, but no change. Now, I'm not so sure the new proximity sensor is working either.
Anyhow, my first question is, where can I buy a replacement rubber gasket? I've done a search online, and I can't seem to find it for sale anywhere?
Is it available as part of another spare part for the Nexus 4?
Cheers,
Victor
I had to replace the screen on my n4 too and fixing the proximity sensor was a pain in the ass. I had the rubber gasket but it was only working when the front panel was not attached as soon as i attached the front panel it stops working i.e. when in call the screen goes off but it doesn't come back on. So what the guy did was to scratch off the two holes on the top left from the inside of the panel. its looks a bit nasty but its working fine now. you might wana try to scratch off a bit neatly. like in a round shape.
I dont know if the gasket is the cause, but I know a case where this exact problem happens : its when u don't push the sensor well enough to fit in its place, cuz it should be near enough, or it'd blank the screen during calls. Try using a flat screw driver, and push the orange part where the sensors are well enough, that should do the work ( don't push haaard or I'll Damage it). I hope that'd help, cuz finding this gasket is hard. And this applies also for the guy who commented, cuz this is the case for him
Sent from my Nexus 4 using XDA Free mobile app
According to this post:
http://forum.xda-developers.com/nexus-4/help/proximity-sensor-rubber-part-t2571396
the LG part number is MBL65457701
I managed to find an eBay seller selling it (original_parts_mobile_99):
http://www.ebay.com.au/itm/Goma-Sen...gle-Nexus-4-rubber-New-ORIGINAL-/181369205976
I used a small piece of credit card, drilled two holes with t3 screwdriver. Worked like a charm!!!!
Hello, have a YT9216CH. Heres what I got going on.
Scroll down for FM Static fix
1. In order to get bass to truly work I have to go into factory settings-usb settings- then go to each bass-alto-Treble then back out to home . Then up to to the 2 lines and close all the tabs except what ever audio source I'm using. If I change Audio source ( like radio to Pandora, or YouTube ect) I have to do it all again. Anyway to avoid this?
2. Tried to hook up a Performance Teknique tv Module threw RCA but when I open the AUXIN app the screen stays black. Did try a few play store opinions ( Airtv, DVB-T, DVB-T2, TVLive) as well as a few others. All the same outcome " No Device Connected " . Even tried just opening a media player ( VLC, Android Media, Media Player still no joy.
I did figure out a way to correct the horrible static from FM Radio Reception.
Remove the board from the housing. Where the antenna plugs into the board look at the underside. You will see 3 solder joints that hold the antenna socket in place ( also the antenna ground) as well as a smaller joint in the center with a small hole ( that hole is where the Antenna connector from car gets the its positive signal) Resolder the 3 base connections ( grounds) of the antenna socket. Also Resolder the center smaller joint ( be sure not to put to much solder where the center pin of the antenna otherwise the antenna wont fit) Now with a drill bit just larger then the current holes ( I used a step bit ) make the antenna socket as well as the gps antenna jack threw hole 1 size larger. Lastly using some heat shrink, slide over the antenna socket as well as the gps antenna jack and shrink. ( I tried electrical tape, Did make it better but for me still had static) once i used think heat shrink. 90-95% of the static was gone.
The Frequency leak on these devices are crazy.
My unit does still get some static when i turn my A/C converter on.
What do you mean? statically receiving FM radio? where are they drilling a hole and putting a heat shrink? can you upload photos? well thank you
dodo6 said:
What do you mean? statically receiving FM radio? where are they drilling a hole and putting a heat shrink? can you upload photos? well thank you
Click to expand...
Click to collapse
More details, as well as pictures added. Sorry. Haven't taken mine back apart yet. Still waiting for the sdcard/sim card socket to arrive in the mail so I can solder those on.
JohnM81 said:
I did figure out a way to correct the horrible static from FM Radio Reception.
Remove the board from the housing. Where the antenna plugs into the board look at the underside. You will see 3 solder joints that hold the antenna socket in place ( also the antenna ground) as well as a smaller joint in the center with a small hole ( that hole is where the Antenna connector from car gets the center pin ) Resolder the 3 base connections ( grounds) of the antenna socket. Also Resolder the center smaller joint ( be sure not to put to much solder where the center pin of the antenna wont fit) Now with a drill bit just larger then the current holes ( I used a step bit ) make the antenna socket as well as the gps antenna jack threw hole 1 size larger. Lastly using some heat shrink, slide over the antenna socket as well as the gps antenna jack and shrink. ( I tried electrical tape, Did make it better but for me still had static) once i used think heat shrink. 90-95% of the static was gone.
The Frequency leak on these devices are crazy.
My unit does still get some static when i turn my A/C converter on.
Click to expand...
Click to collapse
FM radio antenna socket
Drill the center hole where the car antenna plug's center plugs into? Doesn't that stripe away the metal for the connection? Or are you trying to drill away the plastic between center and outer metal sleeve so the antenna plug can insert in deeper? (mine doesn't plug in very deep)
GPS antenna socket
The center hole is tiny and outer ground is threaded on connector. Kind of like a smaller cable coax connector. What needs to be drilled here and why? Seems like it should make very good contact.
howardc64 said:
FM radio antenna socket
Drill the center hole where the car antenna plug's center plugs into? Doesn't that stripe away the metal for the connection? Or are you trying to drill away the plastic between center and outer metal sleeve so the antenna plug can insert in deeper? (mine doesn't plug in very deep)
GPS antenna socket
The center hole is tiny and outer ground is threaded on connector. Kind of like a smaller cable coax connector. What needs to be drilled here and why? Seems like it should make very good contact
Click to expand...
Click to collapse
If you look closely both the fm antenna socket as well as the gps jack touch the outer rear casing. Which is grounding out the signals. You are drilling the outer case holes so there not touching the jack/socket. I circled and labeled in the pictures. Your NOT drilling anything on the board. Only the back case.
JohnM81 said:
If you look closely both the fm antenna socket as well as the gps jack touch the outer rear casing. Which is grounding out the signals. You are drilling the outer case holes so there not touching the jack/socket. I circled and labeled in the pictures. Your NOT drilling anything on the board. Only the back case.
Click to expand...
Click to collapse
Oh I see, drilling holes in the rear aluminum casing/heat sink to avoid touching antenna plugs+connectors. Thanks!
howardc64 said:
Oh I see, drilling holes in the rear aluminum casing/heat sink to avoid touching antenna plugs+connectors. Thanks!
Click to expand...
Click to collapse
Correct.
The center of the antenna socket has pretty weak solder. Adding a bit thicker or just alittle more solder seems to help ALOT