As per the title I am getting a much diminished signal after changing the charging port to a new one.
The worst is when I grip it in my hand which would naturally be at the bottom - where the charging port is.
I only get LTE when I'm outdoors and indoors it's either H+ but usually H, E, or even NO SIGNAL.
I can't figure out what could be the problem. There are 2 antenna inside the unit that connect to the charging port but these are bluetooth and wifi. It doesn't appear to be an antenna for the network signal. Or is the frame part of the network antenna? I see some electronics in the frame when I dismantled and I don't know what that is for or how it connects to the mobo. I'm thinking if the frame works as an antenna maybe it's not connecting to the mobo properly.
Just to clarify I was having no signal problems before I dismantled the unit and in fact it was working exactly the same as my previous phone.
I actually don't know if the charging port part has anything to do with the signal antenna.
Any comments appreciated.
Hello,
I'm experiencing the same problems with my SM-G920F. After replacing the charging port the bottom mic isn't working anymore. I'm forced to call on speakerphone to get the sound to the other end of the line. The repair centre who fixed the phone said it could be because of a little off-point alignment when soldering the usb pin on the pcb. They also said that they experienced the same problems on different repairs for the S6.
Any thoughts?
Makzinations said:
Hello,
I'm experiencing the same problems with my SM-G920F. After replacing the charging port the bottom mic isn't working anymore. I'm forced to call on speakerphone to get the sound to the other end of the line. The repair centre who fixed the phone said it could be because of a little off-point alignment when soldering the usb pin on the pcb. They also said that they experienced the same problems on different repairs for the S6.
Any thoughts?
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I think I know what happened. When I took off the back cover plate it was glued to what looked like a Printed Circuit Board antenna and it was yanked by myself. Anyone know where I can get these type of things to buy and repair ?
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Hi friends
I am having an handset(Tilt) with flex cable problem, but wondering if flex cable can solve my phones problem where it is doing the following:
-Not accepting the SIM.
-phone is getting hanged any times, speed is also very pathetic.
-keypad is pressed on its own.
-Phone is not accepting any charger but charging with PC USB.
These are some of the major problems, I wish if someone could help me out in knowing what work does a flex cable plays, coz the technician is charging so much to change the flex cable & giving me no assurance as to what problems will be solved. I would like to know from some of those technicians here who knows something about hardware. Mike I am talking about you specially.
I would like to write this in our XDA encyclopedia given the case I get proper knowledge about it.
Looking forward to answers.
This is quite difficult to answer without testing. The SIM not being recognised will in itself slow down the phone or even create a full blown crash.
It's not stated what flex cable we are talking about. Flex Cables are just multi wire connections between circuit boards. Phones often have 3, 4 or more flex cables. For example between the the physical keypad and the motherboard or the d-pad and the LCD screen or between screen and motherboard etc etc.
It IS possible a flex cable can get damaged. This normally happens in phones with a slide out keyboard where the flex-cable has to roll back and forth as the keyboard slides in and out. However, such a cable would not I think change the charging behaviour of the phone.
It charges on PC connection but not charger connection. To me that normally indicates a USB port connection problem - bent pin in the slot, possibly even crossed pins or a cracked or dry solder joint between the usb port and the motherboard.
Another thing to consider is whether all the battery contacts are making good contact with the phone. Here again the multiple connections between battery and motherboard can become dry or cracked leading to erratic or underpowered connections.
The keypad being pressed on it's own can again be caused by different things:
1
It could be a faulty or loosley connected flex cable
2
Pressure being put on the digitizer screen by something under the bezel or just a damaged digitizer layer
3
A key that is not releasing from the keyboard properly (is it always the same key or group of keys?)
4
Moisture at many different places inside the phone, including keyboard, d-pad etc. Even when dried out, the residue or oxidisation can continue to cause problems.
So, I would not rule out a flex-cable problem, but it might not be the only fault. Unfortunately then, the technician you spoke to may be correct and it is not possible to guarantee it will solve all problems. Having said that, I would want to say to the technician that I am not going to pay for a new flex if it does not solve any of the problems.
This is where it becomes difficult to decide whether to go for paid for repair or to attempt the job yourself.
Mike
Anyone have a broken XT720 they are willing to part out or maybe already started to part out?
I replaced my digitizer glass today (boy was getting the glass removed a pain in the ass!) and when I was reassembling the phone the white antenna cable end broke off that pushes down onto the mainboard.
You can see the cable at the 5m mark in this disassembly video (not mine):
http://www.youtube.com/watch?v=_WCVqEMZbU0&t=5m
(The video is good but unfortunately stops before taking out the digitizer glass)
I initially thought this may be for wifi antenna (same antenna cable found in laptops on wifi card) but I still have good wifi signal, but I am unable to register on network so it may be going to cell radio and not wifi radio.
I may try and make one out of an old laptop cable, but I would have to cut it/solder it to get the right length (and thats if the connector is the same), so I am hoping someone is willing to part with one!
Thanks!
Look around
I am hoping to salvage my wonderful nexus 5. When replacing the screen I partial pulled the 3g antenna connector off of the main board. Now I randomly have service. Sometimes pushing on the back of the phone works to reestablish service, normally it does not. I was curious If I could get a custom antenna wire that would go from what i believe is the antenna test point to the normal connector on the bottom. If you think this would work any suggestions on where I could get that type of connector made
Hello! So I have an Nexus 5 D820 and after changing my battery in some areas of my city or my country I don't have any reception. While writing this I popped the battery cover and applied a little pressure with electrical tape to the black wire which I believe is for the reception but I can't tell if I fixed it because most of the time I have reception. So what should I change to fix my reception - only the little black wire or the hole bottom PCB with the plastic cover ? Thanks in advance!
Since it's working at some places it's probably not your device's fault that it can't connect at some other places. Nevertheless:
To change your battery you must have removed the motherboard cover to remove the battery cable. The GSM antenna is on the motherboard cover and is connected by simply touching 2 small conductive pieces on the motherboard (with the phone facing down and the motherboard cover removed, these should be at the top right area of the motherboard). There are also 2 wires (along with a big wire strip) that connect the 2 bottom edges of the motherboard to an extra little board below the battery (where the USB port and other components are). Those are antenna extensions, one of these is probably the black wire you are talking about. The right one is for 3G and the left one is for 4G (with the phone facing down), don't remember the colors. If you have a problem with data connection and not normal cell reception, check those 2 wires. The 3G and 4G antennas are on the black plastic cover of that extra little board and connect to it with a similar way the GSM antenna connects to the motherboard (each one has 2 gold flexible metal pins). You didn't need to remove that plastic cover to replace the battery, but if you did, remove it again and check the connector and those gold pins.
Whatever you do: NEVER DO ::ANYTHING:: WITHOUT DISCONNECTING THE BATTERY (xp talking).
Shutdown the device normally, remove back cover, remove motherboard cover, disconnect the battery cable, and THEN do whatever you have to do.
The screwdriver is usually metal and can short things. You really don't want to short something on the motherboard with the battery connected.
Thanks! I started losing signal after I replaced my battery(before that no problems whatsoever), but couple of days ago I opened the phone again and applied a little pressure to the both wires and I hope it's fixed. Also today I'm going to the place where I'm losing signal and I will find out.
Background: I bought a Pixel 1 (5") off eBay with a known GPS issue and bad charging port. Also bought a second Pixel to use as a parts phone. On disassembly I noticed this gem (see attached photo).
Turns out both motherboards have this issue. Is this a common dilemma or do I have some great mojo going on?
The antenna connection fop (connector) has popped off with the male ends still connected to paired antenna. It may explain some GPS issues I've read about. Both phones had been obviously dropped (broken back glass and/or LCD). Antenna was loose on opening.