Develop Bugs

Tab is going into MTP mode and wont charge.....

This is hooked up to the Samsung charger , I have-no idea what the heck is going on..... anyone else?
Sent from my GT-P7510 using xda premium

pdxrealtor said:
This is hooked up to the Samsung charger , I have-no idea what the heck is going on..... anyone else?
Sent from my GT-P7510 using xda premium
Click to expand...
Click to collapse
if you turn off the tab and then plug it in, does the battery screen come on and does the device charge?

pdxrealtor said:
This is hooked up to the Samsung charger , I have-no idea what the heck is going on..... anyone else?
Sent from my GT-P7510 using xda premium
Click to expand...
Click to collapse
My guess - faulty resistors in the charger or one of the wires in the cable is dead.
The Tab expects to see USB D+ and D- shorted together and floating at 1.2 volts, set by a resistor divider in the charger.
Does the cable work fine for USB data transfer?

I think the user has possibly used the wrong wording. If he's seeing the MTP mode come on that means that he's just got it plugged into a USB port on a machine whilst the tablet is on (whilst using the "charger" cable).
Simple answer if that's the case. The tab doesn't charge that way as there isn't enough power coming through the port to keep the tab on and charge. If you however switch off the tab, you should find it charges from the USB port
If not, let us know.

Actually the tab is going into MTP mode while plugged into the outlet, using the supplied Samsung power adapter and supplied 30 pin cable.
I think i need to call Samsung for replacement... although after really thinking about what I just typed I think might be simpler to just buy a new cable online.
Or is it the actual power adapter that's faulty....

Well that is quite odd then. Does the tab charge if you switch it off and then plug it into the outlet / pc?

Chiribo said:
I think the user has possibly used the wrong wording. If he's seeing the MTP mode come on that means that he's just got it plugged into a USB port on a machine whilst the tablet is on (whilst using the "charger" cable).
Simple answer if that's the case. The tab doesn't charge that way as there isn't enough power coming through the port to keep the tab on and charge. If you however switch off the tab, you should find it charges from the USB port
If not, let us know.
Click to expand...
Click to collapse
No, his wording was explicit enough to indicate that the tab is falsely detecting the factory charger as a USB host. This will happen with iPad/iPod/iPhone chargers, and would happen with the factory charger if the cable were faulty (D+ or D- open) or if the charger were faulty.
Again, to the OP: Does the cable work for syncing to a PC to transfer data? If it doesn't work at all, that's a sign that D+ or D- of the cable is open.

Meh, some people use words such as charger and cable interchangeably in terms of their truer intended meanings at times.
I was simply trying to cover that base.

Not sure if the cable works for data ....as I do everything over the air. The cable was giving me troubles at the tab end, (loose connection) but lately has been working OK.
I also haven't been charging and using at the same time lately either. I really needto contact Samsung and talk to them about a warranty replacement, but I have a feeling I'd be better off just buying a new one off Amazon or the like....
Sent from my GT-P7510 using xda premium

Wrong section n00b!!!!

akarol said:
Wrong section n00b!!!!
Click to expand...
Click to collapse
Thanks for that...
Sent from my Nexus S using XDA Premium App

pdxrealtor said:
This is hooked up to the Samsung charger , I have-no idea what the heck is going on..... anyone else?
Sent from my GT-P7510 using xda premium
Click to expand...
Click to collapse
I have the same issue. Check that with different cables. So cable and charger is not the reason

If you're running a ROM with Pershoot's kernel, you can "Enable Charge From ANY USB" (see link in my signature). If you're running something else, you can make yourself a "DIY Universal Charging Inline Cable" that will trick the Tab into charging off anything (again, see the link in my signature).
But before you go out spending money (even if it's just a little bit of $$$) you should see if the cable works for data transfer between your computer and the tab.
If the cable works, then the "DIY Universal Charging Inline Cable" will keep you going until Samsung sends you a replacement charger.

I had this problem and didn't know what was wrong for a while. It turned out the the charger wasn't plugged in all the way in the outlet. I guess it wasn't getting all the juice it needed.

Am suddenly getting this problem tonight also it sometimes turns my tablet off but won't let me turn it on till I pull the charger out.I've also noticed that if I plug it in when the tab is off the battery sometimes comes up saying it's charging
just plugged the usb lead in to 2 laptops and they both show a usb error

I started having the same problem 2 days ago. All of a sudden i plugged in the wall charger and it went into MTP mode. It will charge if turned off but I've noticed it takes a much longer time to charge. From 3% it took almost 24 hrs to completly charge. Thinking that I'll have to buy a new wall charger.

Please help
Another one about charging...
My 10.1 P7510 takes tooooo long to charge, even beeing off. If I connect it to my notebook data transfer is correct but battery keeps draining, or at least not charging. If I turn it off (either connected to PC or charger) the charging icon appears correctly. I must say that cable (and charger) are not the original ones
Is it a problem of the Tab, or cable, and/or charger ?

I think the charger did not have enough current to charge the tab while still using it. The stock charger should be rated at 5V 2A. I tried another charger with only 1A and it still worked. Anything lower than 1A will end up showing that MTP mode.
Sent from my GT-I9100 using XDA App

I've got the same problem myself except I had to clean the charger clean of marinade sauce (it's a long story, don't ask!) and I took the device back to my local Vodafone store (I got it on a Mobile Broadband contract) as I thought it was faulty. They claimed the device was working fine although they used their own cable and not mine. They also claimed that if it was the cable, I should be easily able to buy one.
I tried buying one in every store I could think of, including the phone repair shops and they didn't sell them at all!
It's just a shame that a tablet like this which could have been a great tablet is crippled not only with no MicroSD slot, but also using a crappy proprietary socket whereas all the other Tabs have a MicroSD slot/uses a Micro USB port.
(I've already ordered a replacement cable from Amazon UK in any case for a reasonable price)

mtp-connected and media scanner running
I bought. My Tab 8.9 last November, only started having this problem since last night. There is red cross and mtp-connected,also,"media scanner running". I am using original cable and adapter that come with the Tab. Has anyone here found a solution?

Phone doesn't know it's plugged in.

When the phone is off and plugged into the wall, it charges. When the phone is on, and I plug it into the wall or computer, the phone doesn't know it's plugged in.
I ordered a brand new usb charging flex jack and replaced the old one, still the same problem. What gives?
EDIT: I am stock. Not rooted.

Does this happen on the original cable also?
Have you tried wiping?
Is Fast Charge on?

Fk. It doesn't even charge from the wall! When the phone is off, it has the animation that says it's charging when i plug it in the wall. I left it plugged into the wall overnight. This morning I took a look at the phone, and it didn't charge!
Oh noez, what should i do?
Also, I don't have the original cable. I'm using an HTC one.
EDIT: Dafuq?! I found an LG charger. Apparently the phone knows that it's charging when I charge with that. The thing is, that charger is just a charger; it's not a usb cable+ an adaptor. So I can't use it for adb and such.
What is Fast Charge?

convolution said:
Fk. It doesn't even charge from the wall! When the phone is off, it has the animation that says it's charging when i plug it in the wall. I left it plugged into the wall overnight. This morning I took a look at the phone, and it didn't charge!
Oh noez, what should i do?
Also, I don't have the original cable. I'm using an HTC one.
EDIT: Dafuq?! I found an LG charger. Apparently the phone knows that it's charging when I charge with that. The thing is, that charger is just a charger; it's not a usb cable+ an adaptor. So I can't use it for adb and such.
What is Fast Charge?
Click to expand...
Click to collapse
You should mention what ROM you're on (and version) so that no one else makes the same mistake I did in assuming you had a custom ROM and that Fast Charge is on. It's a feature that makes sure that whatever charges it is recognised as AC 1amp charger as some chargers aren't designed well enough (I believe it involves a single solder point) to report themselves as capable of 1A. If it doesn't report as AC to Android, it will charge at 500mA instead (it assumes USB power). It sometimes causes problems with connecting to PC via USB.
Get another USB cable, this time none of that fancy **** go straight to OE Samsung or something.

=O I thot all usb cables are made equal! So I can't use an HTC usb cable? The dude didn't sell me the phone with a cable T.T
Also, I'm stock. I am not even rooted.

My nexus just started acting stupid when I plug it in also.
Mine sat in a drawer for a few weeks and when I plugged it in to charge, it wouldn't.
What I did was this.
plug device into charger
remove battery for a few seconds
replace battery
press power button
phone powered up and began charging.
Even now, it still sometimes doesn't recognize the charger and I have to unplug and plug it in until it does.
I use a rocketfish cable.

convolution said:
=O I thot all usb cables are made equal! So I can't use an HTC usb cable? The dude didn't sell me the phone with a cable T.T
Also, I'm stock. I am not even rooted.
Click to expand...
Click to collapse
Some devices are picky, you'd think that all USB cables are made equal (I did too) but some just don't work well with certain devices. I've had printers th... wait printers always have **** problems... I've had uh... usb extensions not work well with some Wifi dongles and such. My old milestone didn't like the Samsung cable either (yet the Moto cable works perfectly on gnex)

=O. Then it has to be the usb cable! No way it's not!
I ordered one on ebay =D
Rooted Gnex here I come!

dmappdev said:
My nexus just started acting stupid when I plug it in also.
Mine sat in a drawer for a few weeks and when I plugged it in to charge, it wouldn't.
What I did was this.
plug device into charger
remove battery for a few seconds
replace battery
press power button
phone powered up and began charging.
Even now, it still sometimes doesn't recognize the charger and I have to unplug and plug it in until it does.
I use a rocketfish cable.
Click to expand...
Click to collapse
Thank you dmappdev,
I followed your procedure (feel like talking about surgery here, which isn't too far from topic); I'm convinced that it helped in some way, directly or indirectly... as at first, my Galaxy S Advance still wouldn't recognize/charge my phone with:
1. its own charger,
2. my old Galaxy Ace's charger,
3. a universal wall usb plug used with the S Advanced own USB-to-USBmini cable.
My last idea was to use, quote: an old Nokia USB cable connected to my PC... and that worked.
I was much too happy my phone had remembered how to charge to stay mad... But I still tried those three means for charging again, and only the phone's original charger worked now. So the phone's charging ability has been "awakened" in some way, but only for the original charger ...technology is improving, but not the ethics on making life easier for the consumer.
All this was yesterday. This morning (there's more, yes), I saw my phone indicating a 100% charge although it had been disconnected from charge for several hours - something that had already happened once yesterday, before the unable-to-charge situation; a simple reboot took care of the problem, the battery status now showing a more realistic 53%.
Any comments to any of the above? If not, thanks again for your tip anyway !!!

usb port repair/replacemet

One of my fires won't charge reliably. I am hoping to repair/resolder connections.
I found used motherboard for fifty dollars. Used board will be last resort.
Any pics or previous experience from anyone that might help.
Thanks

Before you do anything drastic, what ROM are you running?

soupmagnet said:
Before you do anything drastic, what ROM are you running?
Click to expand...
Click to collapse
Cm ROM. Teenager sleeping with kindle plugged in. Has had charging issue for a while. I have four kindle fires, two cm7, one ICS, and one jellybean.

There was a father who had done some soder work in the usb area for his kid he was worried at one point he had made it to hot but it turned out to be ok I will search through some threads to see if I can locate his maybe it will have some insight for you...

TheKid2 said:
Cm ROM. Teenager sleeping with kindle plugged in. Has had charging issue for a while. I have four kindle fires, two cm7, one ICS, and one jellybean.
Click to expand...
Click to collapse
I'm not quite sure what that means exactly.
The reason I'm wondering about which ROM the affected Kindle is running, is because the ICS and JB ROMs have had a similar charging issues from the very beginning. The latest version of the kernel was released last night with the charging issue fixed. You may want to upgrade before attempting anything like soldering on your USB connection.

Hopefully it is just the known ROM issue, which has now been fixed. I had difficulty charging my KF because the USB connector was coming loose from the mb. I had a hardware engineer attempt to re-solder it but he was not successful. The connector is very small and it is very difficult to re-solder. If it is a loose USB port, and you can get it back to stock, Amazon will replace it under warranty.
Sent from my Amazon Kindle Fire using xda premium

Go with the used board, but be sure that they match in serial number. The earliest releases of Kindle Fires used a different motherboad connector for the LCD, and are incompatible (found out the hard way). A good case opening kit helps keep from damaging the unit.

Motherboards are very hard to come by...

In that case, buy a unit with a broken screen on ebay. Make sure it's one that still powers on and charges (many will show the lcd working below the screen. More expensive, but you can keep the battery as a spare as well.

soupmagnet said:
I'm not quite sure what that means exactly.
The reason I'm wondering about which ROM the affected Kindle is running, is because the ICS and JB ROMs have had a similar charging issues from the very beginning. The latest version of the kernel was released last night with the charging issue fixed. You may want to upgrade before attempting anything like soldering on your USB connection.
Click to expand...
Click to collapse
Running CM7, not sure of exact rom its been on there so long.

mthous01 said:
In that case, buy a unit with a broken screen on ebay. Make sure it's one that still powers on and charges (many will show the lcd working below the screen. More expensive, but you can keep the battery as a spare as well.
Click to expand...
Click to collapse
Not sure how to identify board revision on ebay?

Ask for revision number and/or serial number and make sure that they match. Even better, get a picture of the board so that you can see they are the same.

mthous01 said:
Ask for revision number and/or serial number and make sure that they match. Even better, get a picture of the board so that you can see they are the same.
Click to expand...
Click to collapse
If it is just a kindle with a broken screen someone is trying to sell, they probably arn't willing to crack it open just to check the motherboard.

Don't buy without proper info. Buyer protection only works so well.
Sent from my cm_tenderloin using Tapatalk 2

Thanks for all the replies.
It looks like if I had a nice hot air rework station I could repair it in just a few minutes. Right now just prying on charger connection to continue charging. I may just wait for it to die completely, afraid I will kill it with soldering iron.

if you make a TWRP backup and copy it to the computer, if/when you replace the motherboard (getting cheaper as the new Kindle Fire rolls out), you can copy this bac kup folder back to the new motherboard and restore. I have done this when I get a solid working JB ROM on a system, just so that I can go back to fresh quickly and easily. Also, suggest that you use Kindle Nullifire on any board bought from anywhere, as it will zero-write the internal sd card, and avoid issues more issues than you would imagine. It's worth the extra 10-15 minutes to do so.

Of Kindles and Chargers and Broken USB Ports
Kindle Battery:
Most of the inside of your Kindle is a huge battery. It requires a ‘hefty’ charger to charge it and keep it healthy.
Chargers:
While the Kindle Fire calls out for a 1.8 amp charger, I would recommend a 2.0 amp charger for the Kindle. iPad 2 chargers, 2.0 or 2.1 amp rating, with USB ports can be used with appropriate USB micro charging cables to work really well.
Many chargers are over rated and many have cheap thin wire that cannot deliver enough amperage to the kindle port and it will not "shift" into charge mode.
A Kindle will pull about 700mA from a charger, and the charger rating printing is mostly marketing and most of them do not deliver that wattage on a constant sustained level.
Charger/USB charger cable thickness:
If using USB to USB micro data cable make sure it is a thick wire cable that can push out the current from charger to kindle. Thin charger cables are conduits of squished electron flow and will not “shift into gear” the Kindle into charging mode.
Helpful hint:
If charger is not working, power down kindle and try:
Unplug charger.
Power off kindle
Plug in charger
Kindle should wake up in "charge mode"
Having fixed many Kindles lately, I am seeing charger issues, and plugging and replugging the USB cable in cause 50% of broken USB port problems.
Hope these hints will help.
A. Zubair, EE

[Q] Won't Turn On. Tried Everything

My phone won't turn on. I own a samsung galaxy nexus (verizon). I've had it for 16 months. I was talking on my phone then ended the call. Had it charging to the wall. Set my alarm for the morning. When I woke up my phone was off. I tried to turn it on. No luck. I did the 10 second volume down plus power button. Still nothing. I pulled the battery and did the wall charger no luck. I plugged it into my computer with the usb. It doesn't register it. The phone has no lights on it. The screen doesn't light up notifying me of it charging. The little flasher light on the bottom doesn't light up. Please help I'm out of options. I called verizon and they said i'm off warranty. I have no other options that I know of besides to get a new phone. I love my phone. I unlocked and rooted it. I have everything on it. I need to get it back on. Any and every idea will be tried. Thank you!!!!
Micah

Question: Did you use the same USB cable from the wall charger to the computer?
Could be a couple of things...if the answer is YES, I would change USB cables and see if that fixes it.
If the answer is NO, you could try to clean out the microUSB port. It's possible that some dust got into it, causing a small shunt or keeping the pins from connecting. I know my previous Galaxy Nexus had this issue...found out I had a piece of lint that somehow got into the MicroUSB port and kept the USB plug from seating correctly.
MicahF said:
My phone won't turn on. I own a samsung galaxy nexus (verizon). I've had it for 16 months. I was talking on my phone then ended the call. Had it charging to the wall. Set my alarm for the morning. When I woke up my phone was off. I tried to turn it on. No luck. I did the 10 second volume down plus power button. Still nothing. I pulled the battery and did the wall charger no luck. I plugged it into my computer with the usb. It doesn't register it. The phone has no lights on it. The screen doesn't light up notifying me of it charging. The little flasher light on the bottom doesn't light up. Please help I'm out of options. I called verizon and they said i'm off warranty. I have no other options that I know of besides to get a new phone. I love my phone. I unlocked and rooted it. I have everything on it. I need to get it back on. Any and every idea will be tried. Thank you!!!!
Micah
Click to expand...
Click to collapse

reply to tkirton
tkirton,
I used a different charger than the micro usb cable. in fact i used multiple different chargers. I also blew out my usb ports and cable. I tried again and again, using different usb ports as well. it didn't work. My computer just doesn't seem to identify the cable or phone like it use to.

MicahF said:
tkirton,
I used a different charger than the micro usb cable. in fact i used multiple different chargers. I also blew out my usb ports and cable. I tried again and again, using different usb ports as well. it didn't work. My computer just doesn't seem to identify the cable or phone like it use to.
Click to expand...
Click to collapse
If you have exhausted all possible means then the last resort for you is to try the USB jig. Usually it can wake the device up and put it to ODIN mode. If that fails too, then its a possible major hardware failure.
Sent from my Galaxy Nexus using XDA Premium 4 mobile app

whats a USB Jig?
tkirton said:
Question: Did you use the same USB cable from the wall charger to the computer?
Could be a couple of things...if the answer is YES, I would change USB cables and see if that fixes it.
If the answer is NO, you could try to clean out the microUSB port. It's possible that some dust got into it, causing a small shunt or keeping the pins from connecting. I know my previous Galaxy Nexus had this issue...found out I had a piece of lint that somehow got into the MicroUSB port and kept the USB plug from seating correctly.
Click to expand...
Click to collapse
rajuki said:
If you have exhausted all possible means then the last resort for you is to try the USB jig. Usually it can wake the device up and put it to ODIN mode. If that fails too, then its a possible major hardware failure.
Sent from my Galaxy Nexus using XDA Premium 4 mobile app
Click to expand...
Click to collapse
What is a USB Jig?

MicahF said:
What is a USB Jig?
Click to expand...
Click to collapse
you can find the answer to this in HERE
Question , when you connect the charger, does it light up the battery symbol ?
Have u tryed to "center "the phone usb port with a needle or something like that ??
if not plz try this :
1) turn the phone off and take the battery out
2) take a toothpick, knife , pin or whatever will fit into the micro USB slot of the galaxy nexus.
3) VERY VERY slowly make it so that the little shelf like connector is in the middle.
4) connect ur phone and hope it gets back to life

mbi0 said:
you can find the answer to this in HERE
Question , when you connect the charger, does it light up the battery symbol ?
Have u tryed to "center "the phone usb port with a needle or something like that ??
if not plz try this :
1) turn the phone off and take the battery out
2) take a toothpick, knife , pin or whatever will fit into the micro USB slot of the galaxy nexus.
3) VERY VERY slowly make it so that the little shelf like connector is in the middle.
4) connect ur phone and hope it gets back to life
Click to expand...
Click to collapse
When i connect my charger i get nothing. no symbol no lights no response. and the centering of the usb charger didn't work either. my phone has such a tight fit i couldn't even fit a thumb tack pin into it.
I've done lots or research on the USB jig. I'm going to try it. or find someone that has one. wish me luck!

MicahF said:
When i connect my charger i get nothing. no symbol no lights no response. and the centering of the usb charger didn't work either. my phone has such a tight fit i couldn't even fit a thumb tack pin into it.
I've done lots or research on the USB jig. I'm going to try it. or find someone that has one. wish me luck!
Click to expand...
Click to collapse
Good luck. USB Jig might be your last resort before you send it to repair.

[Q] High-pitched whining noise while plugged into charger

I have a rooted stock 4.4.2 Nexus 7, and I'm encountering a really weird problem where there's a persistent high-pitched whining noise that seems to come out of the speakers whenever it's plugged into a wall charger. I tried the stock charger + cable that came with my device as well as 2 other third-party chargers all with the same results. Meanwhile, charging it via USB connected to my computer doesn't produce that sound at all.
Does anyone know if there are any tweaks or settings that could be causing this? I looked in the FAQ, and I only see a giant thread about static while at low volumes, but this looks to be a completely separate problem since it's unrelated to volume settings & it happens when I have no sound playing at all. Googling this returns a bunch of results with people's chargers making noises, but not the Nexus 7 itself.
If anyone else has had this problem and can offer any insight, that'd be appreciated. It's not the biggest deal in the world, since I just have to make sure I'm not in the same room when it's charging so I don't get annoyed, but if I can fix it, that'd be great.

tarotsujimoto said:
If anyone else has had this problem and can offer any insight, that'd be appreciated. It's not the biggest deal in the world, since I just have to make sure I'm not in the same room when it's charging so I don't get annoyed, but if I can fix it, that'd be great.
Click to expand...
Click to collapse
Maybe a ground loop. Can you ground your tablet and see if that helps. Just a theory at the moment.
Sent from my Nexus 7 Flo running CM 11 4.4.2 with ElementalX Kernel using XDA Premium 4 mobile app

LinearEquation said:
Maybe a ground loop. Can you ground your tablet and see if that helps. Just a theory at the moment.
Click to expand...
Click to collapse
Sorry for the dumb question, but to ground it, just have it touching metal?
Also, a new piece of information: I found that the noise only happens when the tablet is fully charged (100%) and still plugged in, so it happened last night while I left it in to charge after going out. I'll have to wait for it to fully charge again before I can test this theory today.

tarotsujimoto said:
Sorry for the dumb question, but to ground it, just have it touching metal?
Also, a new piece of information: I found that the noise only happens when the tablet is fully charged (100%) and still plugged in, so it happened last night while I left it in to charge after going out. I'll have to wait for it to fully charge again before I can test this theory today.
Click to expand...
Click to collapse
Not an extra ground, isolate the ground. Make sure the tablet and charging brick are grounded well. Is your outlet/house grounded well? Can you use an outlet with nothing else plugged into that line?
You say this only happens when fully charged and not until? I wonder if there is a problem with the battery perhaps over charging. Have you switch charging bricks? Switched cords? Does the charging brick get warm? How about the back of the tablet?
Edit: Are you using the official cord and charging brick? That can make a difference. If not what are the specks of the brick you are using?
Sent from my Nexus 7 Flo running CM 11 4.4.2 with ElementalX Kernel using XDA Premium 4 mobile app

LinearEquation said:
Not an extra ground, isolate the ground. Make sure the tablet and charging brick are grounded well. Is your outlet/house grounded well? Can you use an outlet with nothing else plugged into that line?
You say this only happens when fully charged and not until? I wonder if there is a problem with the battery perhaps over charging. Have you switch charging bricks? Switched cords? Does the charging brick get warm? How about the back of the tablet?
Edit: Are you using the official cord and charging brick? That can make a difference. If not what are the specks of the brick you are using?
Click to expand...
Click to collapse
Another new piece of information discovered today: The high-pitched whine only happens when the battery is 100% AND when the screen is on. When the screen is off, everything is fine.
So far I have tried:
1. Directly plugging into the outlet the stock Nexus 7 charging brick & cord.
2. Using the following bricks: Stock charger, Anker 40W 5-port USB charger, Amazon Kindle charger, Moto G stock charger. I've also tried all the cables that came with these devices as well as any other microUSB cables I've got lying around the house.
3. My device is not hot at all, and neither are the chargers.
Thanks a lot for your help so far! Looks like what I need to do is to turn the screen off to charge my device, and then unplug it when I want to turn the screen on & use it.