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How to factory reset Galaxy Nexus?

I have a Google Galaxy Nexus bought unlocked from Google about two weeks ago.
A few hours ago, I seem to have unintentionally locked myself by setting both a PIN and PUK. I was not aware that I was setting anything more than a 4 digit PIN. Whatever a PUK might be, is not explained in the manual printout here in front of me.
I was presented with a numeric keypad screen that wanted me to set (reset?) both. Across the top of the screen I was getting a marquee saying I needed a min of 8 characters and below that, a field for PIN and a field for PUK (it would have nice to at least once be told what that acronym stands for).
Cancel only just turns off the screen (not the phone). Same with OK.
So, I did power off. But when I turned power back on I get that same screen and the phone is locked.
So, I read the manual again. No real help on how to have avoided this or how to get out of this trouble.
I searched the net. I found instructions somewhere that told me I could do a factory rest that would loose all data, etc. Since I have only had this phone for a short while and done little to customize it, I could live with that. My mail, calendar and photos are synched to my desktop.
So, I followed the instruction for factory reset (and took note that the manual with this expensive device is no help with this important function nor does it give me a phone number for support. Shame on someone for that decision.)
1. power off
2. hold volume button
3. hold power button
That returned a screen with a large Anroid character, plus a large right facing arrow containing the word "Start" in the arrow. Beneath the android it says "Downloading. Do not turn off target!!" The double exclamation marks suggest this is to be obeyed.
Another aside to whoever designed this thing. the first rule of communication is, "The effectiveness and efficiency of any message is 100% the responsibility of the sender." The corollary to that is, do not use jargon or technical terms unless you include a definition.
So, what or who is a "target?" Other than a set of concentric cirles and the name of the place my wife buys Martha Stewart sheets , I know no other target.
BTW - if I am supposed to touch the arrow to launch something (and perhaps turn off the target?) it's a waste. After 15 minutes of no action, I touched it. Nothing happened.
So now I have a screen that tells me to not do something, leaving me with the fear of doing anything at all. And even if I should do something, like touch the Start, nothing happens. Now close to 1/2 hour has passed and the "downloading" message is unchanged. WTF is it downloading? Anything at all?
Do I now own a warm paperweight whose enigmmatic screen will go dark in a few hours?
Or can I do something that actually works?
Thank you for your patience in reading this. The book Alice In Wonderland was shorter and much more interesting.
Any useful suggestion will be appreciated.

update on stuck reset
After the phone sat here onm desk for a few hours, with that same screen and warning (do not close target). I picked up the phone to move it to the side.
When i grabbed it, I accidentally squeezed the power button. That ascreen wnet away and then it blinked back to the screen tthat wants the PUK and PIN.
Any idea wht to do from here?
As I said at the start, I am willing to do a factory reset. Obviously I do not know how.
Advice, please?

Easy.
joehark said:
I have a Google Galaxy Nexus bought unlocked from Google about two weeks ago.
A few hours ago, I seem to have unintentionally locked myself by setting both a PIN and PUK. I was not aware that I was setting anything more than a 4 digit PIN. Whatever a PUK might be, is not explained in the manual printout here in front of me.
I was presented with a numeric keypad screen that wanted me to set (reset?) both. Across the top of the screen I was getting a marquee saying I needed a min of 8 characters and below that, a field for PIN and a field for PUK (it would have nice to at least once be told what that acronym stands for).
Cancel only just turns off the screen (not the phone). Same with OK.
So, I did power off. But when I turned power back on I get that same screen and the phone is locked.
So, I read the manual again. No real help on how to have avoided this or how to get out of this trouble.
I searched the net. I found instructions somewhere that told me I could do a factory rest that would loose all data, etc. Since I have only had this phone for a short while and done little to customize it, I could live with that. My mail, calendar and photos are synched to my desktop.
So, I followed the instruction for factory reset (and took note that the manual with this expensive device is no help with this important function nor does it give me a phone number for support. Shame on someone for that decision.)
1. power off
2. hold volume button
3. hold power button
That returned a screen with a large Anroid character, plus a large right facing arrow containing the word "Start" in the arrow. Beneath the android it says "Downloading. Do not turn off target!!" The double exclamation marks suggest this is to be obeyed.
Another aside to whoever designed this thing. the first rule of communication is, "The effectiveness and efficiency of any message is 100% the responsibility of the sender." The corollary to that is, do not use jargon or technical terms unless you include a definition.
So, what or who is a "target?" Other than a set of concentric cirles and the name of the place my wife buys Martha Stewart sheets , I know no other target.
BTW - if I am supposed to touch the arrow to launch something (and perhaps turn off the target?) it's a waste. After 15 minutes of no action, I touched it. Nothing happened.
So now I have a screen that tells me to not do something, leaving me with the fear of doing anything at all. And even if I should do something, like touch the Start, nothing happens. Now close to 1/2 hour has passed and the "downloading" message is unchanged. WTF is it downloading? Anything at all?
Do I now own a warm paperweight whose enigmmatic screen will go dark in a few hours?
Or can I do something that actually works?
Thank you for your patience in reading this. The book Alice In Wonderland was shorter and much more interesting.
Any useful suggestion will be appreciated.
Click to expand...
Click to collapse
Just go to the shop you got the SIM and they will unlock it for you with a new PUK code!

[SOLVED with Fix] - Broken lock/power button cant power on (Desire s)

SOLVED
How to fix - Do the staple trick that I did IF you pryed your lock button open. There are contacts which aren't visible unless you open your phone up. Put a staple lightly but directly into the slot without touching the contacts for you camera or any other components. A light touch will trigger it and the power button should create a electrical circuit for a second and my phone turned on!
Hey guys,
New to the forum members but not new in experience as this site is a great help :victory: (not sarcasm)
YES I WATCHED THE NOOB VIDEO - found another thread which said "Use a little screw driver move black tape and you'll see little lines touch the with screw drive should turn on"
Link to another thread I found but didn't help - http://forum.xda-developers.com/showthread.php?t=1621940
(MY PHONE WAS OFF AT THE TIME) Right.. so I dropped my phone on Monday and probably fell on top of the lock button when there's a case (yeah I know.. weird right) So I couldn't turn it on and had to take the backplate off and with staples on the bus (I looked like an idiot) but voila! it turned on. But when I reached home I pryed out the lock button as I dented it too much and now it's broken and the lock button mechanism is broken (the little cube with the clicky button)... I installed an app when I got home to use the proximity sensor to lock and unlock the phone (TAP TAP APP) *Free*
-TODAY- I woke up a while ago, and called a number I didn't know but called me.. so just as I got off the call I needed to end the call but the screen kept waking and not waking but he could of ended it but was stupid enough not to darn telecom marketers.. so I waved my hand to unlock it but then the black screen just stayed there and I took out the battery.. (stupid I know but I didn't want my minutes to go).
Thank you guys much appreciated if I get this done today. IT IS A ROOTED PHONE BY THE WAY!
Fixes i've tried - Plugging into a computer
Taking out the battery whilst it's charging and placing it back in
Placing the battery in, charging it, taking it off charge and charging it again

Moto G LTE completely bricked

Hello everyone ,
One month ago i broke my screen and ordered a new one, meanwhile i bricked my phone like hell, it means that i can't go in any recovery mode (with the volume and power buttons). I repaired my screen last week but i still can't have access to any menu. The screen is working (but i only have gray or green colored screen) and it seems that some functions too, like making a print screen (that's weird?!).
I'm posting here to know if someone can explain to me if it's still possible to reflash any roms in my phone via my pc (it stills appear on my pc when i connect it, but the phone seems completely empty when i access to it).
Many thanks for your answers,
Tuti

Replaced screen, not booting

Hey guys,
just replaced my screen by myself and it isn't working. It boots and the screen lights up for a few seconds but thats it. So it seems like I ****ed up somewhere. :/
Now I've got some questions for you guys.
1. What could cause this error? Since it's already not working I don't mind taking it apart some more and trying to fix it.
2. Do you think if I send it to the support from OnePlus they will take a look at it?
3. The whole reason I did this was to get my data back. Is there any way to access the data on the phone without the touchscreen? I encrypted it using CynogenMod. USB-Debugging is enabled.
Thank you so much guys, I'd really appreciate some help. This **** is really tearing me down since it was a lot of work.

I did this on my own phone but Idk about OPO. If you use the power+voldown method to boot into recovery (yes ik nothing on screen) then connect a usb and see what happens
If you power it on, wait 5 mins then call it and if the phone rings you should be able to rule out the display and speakers and storage, obvs if the display is still not on at this point it is probably the display.
you can also adb from recovery and or fastboot so you should be able to see it in there if it is still working (make sure you change the phone for a decent amount of hours before you do any of these) If the display is dead its likely its been on for the last day and dead

Sorry for the late answer, really appreciate your help!
So if I connect the phone to the PC (tried it in recovery and in normal mode) windows detects the phone under "Devices" but sadly if I type in "adb devices" in cmd it doesn't detect the device.
But still, windows is detecting the phone so it seems to still function. I booted into recovery and I could use the touscreen and the lower buttons. I couldn't see anything but it was vibrating whenever I was using the touscreen. So it seems like only the display part is broken.
Can't call the phone since it's fully encrypted so I need to type in a password before booting anything (recovery, normal mode, ...)
I'll try to contact the vendor of the display and see what he has to say.
If anyone got any more tips I'd appreciate them. I'm a pretty big noob so I even appreciate "common sense" tips.

I know this may be a "common sense" thing to say, but double check your connections. Sometimes the connectors aren't made properly and a pin could be covered so you can try connecting and disconnecting several times to see if it clears up.
Since the touch screen was registering and vibrating, then it could be the backlight that's broken. Try holding a flashlight at an angle and see if you can make out anything on screen. If it's the backlight, then you can probably back up your data in case your phone does end up breaking.

reconnected everything multiple times and also tried the flashlight trick. sadly with both no luck
but something good:
adb recognizes my phone in "recovery"
bad news: no commands work, most likely because the phone is encrypted. if I enter a command nothing happens, it looks like its loading forever.
any ideas?

Hey!
I also had the same problem after I replaced OPO's screen about one year ago. The replacement screen was from ebay.
I could see the Cyanogen logo but after a few seconds the screen became black. Booting into recovery mode worked well.
On the video also ROM boots well but the screen stays black.
https://www.youtube.com/watch?v=VcWDCJIkPKQ
Eventually, the screen was defective and I returned it and bought new one.

Black screen except for camera? J7 Crown. no USB debugging. Recovery mode access

Situation: Samsung Galaxy J7 Crown. Never messed with. USB Debugging not enabled No special permissions (no ADB). I am able to access the Android Recovery screen. Obviously wipe cache partition didn't help, nor Lacking storage booting. Other than the Recovery and download screen: I get the Power/Restart icons when booted normally. Reset works, but power doesn't turn the phone off. No phone calls, Yes notifications. Camera from lock screen comes on (triple click on home button) and touch screen works.
I've tried to trace out the lock pattern in the hopes its still working outside this specific situation. No indication that it is.
All i want is a few sentimental pictures. Although after an entire day of frustration, finding out that the only thing that works is the camera is kinda funny and ironic.
Ive looked on XDA forums, but I'm having no luck w/ exact situation, although I'm sure someone has been in the same situation or similar enough.
Spent all day looking at options (Odin?) and nothing looks like it would work out for me.
Knowing the camera works, makes me hopeful that a mirror would work? No reaction to lock screen pattern makes me think not.
Additional (maybe irrelevant) info. Shows up on home WiFi while Find My Mobile said it was offline (makes sense with Notifications/no calls)
Any advice? Just point me in the right direction if there is one.
If not i hope you appreciate the Irony here. Thanks
(I used to be not so bad tech support, but haven't been keeping up as of late, and today was a painful reminder. Take pity on me.)

Black Screen Except Camera - Galaxy J7 Crown
Hey there anick22! I was so glad to see a search result with something referencing the camera working, on an otherwise completely black screen! I was super bummed to see that noone had replied to your plea for help with this insane problem!! I hope you found a solution by now!!
My 2 month old Galaxy J7 Crown suddenly went black on me one day, and it didn't happen as a result of a drop, or spill, or any other damage. I don't recall having put any new or different apps on it, recently, either.
The triple click of the Home button does open the camera, and the screen lights right up, perfectly. It takes it's usual beautiful pics, and I'm able to use all of the camera functions. I'm even able to view any photos I took during that particular session, buy not any prior pics, because I'm unable to unlock the phone.
"Hey Google!!" also reacts, and will display the result of any question that I may ask it, but I'm unable to go into the answers, without the ability to unlock my phone.
I have been able to get the phone into safe mode, while attempting to power it off, by pressing the power button, and then tapping on "power off" (although this hasn't worked every time I've tried). While in safe mode, "safe mode" is displayed in the bottom left hand corner, but nothing else appears on the screen.
Upon powering up the phone, all of the normal things happen. It shows "Samsung" and goes on to the blue screen to show the "Trac Fone" logo, but once the phone is booted up, the screen is black!!
PLEASE tell me that you were able to find a solution to this!!! I went and purchased a new Moto G7, (since I had a Droid Turbo 2 in the past, and it was amazing!!), and I'm beyond ready to get back to my J7 Crown!! PLEASE HELP!!
Thanks so much!!!
By the way, I'm a newbie here, as If you couldn't tell!!