[Q] Force tablet to cold boot when USB cable is plugged in? - Viewsonic ViewPad 7 & Variants

Hi,
I've just bought a Commtiva N700 to stick in my car as a carputer. I want to embed the tablet in the dash, so the power button will be obscured. I will have it connected to power so it will charge, but on the odd occasions that it does go flat and shut down completely, I want it to come back up without any user interaction.
So, is there a way to configure it to boot into Android once it starts to charge?
The tab is rooted and Clockwork Recovery is installed. Currently, when completely shut down and the USB is plugged in, I'm presented with a large battery charging animation. Is this part of the devices proprietary firmware? Or does the linux kernel boot up to a certain point to perform the charging process?
Any and all help much appreciated.
Al.

I'll take that as a resounding "I'm not sure". Hehehe.

Related

[HELP] How to Fix "Battery Low - Cannot program"

Hi all,
A friend on Frandroid Forum, post the problem how to Fix "Battery Low - Cannot program" with Fasboot mode ... I see more post on defy, milestone, etc... but with the RAZR XT910 .. can't open and see the batterie....
Could you give your me an idea please ??
Sorry for my bad english
I post on the Defy thread too
Thanks in advance !!
Is your phone stuck or something? if it low battery then charge it up?
Thanks for your answer.
Apparently my friend charge all night, he just see a white led loading and this message when starting in fastboot!
He charge on PC so I advised him to use a charger rather and wait very long time ...
You must be charged before you attempt any flashing.
If the phone will boot normally you will need to boot it, let it charge, then flash.
If it it bricked, you may be out of luck.
Get out of the "Fastboot" menu and try to charge it.
merci à toi alex tu m'a bien dépatouillé
nexus351 said:
merci à toi alex tu m'a bien dépatouillé
Click to expand...
Click to collapse
You are welcome (You must speak english here !! but I understand !)
i have the same problem only mine is worse:
got a gsm razr XT910 and accidentally formatted the system (i know very stupid move). In this case i believe a simple flash using RSD lite would work? ( -question because I've never done it before) but the problem was that i didn't have a pc nearby for a while. I tried switching it off but whatever i did it just booted back up so all the battery drained.. (i think i've found out how to force it to switch off now but thats not the point)
the point is that it was off completely, when i plug it into the wall charger it just tries to boot with the 'M' logo stuck on my screen, the LED is off and there's no charging going on. If i take it out of the charger at any point it just dies and doesn't start again unless i plug it in no matter how long it's been "charging".
The only thing that does happen where i see some hope is when i plug it into the pc now the screen remains black and the LED is white, after a while i can unplug it and it will work without the charger so i assume it charges through my pc. the thing is though, when i leave it plugged in every hour or so it tries to boot by itself and the LED becomes dark(not charging), left it like this overnight and it was dead in the morning. What i do to solve that is whenever it starts booting i switch it off and plug in again then its the same, LED on, screen off.
Using the PC method i can wait for like twenty minutes and then it has enough power for me to put it into the fastboot mode however it displays the "low battery cannot program" message and i can't flash using RSD..
My plan for now is to keep doing that hoping that it will charge this way, however its been 7 hours and it still tells me the battery low message...
Does anyone know anything that would help me? Any help will be so appreciated!
I heard of using a 'factory cable' but I'm not sure where to buy it and don't have the electronics equipment to make one. I live in london uk so maybe someone here who has one could help me out? Seriously at this point: any help any advice will be worth a lot,
Thanks in advance
Hi,
To make a factory cable you can see this thread
and if you want buy one ... see this link !!
Have a nice day.
this link is only for american deliveries I'm an London man!
Create your own cable !!! It's not very difficult !
he's talking about using a solder station to melt the wires together, i don't have that..
USB Cable
This happened to me and I had to jump it with a USB cable.
Here is what I did:
Take a standard USB cable and cut off a section of wire with the larger connector ( the side that connects to the computer).
Strip the outer shell exposing 4 small wires (2data, 2 power).
Tie off the Green and white wires and strip the Red and Black.
Remove the back from your Razr and connect the Red wire to the + and the Black to the - terminal of your Battery (they're marked).
Plug in the USB and boot into Fastboot.
Connect your standard Data cable to the phone and do your thing.
Just saying....
There's actually a thread in the RAZR Development section. You could have found it in seconds if you searched for it instead of directly creating a new thread.
[GSM/CDMA] How to flash a via RSD when you read "Cannot program" or "Battery LOW"
mindrazr said:
This happened to me and I had to jump it with a USB cable.
Here is what I did:
Take a standard USB cable and cut off a section of wire with the larger connector ( the side that connects to the computer).
Strip the outer shell exposing 4 small wires (2data, 2 power).
Tie off the Green and white wires and strip the Red and Black.
Remove the back from your Razr and connect the Red wire to the + and the Black to the - terminal of your Battery (they're marked).
Plug in the USB and boot into Fastboot.
Connect your standard Data cable to the phone and do your thing.
Click to expand...
Click to collapse
Thanks for the advice although i have a couple of questions:
-After cutting off the part of the cable we keep the large usb end right?
-What do you mean by the outer shell? The part that actually goes into the computer? or the casing of the cable on the cut off side?
Thanks
Yes, you keep the larger end that connects to the computer.
Strip the outer wire to reveal the 4 colored inner wires.
mindrazr said:
Yes, you keep the larger end that connects to the computer.
Strip the outer wire to reveal the 4 colored inner wires.
Click to expand...
Click to collapse
I've done that, and i'll connect the wires to the battery screws in a sec and then i plug it in to the charger? and a normal usb to the pc as well?
uhhh..
No, don't plug it into the wall charger at all.. That's crazy talk.
Just plug both USB cables into your computer and fire up Fastboot.
keeps saying "failed flashing process, phone returned fail"
what is wrong now?? everything should be fine
ok
I'm assuming you're referring to a massage being displayed by RSD when run on your computer?
Walk me through your process in detail. What does your phone say when this happens?
How did you connect the USB to your battery? If you didn't make a secure enough connection it won't provide enough juice. You need clean wires and a secure connection. I loosened the battery terminal screws and connected the wires directly to the terminals then tightened the screws and it worked without issue.
Need a little more information before I know exactly what's going on.
alright so i screwed the wires to the terminal of the battery and then plugged it into the computer, i wasn't sure what was supposed to happen and when nothing did for a while i plugged it into the wall charger and it started booting up.(i know you advised not to do it but i did it before reading your post) In fast boot menu at that point it would tell me "battery ok". So i went on and tried to plug it into the pc ac well with a normal cable and everything was fine RSD lite saw it i extracted the fast boot files and then when i press start it comes back with the fail error and stops straight away on the first step. I tried flashing different versions of the software and no good. I waited for my battery to charge (it now says battery ok even when unplugged ) still no good. Then read your post and did it the way you explained, still no good. Exactly the same error every time. And if i press the peer button while in fast boot to power off it would come back to ap fast boot by itself and at the top it would say "flash failed" or something like that. I tries re-installing the ADK tools or whatever its called and still nothing.
So i found a very good russian website that explains how to use moto-fastboot to install the system.img through the terminal and i have everything and the fast boot thing is on c:\ directly and i go into the terminal as an admin and whenever i write in moto-fastboot it comes back with "moto-fastboot isn't recognized as an internal or external command..." no matter what i do.. i've looked for a solution the whole day, can someone please help me
Thanks

[Q] Charging / Connecting to PC

My Nook charges fine when turned off but does not charge at all when powered on. My nook also does not show up as a connected device when I plug it into my computer. I am rooted running CM9. Any advice?
Thanks
mikenexus said:
My Nook charges fine when turned off but does not charge at all when powered on. My nook also does not show up as a connected device when I plug it into my computer. I am rooted running CM9. Any advice?
Thanks
Click to expand...
Click to collapse
IF you mean that it doesn't charge while the screen is on and connected to the PC, that's normal behavior... the current draw is too much for the USB port to maintain the operational draw as well as provide any extra to charge it. Most of the time, you'll notice that you're actually still losing charge even though it's plugged into the PC... albeit at a much slower rate than usual.
As far as it not being recognized... what do you mean? You don't get the drives mounted? It's not being recognized by ADB? There's plenty of threads related to ADB, try giving it a search. If you mean that the drives aren't being recognized, you have to have a SD card in and turn on USB Sharing (or whatever it's actually called) it should be in the notification area.
Thanks for the reply,
It does not charge from an outlet while powered on; only when powered off.
What I mean in regards to it not showing up on the PC: I plug it in and it does not even recognize a device is plugged in - I don't even get to the install new drivers part. Its as if nothing was ever plugged to begin with.
The nook is recognized when I use my galaxy nexus usb cord and attach it to the computer. I am starting to think this is a hardware issue; I just find it strange that the hardware works as intended while the Nook is powered off.
Mike
There's a chance that you have a broken Nook cable then.
Try getting a battery monitoring app to see what sort of current you're getting while it's on. Is the "n" on the cord lighting up while it's plugged in and on?
Yes, when it is on and plugged in the "n" is green no matter the charge
I think you should try a different Nook cable, they can do that for you at B&N's actual store without you having to buy a new cable. If that doesn't work I would wager that it would be the port.
Now, I feel I should point out that for reasons unknown to me that manual specifically says you should not plug the unit in to charge while the unit is off. As I said, I don't know why. I know I have done that with my iPhone when I need a really fast charge (plug it in, then turn it off) but never had to do that with the Nook. Just... Some FYI for you.

[Q] Use PC to power on tablet?

Hello everyone, newb here. First off I woud like to thank everyone who contributed on how to root android tablets hee re, as I was able to root my Insignia flex 8 because of this site.
I do have a question about my Insignia. a few weeks back water spilled into the headphone jack, and no I didn't do anything special to dry it as I was at work, and of course it was powered on. Since then the power and volume buttons haven't worked (shorted I suppose), so I've always kept it charged and woke it up by inserting my micro sd card. As I feared would happen one day, the battery died and the tablet turned off before I could stick it on the charger. Of course the power button still doesnt work.
Since my tablet is rooted, is there a way I could use apk manager or something to power on my tablet from a pc? Give it a jolt or something? Will the pc software even recognize the tablet without it being powered on while plug in?
At this point anything will help. Thanks for everyones time and consideration.
Insignia Flex 8 black
duel core rockchip 1ghz?

SGP512 faulty screen?

Hello and good day.
I wondering if anyone here knows the Xperia Z2 Tablet well enough to help me proceed to the next step in getting my xperia z2 tablet back in working order.
A little history; I used the tablet on/off when I first bought it, then life took over and I had no time or use for the tablet. Now with a new job starting in 2 weeks time, I could very much do with getting the tablet to work.
I thought the tablet was in some sort of Sleep of Death but it appears that was not the case; I originally tried all the different button combinations, letting it discharge and recharge, used PC Companion to repair, Used Flashtools to repair.
Now, the strange bits; the tablet won't respond to button presses UNLESS I have the micro usb cable plugged in either by charging or connected to a PC/Laptop; whilst connected to a charger it will do the 3 vibrations/led routine. when connected to PC/Laptop it will pretty instantly go in to fastboot mode. and this is the strange part, reboot the device in to system (I also have to quickly remove the USB cable) and can hear it boot up.
all that happens with NOTHING on the screen.
So I had an idea; I attached an MHL cable. Lo and behold I have a picture on my TV, but still nothing on the tablet.
So does any one know where to go from here? could it be a lose connection to the screen??
Seems like a faulty logic/mother board
just need to find a source..

Android tablet as car HeadUnit. HELP! Make android boot faster, or enter Ultra Suspension mode

Hi, so i am doing a project to attach my tablet device to my car, as a head unit. My plan is to mainly use a carlinkit adapter, so i have carplay or android auto. So i have been in this project for almost 4 months, and so far i manage to do the following:
1) Otg and power, at the same time:
So i needed my microusb to use otg, for the carlinkit adapter, and after days of research i acknowledge that there is only some device that support this simultaneous feature with a Y cable, and some custom roms. Since my device doesn´t support any, i decided to charge it directly. After a lot of thinking and research, i recognize that the battery may be a problem, since it can overheat VERY EASILY, and to charge it without the charging port was almost impossible. So i decided to remove it completely, i used a YouTube video of a nexus device tutorial to do the exact thing, of attaching a tablet to a car. (
), but my device is a more simple/generic tablet, so there were just two connectors, so i just soldered two cables directly.
* Something to point, is that it will only work with the otg device, with some specific power hub (as power hub i mean, the connector to the power plug), i still am trying to understand witch specific. But i manage to make it work with a 3.4 A adapter power hub of my car.
2) Rooted my device for optimization and personalization:
So i manage to root my device, and using some root optimization app, increase it´s speed, and remove some unnecessary files. I also changed the bootanimation so it fits more my car.
*HELP*, so when powering my device on, there is first a boot logo, of my device brand, and then the boot animation, i only manage to change the second one. The first one i can´t manage to change it, i saw some videos about splash image, and logo file, but it didn´t work.
IF someone could help me with that, will be appreciated.
So now i have installed it to my car, and it is working very nice. EXCEPT FOR:
BOOT LOGO, as explained before.
THE BOOT TIME.
So since it is connected to the car. when i turn the keys on, the device turns just after, but it takes like 1 minute and 30s, to completely boot, and connect to my device carplay.
I would like to make that speed up, as much as it can. I read some forums, about disabling the bootanimation, and after trying that, it didn´t have that much effect, almost the same. Another thing was disabling startup apps, so i already did that.
With the research i learned about timur´s kernell, for the nexus 7 i believe, that allows the device when disconnected, to enter a suspend mode, with a power event manager, and when it get power, it just wakes in seconds (really fast). That would be very nice to have
SO if someone could help me on that would be nice.
Thanks in advance !

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