I can't load in fastboot mode - Xperia Z5 Compact Q&A, Help & Troubleshooting

Hello,
I would like to root my Z5C, but I can't load the phone in fastboot mode.
I tried the following :
adb reboot bootloader (with my phone one, with usb debug)
the phone shut down completely, but nothing is displayed on the screen​
power up + volume up (from my phone shutdowned)
there are three vibrations, and sometimes the logo Xperia appears for a few second, but then the screen show the charging icon​
power down + plug usb (from my phone shutdowned)
nothing appends​
each time, I tried the following command to check if the phone was indeed in fastboot mode :
fastboot devices
but I get nothing (empty list).
Could you help me please?
thanks in advance.

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As far as I know, only the led will light up. The display stays black. Have you looked in the device manager if your device is recognized there. Maybe as an unknown device etc?

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then I probably don't have the correct driver. I installed this one
developer.sonymobile.com/downloads/drivers/xperia-z5-compact-driver
Do you know where I can find the correct driver?
In device manager, I see a new item when I plug my phone :
USB mass storage device
I tried to update the driver with the one mentioned before, but it says that it is already up to date.

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Noneangel said:
Hello,
I would like to root my Z5C, but I can't load the phone in fastboot mode.
I tried the following :
adb reboot bootloader (with my phone one, with usb debug)
the phone shut down completely, but nothing is displayed on the screen​
power up + volume up (from my phone shutdowned)
there are three vibrations, and sometimes the logo Xperia appears for a few second, but then the screen show the charging icon​
power down + plug usb (from my phone shutdowned)
nothing appends​
each time, I tried the following command to check if the phone was indeed in fastboot mode :
fastboot devices
but I get nothing (empty list).
Could you help me please?
thanks in advance.
Click to expand...
Click to collapse
You've got some commands wrong. Volume up plus power is hard reset. You get 3 vibrations then phone is off.
To get into fastboot mode or flash mode you do not use power button and phone needs to be off. Simply hold volume up and plug in USB for fastboot mode, or hold volume down plus plug in USB for flash mode. Blue LED for fastboot and green LED for flash mode.
This is the best option for install and drivers: http://forum.xda-developers.com/showthread.php?p=48915118

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I became a lot more understandable, thanks you.
I tried to install android driver from the topic you suggested (I know I should post in this topic, but I have not enough privileges to do so), but I have the following issue :
after the installation of the drivers, I followed the howto_driver.zip (the device is not recognized), and in step 5, I don't see the "android device" driver.
As suggested by
If you have problem with driver enumeration in Windows 8.1 install update KB2917929
Click to expand...
Click to collapse
I tried to install KB2917929 but during the installation I got
The update is not applicable for this computer​error. After a bit of googleing, I found this
answers.microsoft.com/en-us/windows/forum/windows_8-update/instalation-failure-for-kb2917929/9ebb0567-8923-4f13-8840-61dbe54212e5
Hi ,
The Best Thing To Install KB2917929 Is To Remove The KB2919355 Update
To remove the update, follow these methods:
Press Windows Key + X.
Click on Programs and Features.
Click on View installed updates on the left hand side.
Find the update KB2919355, right click on it and Uninstall​.
After That Re Install The KB2917929 Update And It Will Be Installed
Click to expand...
Click to collapse
But when I tried to uninstal KB2919355 I got this error :
An error has occurred. Not all of the updates were successfully uninstalled​I gave up and tried to install the usb driver from a folder. I downloaded the following driver : developer.android.com/studio/run/win-usb.html
but when I tried to update the driver, I get a message error saying
windows could not find driver software for your device.​I run out of option (I might try this with linux, but I have no machine running under linux right now).

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try forcing install of the driver by selecting the unknow device/detected phone and update/install driver by "find software driver in pc" then "choose manually driver from a driver list" then "driver disk" button on the right, "explore" and go the folder and select the downloaded driver. Be sure to install the correct driver described in the guides.

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I get the following after selecting the "driver disk" :
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
I suppose that by explore you mean Have disk.
I tried to select the usb driver directory, and I get the following error :
The folder you specified doesn't contain a compatible software driver for your device. If the folder contains a driver, make sure it is designed to work with Windows for x64-based system​The folder I selected is the unzip of the driver from developer.android.com/studio/run/win-usb.html

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I'm not much help with Windows, I'm still running XP lol

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civicsr2cool said:
I'm not much help with Windows, I'm still running XP lol
Click to expand...
Click to collapse
LOL kinda old school these days :cyclops: