My Lenovo K900 won't turn on although I charged it for the whole night?

Leave it charging over night then try to turn it on again by holding the power button real long. Try few times, if that does not help then try

try to find some rom whit the firmware files:

FW_DNX: CLAK_FwDnX_CLVP_20.24.bin
IFWI: CLAK_IFWI_CLVP_vF9.54_ww19_001_SOS.bin
OS_DNX: CLAK_OsDnX_CLVP_20.24.bin
OS IMAGE: pos.bin

You can find these files inside these roms just google it:

K900_ROW_0708_RootedByMouz.rar

K900_1_S_2_019_0142_130927_DVT3_CPsign…

2) Download and install the Intel®USB Driver for Android Devices at:

http://software.intel.com/en-us/android/articles/intel-usb-driver-for-android-devices

You must pretty shure all the drivers are installed correctly be patient and wait for Windows finish install all the drivers.

3)Download and install the xFSTK at:

https://dl.dropboxusercontent.com/u/26833962/K900%20Tools/xFSTK%2Bv1.3.6.rar

4) Uncompress the rom an load the firmware files FW_DNX, IFWI, OS_DNX, OS IMAGE. This is the most important step whit the device plugged and turn off, press Begin download in xFSTK, the tool will start to find the device, immediately just press and hold on the power button + volume up, the K900 wake up for 3 seconds just to be catch for the xFSTK.

5) At this point it supposed we should have an android fastboot device, but didn't works for me at my Windows so I had to change an plug my device into my Mac, that not means Win will not work whit others, we can do a test whit the command "fastboot devices" it should printout out cloverfield… Device.

6) So whit fastboot mode, we can proceed to flash the files from the uncompresed rom:

fastboot oem start_partitioning
fastboot flash /tmp/partition.tbl partition.tbl
fastboot oem partition /tmp/partition.tbl
fastboot erase factory
fastboot erase logs
fastboot erase cache
fastboot erase config
fastboot erase data
fastboot erase spare
fastboot erase system
fastboot oem stop_partitioning
fastboot flash system system.img.gz
fastboot oem checksum
fastboot flash radio radio_firmware_6360.bin
fastboot flash /tmp/NV_130119.tlv NV_130119.tlv
fastboot flash splashscreen rocket_start_logo-1080,480-2.bmp.stitche…
fastboot oem nvm apply /tmp/NV_130119.tlv
fastboot flash fastboot droidboot.img
fastboot flash recovery recovery.img
fastboot flash boot boot.bin

7)If everything results ok, just reboot the device:
fastboot reboot

************************

* Alternative method *

************************

There's another tool MFT

https://dl.dropboxusercontent.com/u/26833962/K900%20Tools/ManufacturingFlashTool_Setup_6.0.2.exe

This tool just need load the file flash-DVT3-CPU-sign.xml from the uncompressed rom, I didn't test but it should be the same procedure, the matter is the 3 seconds to catch the Android device.

There's a video:

I don't understand what he said but its pretty graphical.