[Xperia Arc Android Development] gvshil:
Such problem: phone LT15i was switched-off and not loaded, at connection to power, to a computer do not burn indicators.

At flash by means of Flashtool such broad gully:

23/054/2014 11:54:04 - INFO - <- This level is successfully initialized

23/054/2014 11:54:04 - INFO - Flashtool Version 0.9.15.0 built on 15-03-2014 23:00:00

23/054/2014 11:54:08 - INFO - Device disconnected

23/054/2014 11:54:18 - INFO - Selected Bundle for LT15i. FW release : 4.1.B.0.587. Customization : Generic Global World

23/054/2014 11:54:18 - INFO - Preparing files for flashing

23/054/2014 11:54:19 - INFO - Please connect your device into flashmode.

23/054/2014 11:54:27 - INFO - Device connected in flash mode

23/054/2014 11:54:27 - INFO - Opening device for R/W

23/054/2014 11:54:27 - INFO - Reading device information

23/054/2014 11:54:27 - INFO - Phone ready for flashmode operations.

23/054/2014 11:54:27 - INFO - Current device : LT15i - CB5A1H95TJ - 1246-8047_R3I - 1241-4324_4.1.B.0.587 - WORLD-1-8_4.1.B.0.587

23/054/2014 11:54:27 - INFO - Start Flashing

23/054/2014 11:54:27 - INFO - Processing loader.sin

23/054/2014 11:54:27 - INFO - Checking header

23/054/2014 11:54:27 - INFO - Flashing data

23/054/2014 11:54:27 - INFO - Processing of loader.sin finished.

23/054/2014 11:54:32 - INFO - Loader : S1_Loader_Root_773f - Version : R4A069 / Boot version : R9A021 / Bootloader status : ROOTABLE

23/054/2014 11:54:32 - INFO - Disabling final data verification check

23/054/2014 11:54:32 - INFO - No bootdelivery to send

23/054/2014 11:54:32 - INFO - Processing kernel.sin

23/054/2014 11:54:32 - INFO - Checking header

23/054/2014 11:54:32 - INFO - Flashing data

23/054/2014 11:54:34 - INFO - Processing of kernel.sin finished.

23/054/2014 11:54:34 - INFO - Processing fota1.sin

23/054/2014 11:54:34 - INFO - Checking header

23/054/2014 11:54:34 - INFO - Flashing data

23/054/2014 11:54:35 - INFO - Processing of fota1.sin finished.

23/054/2014 11:54:35 - INFO - Processing fota0.sin

23/054/2014 11:54:35 - INFO - Checking header

23/054/2014 11:54:35 - INFO - Flashing data

23/054/2014 11:54:36 - INFO - Processing of fota0.sin finished.

23/054/2014 11:54:36 - INFO - Processing adsp.sin

23/054/2014 11:54:36 - INFO - Checking header

23/054/2014 11:54:36 - INFO - Flashing data

23/054/2014 11:54:38 - INFO - Processing of adsp.sin finished.

23/054/2014 11:54:38 - INFO - Processing amss_fs_anzu.sin

23/054/2014 11:54:38 - INFO - Checking header

23/054/2014 11:54:38 - INFO - Flashing data

23/054/2014 11:54:38 - INFO - Processing of amss_fs_anzu.sin finished.

23/054/2014 11:54:38 - INFO - Processing amss.sin

23/054/2014 11:54:38 - INFO - Checking header

23/054/2014 11:54:38 - INFO - Flashing data

23/054/2014 11:54:44 - INFO - Processing of amss.sin finished.

23/054/2014 11:54:44 - INFO - Processing system.sin

23/054/2014 11:54:44 - INFO - Checking header

23/054/2014 11:54:44 - INFO - Flashing data

23/056/2014 11:56:07 - INFO - Processing of system.sin finished.

23/056/2014 11:56:07 - INFO - Processing vendor.sin

23/056/2014 11:56:07 - INFO - Checking header

23/056/2014 11:56:07 - INFO - Flashing data

23/056/2014 11:56:38 - INFO - Processing of vendor.sin finished.

23/056/2014 11:56:39 - WARN - This file is ignored : simlock.ta

23/056/2014 11:56:39 - INFO - Ending flash session

23/056/2014 11:56:39 - INFO - Flashing finished.

23/056/2014 11:56:39 - INFO - Please unplug and start your phone

23/056/2014 11:56:39 - INFO - For flashtool, Unknown Sources and Debugging must be checked in phone settings

23/056/2014 11:56:39 - INFO - Device connected in flash mode