[Sony Ericsson XPERIA X10 Mini] ribafish:
Thanks, now it flashed allright, but it still doesn't work... here's the log, if it helps:

14/036/2012 18:36:59 - INFO - <- This level is successfully initialized
14/036/2012 18:36:59 - INFO - Flashtool Version 0.6.8.0 built on 2012-02-26 19:26:25
14/036/2012 18:36:59 - INFO - You can drag and drop ftf files here to start flashing them
14/037/2012 18:37:14 - INFO - Device disconnected
14/038/2012 18:38:18 - INFO - Starting bundle creation
14/038/2012 18:38:18 - INFO - Adding loader.sin renamed as loader.sin to the bundle
14/038/2012 18:38:18 - INFO - Adding kernel.sin renamed as kernel.sin to the bundle
14/038/2012 18:38:18 - INFO - Adding amss_fs.sin renamed as amss_fs.sin to the bundle
14/038/2012 18:38:18 - INFO - Adding system.sin renamed as system.sin to the bundle
14/038/2012 18:38:21 - INFO - Adding fota1.sin renamed as fota1.sin to the bundle
14/038/2012 18:38:21 - INFO - Adding fota0.sin renamed as fota0.sin to the bundle
14/038/2012 18:38:21 - INFO - Adding amss.sin renamed as amss.sin to the bundle
14/038/2012 18:38:22 - INFO - Adding userdata.sin renamed as userdata.sin to the bundle
14/038/2012 18:38:22 - INFO - Adding cache.sin renamed as cache.sin to the bundle
14/038/2012 18:38:22 - INFO - Finished bundle creation
14/038/2012 18:38:33 - INFO - Selected u20i_2.1fr_debrand.ftf
14/038/2012 18:38:33 - INFO - Preparing files for flashing
14/038/2012 18:38:33 - INFO - Please connect your device into flashmode.
14/038/2012 18:38:45 - INFO - Device connected in flash mode
14/038/2012 18:38:45 - INFO - Opening device for R/W
14/038/2012 18:38:46 - INFO - Reading device information
14/038/2012 18:38:47 - INFO - Phone ready for flashmode operations.
14/038/2012 18:38:47 - INFO - Start Flashing
14/038/2012 18:38:47 - INFO - Flashing loader
14/038/2012 18:38:48 - INFO - Loader version : R4A045 / Bootloader status : UNROOTABLE
14/038/2012 18:38:48 - INFO - Flashing kernel.sin
14/038/2012 18:38:52 - INFO - Flashing amss_fs.sin
14/038/2012 18:38:52 - INFO - Flashing fota1.sin
14/038/2012 18:38:52 - INFO - Flashing fota0.sin
14/038/2012 18:38:53 - INFO - Flashing amss.sin
14/039/2012 18:39:03 - INFO - Flashing cache.sin
14/039/2012 18:39:03 - INFO - Flashing system.sin
14/040/2012 18:40:38 - INFO - Flashing userdata.sin
14/040/2012 18:40:46 - INFO - Flashing finished.
14/040/2012 18:40:46 - INFO - Please wait. Phone will reboot
14/040/2012 18:40:46 - INFO - For flashtool, Unknown Sources and Debugging must be checked in phone settings
14/040/2012 18:40:46 - INFO - Device connected in flash mode
14/040/2012 18:40:48 - INFO - Device disconnected
14/040/2012 18:40:50 - INFO - Device connected in flash mode
14/041/2012 18:41:11 - INFO - Device disconnected
14/041/2012 18:41:16 - INFO - Device connected with USB debugging off
14/041/2012 18:41:16 - INFO - For 2011 devices line, be sure you are not in MTP mode
14/041/2012 18:41:36 - INFO - Device disconnected

As I said, there is nothing different...when I turn it on. the phone vibrates and a bit of backlight comes, but the screen is black and nothing happens...after a few seconds the backlight turns off, and about 20-30s after that the backlight comes back on....and thats the loop. The LED above the screen doesn't do anything during this...but it works, as its green while charging...when connected to PC. So, anything else I might try? Should I leave something out when creating the bundle?

EDIT: I went over it with pc companion's repair, but still the same story...