[Sony Xperia P, U, Sola, Go] brainzilla:
Searched the forum but found nothing to fit my problem (at least no thread with a solution...)

I have an Xperia U with ICS ST25i_6.0.B.3.184_Generic_World.

Rooted, unlocked.

Was dreadfully slow and cashed all the time, so i tried to restore the factory default with the Sony Bridge for Mac.

That started, the failed mid-process and told me that he cannot communicate with the installer on the phone.

Of cause boot-up was not happening anymore after this - just a short xperia logo and then some icon telling me that it won't start.

Tried to use flashtool several times.

Flashmode starts, logs this to the console and dowsn't seem to do anything substancial afterwards:

08/028/2013 22:28:51 - INFO - (MainSWT.java:131) - Device connected in flash mode
08/028/2013 22:28:51 - DEBUG - (SinFile.java:272) - Header size : 1020
08/028/2013 22:28:51 - DEBUG - (SinFile.java:272) - Header size : 35632
08/028/2013 22:28:51 - DEBUG - (SinFileHeader.java:96) - Sin version 2 ; Partition block count : 2097152 ; Partition block size : 512 ; Partition size : 1.0Gb
08/028/2013 22:28:51 - DEBUG - (SinFile.java:272) - Header size : 4308
08/028/2013 22:28:51 - DEBUG - (SinFileHeader.java:96) - Sin version 2 ; Partition block count : 4194304 ; Partition block size : 512 ; Partition size : 2.0Gb
08/028/2013 22:28:51 - DEBUG - (SinFile.java:272) - Header size : 1438
08/028/2013 22:28:51 - DEBUG - (SinFileHeader.java:96) - Sin version 2 ; Partition block count : 32768 ; Partition block size : 512 ; Partition size : 16.0Mb
08/028/2013 22:28:51 - DEBUG - (SinFile.java:272) - Header size : 1279
08/028/2013 22:28:51 - DEBUG - (SinFileHeader.java:96) - Sin version 2 ; Partition block count : 6144 ; Partition block size : 512 ; Partition size : 3.0Mb
08/028/2013 22:28:51 - DEBUG - (SinFile.java:272) - Header size : 1069
08/028/2013 22:28:51 - DEBUG - (SinFileHeader.java:96) - Sin version 2 ; Partition block count : 256 ; Partition block size : 512 ; Partition size : 0.128Mb
08/028/2013 22:28:51 - DEBUG - (SinFile.java:272) - Header size : 1689
08/028/2013 22:28:51 - DEBUG - (SinFileHeader.java:96) - Sin version 2 ; Partition block count : 16384 ; Partition block size : 512 ; Partition size : 8.0Mb
08/028/2013 22:28:51 - DEBUG - (SinFile.java:272) - Header size : 1602
08/028/2013 22:28:51 - DEBUG - (SinFileHeader.java:96) - Sin version 2 ; Partition block count : 512000 ; Partition block size : 512 ; Partition size : 250.0Mb
08/028/2013 22:28:51 - DEBUG - (SinFile.java:272) - Header size : 1020
08/028/2013 22:28:51 - DEBUG - (SinFile.java:272) - Header size : 1438
08/028/2013 22:28:51 - DEBUG - (SinFileHeader.java:96) - Sin version 2 ; Partition block count : 32768 ; Partition block size : 512 ; Partition size : 16.0Mb
08/028/2013 22:28:51 - DEBUG - (SinFile.java:272) - Header size : 1028
08/028/2013 22:28:51 - DEBUG - (SinFile.java:272) - Header size : 542856009

The green LED goes off after some 20 or 30 seconds and nothing happens.

Phone is stuck with the red loading-LED on and won't do anything afterwards.

Holding VolUp + Power after battry-cycling just makes the blue LED blink once and gives single vibration.

Then the phone goes into the red-LED stasis as well.

The screen doesn't show anything anymore at any time / action.

Is there still hope or will I open a second thread to ask for new phone recommendations?