[D5303] Strange! No FlashMode or fastboot! [HELP]

[RootAgain]

Hello guys
I forgot my Xperia T2 D5303 Pattern and i didn't use my gmail account to link it, thus i didn't set up passcode in case i forgot my pattern
I've tried to flash my T2 via FlashTool but i couldn't enter my T2 to Flashmode or fastboot
When i press VOL- and insert cable phone goes to charging and green battery icon appears.
I'm pretty sure that my T2 volume buttons working!
But the phone refuses to go flashmode or fastboot
The led is red or orange (when charging).
I tried using other Computer and different FlashTool versions,cables but i get the same...
P.S. Im on lolipop.
Please i really need your help since i can't use my T2
Thnx in advance.

 

[Grajatyadav]

Visit service centre or try with old flashtool version or try to repair by Sony pc companion..
For Sony companion click on update then repair my phone then select your device then it will download and ask u conect your phone
If all this not working make a prerooted zip by prf creater intall bt recovary

 

[The_Overthinker]

Are you sure the correct flashmode and fastboot mode drivers are installed in the computer?

 

[GeheimeStaatspolizei]

I am having the same issue. I have quite and experience in installing custom ROMs on Sony phones and in particular, my Xperia S with Flashtool. I have also installed the latest version of Flashtool and proper drivers on multiple computers (Vista and Windows 10). The Flashtool Mode gets recognized but only for a couple of seconds then it will not respond further.