Default Xperia T lt30p Not able to enter in flash or fastboot mode

Its embarrassing because i've been using android for 2 years. I rooted my phone unlocked bootloader & used many custom & stockbased custom roms. I was flashing a mod, mistakenly i chose wrong file. It wiped my system. then I rebooted & saw sony logo after that black screen. No led light. No charging. I tried pressing power button+Vol up key. It responds & reboots & again comes sony logo & black screen. I tried getting it in flashmode & fastboot mode. But its unresponsive. I think I should turn off my phone first then boot into fastboot. But how can i turn off? it only reboots. Please help.

Last Rom Used: Ultimate BlackXT v1
Xperia T LT30p
Rooted & Bl Unlocked
Device: Xperia™ T LT30p
(Rooted & BL Unlocked)
Rom: Ultimate PureXT v3.0 (9.2.A.1.205)
Kernel: Integrated 4.3 PhilZ Touch CWM v1.7

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