Completely dead K750i

A while ago I flashed my K750i to W800i R1CA021 (or sth like that). It worked fine for a week and suddenly it stopped playing ringtones and use vibrations when someone called or texted me. First thing that I've done was turning it off but it won't turn on anymore :/

I tried to use another battery from T280i but there's no difference, phone worked on it before. Red led on the top is not blinking, xs++, seus and setool lite can't see the phone (holding C and 2+5). It's not responding to charger or anything else. Tried to remove sim and memory card with no effect. Also took off battery sim and memory and waited for whole night - still the same :/ I don't know what to do. My phone acts like I'd connect a plastic box to computer...

Please help!

there might be a problem with the flash IC, the problem starts with not playing ringtone, no vibration. that means it's a hardware problem

just reheat the flash ic and try..

Here is u r flash ic..
http://tinyurl.com/ycn2vs5

Thanks! It is working perfectly!

So, what did you do exactly to get it to work? Did you literally reheat the flash IC? I've the same symptoms with a w760i.

Yup, I reheated Flash IC and it's back to life :)

OK..will try it after double check battery still good

when i was updating using usb cable and at half the stage while it was down loading to my k750i phone usb cable was disconnected and after this all now my phone is totally dead or what it is not starting please help me

try this tutorial here : XS++ 3.1 Guide-Flashing, Customizing, Recovering and post log