Help my device doesnt turn on completly

[mikida]

hey, when i am trying to turn on my gs2 its comming just to the logo of the rom but not further (wich means i cant see my homescreen or apps and such, and i do not have any access to my data).
i tried to swich the rom but its still happening.
pleas help me! i dont know what else can i do, all my schedule is in it.
thanks!
p.s. i dont sure if its relevant, but before the first time this problem appered i dropped my phone (not from high distance though).

 

[Hawker]

Boot into recovery (vol up+ home+ power) and wipe cache. If you are rooted also wipe dalvik.

If this still fails then you will have to flash a kernel, and falling that, a firmware flash through odin.

 

[QueenEve]

I do have the same problem , I tried with the home + vol up + power but it didnt work out

any other solution please?

 

[mikida]

Boot into recovery (vol up+ home+ power) and wipe cache. If you are rooted also wipe dalvik.

If this still fails then you will have to flash a kernel, and falling that, a firmware flash through odin.

i think my phone is not rooted anymore because i flashed stock rom lately...
and this wipe cheche thing doesnt work. any other solutions?