any idea for 3310 lcd no display?

3310 no display afther changing the ccont.
this 3310 was a faulty set before, it cant be on, so i managed to repair the phone in good condition (it worked fine) but there is no display on the LCD, (i had replaced a new LCD as well, but still no display)
can anyone kindly tell me the solution of this problem???

hi
check this

Hi

Is original part?

If is'nt original part replace elastomer (gum) or replace for original part