[mransah]

i just flashed my infinix zero 3 but i get white screen after the flash and also i tried a different rom model but still the same

[xerxes]

i just flashed my infinix zero 3 but i get white screen after the flash and also i tried a different rom model but still the same

White screen might be an incompatible lk.bin, refer to https://www.hovatek.com/forum/thread-1667.html .
Do you hear anything like background sound/touch vibration to verify if the phone is booting to homescreen? 
Did you take note of the phone's build no. before flashing the phone?

[X3non]

i just flashed my infinix zero 3 but i get white screen after the flash and also i tried a different rom model but still the same

thats due to incompatible lk.bin, you need to flash the correct rom for your build
did you take note of the build number of your phone before flashing?
have you tried the two different builds listed at https://www.hovatek.com/forum/thread-19959.html

[mransah]

i didnt check the build number and also i havent tried the two rom but one.. and also i do get sound feedback when i press the volume up key

[xerxes]

i didnt check the build number and also i havent tried the two rom but one.. and also i do get sound feedback when i press the volume up key

Try the other ROM and see if it will work.