Power button working when turning on but not working when booted

Hey Guys, So two things happened so i cracked the screen last week and ordered a new digitizer on amazon and the other day my ipad got submerged in water and wasn't working and yesterday a bag of rice fixed my IPad and my new digitizer came but my power button seems not to be working i thought replacing the digitizer would fix it but it didn't power buttton only works when powering the device on from shutdown state but when my IPad is booted to IOS the power button is not working and also touchscreen and the touchscreen weren't also working before i replaced the digitizer and reflashing the firmware and restoring didn't fix it the only way i can turn on my device is pressing the home button in The OS but it works pretty fine i can go to recovery mode but it's not working in The OS Itself sorry for my poor english