Display Dead After Battery/Charge Port Replacement

I replaced the battery and usb-c charge port of my device. Before sealing the back cover on, I checked that the device turned on and functioned normally. I was able to unlock phone and open a few apps without any abnormalities.

However, after I turned the device off, sealed the back cover, then restarted the device, I noticed white lines going horizontally across the screen, as well as flickering. The display's colors seemed to be distorted as well. I tried restarting the device and charging it but it only made it worse.

It's now to the point where the display will not turn on anymore, though I'm still able to hear the phone's vibrator and alarms going off.

I've tried replacing the new components with the old battery and old usb-c charge port but I didn't notice any changes. I've even tried reseating all the connectors and looking for any damage to the pins and ribbon cables.

Things that could have gone wrong:

• when removing the battery, some 91% isopropyl alcohol did spill into the rest of the components
• screws may have gotten mixed up (most of them seem to be the same size however & I made sure everything was fixed well into place)

Does anyone have any idea what else I could try doing to troubleshoot? It's really strange because my device seem to work perfectly fine initially and only got worse after charging. Any help would be VERY much appreciated.