The display of the cell phone mentioned is broken due to water damage, you can hardly see anything anymore, so I couldn't download an app to transfer the screen to the laptop. Is there another way to transfer the data without using the cell phone?
I see two possibilities:
Install MyPhoneExplorer on both devices, connect with a USB cable or WLAN. Then click on "Control mobile phone" in the extras menu on the PC. Smartphone display appears on PC monitor. OR
Install TeamViewer on the PC, install QuickSupport on the smartphone. Smartphone display appears on PC monitor.
TeamViewer is probably more powerful in this situation. One thing is clear: both are only temporary solutions until the J5 display has been replaced.