If the official site is down, technician forums usually host the full firmware (often as a single .zip or .pkg file) rather than 10+ RAR parts:
Use a FAT32 formatted USB drive (8GB or smaller is best). Download PHILIPS 49PUS7909 Firmware part09 rar
The best way to get official, working firmware is to use the from Philips or a trusted database. 🛠️ Recommendation: Get the Official Version If the official site is down, technician forums
The file inside the archive should usually be named autorun.upg or upgrade.pkg depending on the installation method. If the official site is down
Look for the QV14.1E LA chassis firmware.
Unplug the TV, insert the USB, then plug the TV back in to trigger the update.