Searching for specific software components like "part4.rar" often indicates a firmware package that has been split into multiple compressed files for easier sharing on unofficial forums. For the Philips 43PUT7791/V7

: You can check for the latest firmware under the "Software and Firmware" section.

: If the TV is frozen, press the Home button five times, Up arrow once, Rewind twice, and Fast Forward twice to force a restart.

The most reliable way to obtain software for this model is directly from the official Philips Support page .

: Navigate to Settings > System > Advanced system settings > Factory reset to restore original settings. Some models also have a physical reset pinhole near the ports that you can hold for 30 seconds.