Download the correct firmware for 32PFT5500/12 from the official Philips support website (search for your exact model).
Insert the USB stick into a USB port on the TV (preferably USB 1). How to Hard Reset PHILIPS 32PFT5500 12
Unplug the TV.
Scroll to the bottom and select Reinstall TV or Factory settings (wording may vary slightly by firmware version). Download the correct firmware for 32PFT5500/12 from the
Format a USB stick as FAT32 (not NTFS or exFAT). How to Hard Reset PHILIPS 32PFT5500 12