The easiest way to update is through the TV's menu, provided it is connected to the internet: Open the menu using your remote. Navigate to Device Preferences > About > System Update .
: Extract the downloaded .rar file. You should typically see a file named Update.bin or similar . Download TCL L32B2620S Software rar
If you are looking to update your TV's firmware, you generally have two reliable methods: 1. Direct Network Update The easiest way to update is through the