Vivo V40 Pro/T3 Ultra On Off Patta Flex
The Vivo V40 Pro/T3 Ultra On/Off Patta Flex, also known as the Power Button Flex Cable or Internal Switch, is an important internal component that controls the power and volume key functions of the smartphone. It is a thin, flexible printed circuit (FPC) strip that connects the external physical buttons to the main motherboard, transmitting electrical signals whenever a button is pressed. When the power key is pressed, this flex sends a signal to the power management IC, enabling essential functions such as turning the phone on or off, locking or unlocking the screen, and initiating reboot or recovery modes.
This flex cable is located inside the side frame of the Vivo V40 Pro/T3 Ultra, directly beneath the metal or plastic key assembly. It is manufactured from durable polyimide material with embedded copper pathways that ensure stable signal transmission and flexibility. Over time, the flex may fail due to regular use, bending, or moisture exposure, resulting in non-functional buttons. Replacing this On/Off Patta Flex restores proper power and volume button operation. The replacement part is affordable and easily available in the market, but installation should be performed by an experienced technician to avoid damaging the connectors or nearby motherboard components.
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