Sony PCG-K415B User Manual page 108

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Connecting peripheral devices
VGN-A series is equipped with the DVI-D connector.
DVI-D stands for Digital Visual Interface - Digital. It is a kind of DVI connector that only supports digital video signals, so no analogue video signals. It has 24
pins.
A DVI-I connector (Digital Visual Interface - Integrated) supports digital video and analogue video signals. It has 29 pins.
!
You can not connect a DVI-I to VGA cable to a DVI-D connector!