Vivitek RP56HD21-A - Manual (Page 32)

Using RGB Video
To connect your computer using RGB video :
1 Connect the 15-pin D-Sub RGB connector on your computer to the
RGB-IN connector on the back of your RPTV.
2 Connect the Audio Out jack on your computer to the RGB Audio In jacks
on the back of your RPTV.
3 Select RGB using the INPUT button on the front of your RPTV.
Please refer to page 46~48 as the related resolution supported timing table.
Audio Video