Large screen only display part of the image, Signal need to scale, No display in the second half part of large screen – RGBLink VSP 3550S User Manual User Manual
Page 83: Resolution is inadequate, All key lights light simultaneously, Check if dial switches are normal

VSP 3550 User Manual 83
Large Screen only Display Part of the Image
Signal need to scale
Press 【SCALE】button in the processor and knob to adjust the actual
screen size of the screen, combined with button【POSITION】, including "H
SIZE" and "V SIZE", push the knob to confirm.
No Display in the Second Half Part of Large Screen
Resolution is inadequate
Please make sure the points of the screen width and heigh, choose the
resolution to be bigger than screen width by push button [MENU], and
choose [OUTPUT FORMAT] option, push the knob to confirm.
All Key Lights Light Simultaneously
Check if dial switches are normal
Power off, check if two red dial switches near CV are upward. Reboot if
they downward, and reboot. The function of the red dial switched is for
upgrade.