Planar PL1520M - Manual (Page 30)

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TECHNICAL SUPPORT (FAQ) (cont.)
CLOCK (pixel frequency) controls the number of pixels scanned by one
horizontal sweep. If the frequency is not correct, the screen shows vertical
stripes and the picture has not correct width.
FOCUS adjusts the phase of the pixel clock signal. With a wrong phase
adjustment the picture has horizontal disturbances in light picture.
For FOCUS and CLOCK adjustment use “dot-pattern” or win 95/98 shut-down
mode pattern.
ERROR MESSAGE & POSSIBLE SOLUTION
NO SIGNAL：
1. Check that the signal cables are proper connected , If the connector is
loose, tighten the connector’s screws.
2. Check the signal-cable’s connection pins for damage.
UNSUPPORTED:
Your computer resolution is out of VESA-SPEC