IBM 24P4555 User Guide - Page 15

US-8 TECHNICAL FEATURES Preset modes Mode Resolution (H x V) V. Freq. (Hz) 1 640 x 480 2 640 x 480 60 (VESA) 75 (VESA) 3 640 x 480 85 (VESA) 4 720 x 400 70 (Ind. Standard) 5 800 x 600 60 (VESA) 6 800 x 600 7 800 x 600 75 (VESA) 85 (VESA) 8 1024 x 768 60 (VESA) 9 1024 x 768 75 (VESA) 10 1024 x 768 11 1152 x 864 85 (VESA) 75 (VESA) Note for Windows users For Windows users, check your graphics board manual or the utility program which comes with graphics board and select the highest available refresh rate to maximize monitor performance. Power Saving Function The monitor will be driven into "Power Saving" mode by the control signal from the display controller, as indicated by the amber-color power LED. State ON Active OFF Power Consumption Normal < 5W LED Light Green Amber The power saving states will be kept until a control signal has been detected or the keyboard or mouse is activated. The recovery time from Active OFF state back to ON state is around 10 seconds. TROUBLESHOOTING Before contacting technical support, refer to this section. Problem Blank screen Display position off-center Display too small or too large Display too bright or too dim Check & Adjust · Monitor power switch, power cord, signal cable, or connector · Computer power switch · Brightness & contrast controls · Vertical centering & horizontal phase controls · Vertical & horizontal size controls · Brightness & contrast controls Refer to the operation instructions of your computer/ video adapter to ensure that you have the correct signal output source for the monitor. Ensure that the switches on the video adapter are set correctly for operation with this monitor. If the above steps fail to correct the problem contact your dealer for servicing by qualified service personnel.