Acer AL702 AL702 User Guide - Page 15

English AL702 13 TROUBLESHOOTING Before sending your LCD monitor for servicing, please check the troubleshooting list below to see if you can self-diagnose the problem. Problems Current Status Remedy LED ON • Using OSD, adjust brightness and contrast to maximum or reset to their default settings. LED OFF • Check the power switch. No Picture • Check if AC power cord is properly connected to the monitor. LED displays amber color • Check if video signal cable is properly connected at the back of monitor. • Check if the power of computer system is ON. Unstable Picture • Check if the specification of graphics adapter and monitor is in compliance which may be causing the input signal frequency mismatch. Display is missing, • Using OSD, adjust RESOLUTION, CLOCK, center shift, or too CLOCK-PHASE, H-POSITION and V- Abnormal small or too large Picture in display size POSITION with non-standard signals. • Using OSD, in case of missing full-screen image, please select other resolution or other vertical refresh timing. • Wait for a few seconds after adjusting the size of the image before changing or disconnecting the signal cable or powering OFF the monitor. Abnormal No sound, or Sound sound level is too low • Check the audio cable with the host PC is connected. • Check the setups of the host PC a minimum or off status.