Philips LC1241 User Guide - Page 34

12. TROUBLESHOOTING If a fault occurs, first check the points listed below before taking the projector for repair. If you are unable to remedy a problem by following these hints, consult your dealer or service organisation. WARNING Under no circumstances should you try to repair the projector yourself as this could invalidate the warranty. PROBLEM • CHECK 480P IMAGES DO NOT APPEAR • Set the resolution mode to 480P. (See page 17) NO PICTURE AND NO SOUND. • Projector powercord is not plugged into the wall outlet. • The bottom filter cover is not securely installed. • Selected input is wrong. (See pages 15) • Cables improperly connected to rear panel of the projector. (See pages 12-14) • Remote control batteries have run down. (See page 10) • On-screen Display ('AV-MUTE') is turned off and AV-Mute function is turned on, creating a black image. (See page 23) AN UNUSUAL SOUND IS OCCASIONALLY HEARD FROM THE CABINET • If the picture is normal, the sound is due to cabinet shrinkage caused by temperature changes. This will not affect operation or performance. MAINTENANCE INDICATOR LIGHTS UP • Refer to 'Lamp/Maintenance Indicators' on page 29-30. POWER CANNOT BE TURNED ON OR OFF USING THE POWER BUTTONS (ON/OFF) OF THE PROJECTOR • Keylock level is set to "Level A" or "Level B", preventing operation of some or all buttons (See page 26) SOUND IS HEARD BUT NO PICTURE APPEARS • Cables improperly connected to rear panel of the projector. (See pages 12-14) •'Contrast' and 'Bright' adjustments are set to minimum position. (See page 19) PICTURE APPEARS BUT NO SOUND IS HEARD • Cables improperly connected to rear panel of the projector. (See pages 12-14) • Volume is set to minimum. (See page 20) COLOUR IS FADED OR POOR •'Color' and 'Tint' adjustments are not correct. (See page 19) COLOUR IS DISTORTED (EXCEPT FOR VIDEO MODE) • Change the input signal type. (See page 15) PICTURE IS BLURRED • Adjust the focus. (See page 10) • Projection distance is too long or too short to allow for proper focus. (See page 9) AFTER REPLACING LAMP, THE PREVIOUS STATUS REMAINS UNCHANGED. • Reset the lamp timer. (See page 31) LENS COMES OFF • Align the mark on the lens with the corresponding mark on the projector, push the lens firmly in place, and rotate to the right. PICTURE NOISE APPEARS • Adjust the phase setting. (See page 18) • Noise may appear when used with certain computers. 32