User Manual
Page 22
... Maintenance Guarantee Card. 4.3: ViewSonic LCD Warranty LCD_LW02 Rev. 1d 06-30-06 ViewSonic VA1912w/VA1912wb 19 The warranty period for this product in " which results when a static image is displayed on ViewSonic products sold outside the U.S.A. g. ViewSonic shall not be free from : a. Limited Warranty VIEWSONIC® LCD DISPLAY What the warranty covers: ViewSonic warrants its sole option, repair or replace the...
... Maintenance Guarantee Card. 4.3: ViewSonic LCD Warranty LCD_LW02 Rev. 1d 06-30-06 ViewSonic VA1912w/VA1912wb 19 The warranty period for this product in " which results when a static image is displayed on ViewSonic products sold outside the U.S.A. g. ViewSonic shall not be free from : a. Limited Warranty VIEWSONIC® LCD DISPLAY What the warranty covers: ViewSonic warrants its sole option, repair or replace the...
Service Manual
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Do Not Copy VA1912w-2_VA1912wb-2 6. Troubleshooting Flow Chart Defect Mode Light On Test Failure Analysis Repair Testing ※ " Panel Change" Should be Performed to Level 3 Repair Abnormal Display Flash Dots Bright Dot Dark Dot Backlight Light Leakage Mura Image Sticking Brightness spot Particle Dot Defect Image Remain Group Bright Dots Others Cosmetics Defect Check Panel Panel Change NG Next Step TEST A Completed ViewSonic Corporation 37 Confidential -
Do Not Copy VA1912w-2_VA1912wb-2 6. Troubleshooting Flow Chart Defect Mode Light On Test Failure Analysis Repair Testing ※ " Panel Change" Should be Performed to Level 3 Repair Abnormal Display Flash Dots Bright Dot Dark Dot Backlight Light Leakage Mura Image Sticking Brightness spot Particle Dot Defect Image Remain Group Bright Dots Others Cosmetics Defect Check Panel Panel Change NG Next Step TEST A Completed ViewSonic Corporation 37 Confidential -
Service Manual
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Defect Mode Failure Analysis Repair Testing ※ " Panel Change" Should be Performed to Level 3 Repair A Display Noise Power on Display Abnormal Flicker Beat Display Flicker Beat Display Shut Down Display Wave Check PCBA Check Panel Check PCBA Check Panel AD/B Change Power/B Change Inverter/B Change CNT/B Change Panel Change AD/B Change Power/B Change CNT/B Change Panel Change No Backlight Check Adapter Adapter Change Next Step NG TEST B Completed ViewSonic Corporation 38 Confidential - Do Not Copy VA1912w-2_VA1912wb-2
Defect Mode Failure Analysis Repair Testing ※ " Panel Change" Should be Performed to Level 3 Repair A Display Noise Power on Display Abnormal Flicker Beat Display Flicker Beat Display Shut Down Display Wave Check PCBA Check Panel Check PCBA Check Panel AD/B Change Power/B Change Inverter/B Change CNT/B Change Panel Change AD/B Change Power/B Change CNT/B Change Panel Change No Backlight Check Adapter Adapter Change Next Step NG TEST B Completed ViewSonic Corporation 38 Confidential - Do Not Copy VA1912w-2_VA1912wb-2
Service Manual
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... ※ " Panel Change" Should be Performed to Level 3 Repair B Display White Out Check PCBA Booting Delay Brightness Even Abnormal Beat Display No Backlight No signal Check PCBA Check PCBA Check Panel Check Adapter R.G.B Display ... OSD/B Change Power/B Change Inverter/B Change Panel Change Adapter Change AD/B Change CNT/B Change VGA cable DVI cable Panel Change Next Step NG TEST C Completed ViewSonic Corporation 39 Confidential - Do Not Copy VA1912w-2_VA1912wb-2
... ※ " Panel Change" Should be Performed to Level 3 Repair B Display White Out Check PCBA Booting Delay Brightness Even Abnormal Beat Display No Backlight No signal Check PCBA Check PCBA Check Panel Check Adapter R.G.B Display ... OSD/B Change Power/B Change Inverter/B Change Panel Change Adapter Change AD/B Change CNT/B Change VGA cable DVI cable Panel Change Next Step NG TEST C Completed ViewSonic Corporation 39 Confidential - Do Not Copy VA1912w-2_VA1912wb-2
Service Manual
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Do Not Copy VA1912w-2_VA1912wb-2 Defect Mode C Failure Analysis Repair Testing ※ " Panel Change" Should be Performed to Level 3 Repair Horizontal Line Defect Vertical Weak Line Horizontal Weak Line Vertical Band Defect Horizontal Band Defect Power Saving Display Abnormal Check PCBA Check Panel Check PCBA Peculiar Smell Check PCBA AD/B Change Panel Change AD/B Change AD/B Change Power/B Change Inverter/B Change Next Step NG TEST Complete ViewSonic Corporation 40 Confidential -
Do Not Copy VA1912w-2_VA1912wb-2 Defect Mode C Failure Analysis Repair Testing ※ " Panel Change" Should be Performed to Level 3 Repair Horizontal Line Defect Vertical Weak Line Horizontal Weak Line Vertical Band Defect Horizontal Band Defect Power Saving Display Abnormal Check PCBA Check Panel Check PCBA Peculiar Smell Check PCBA AD/B Change Panel Change AD/B Change AD/B Change Power/B Change Inverter/B Change Next Step NG TEST Complete ViewSonic Corporation 40 Confidential -
Service Manual
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Do Not Copy VA1912w-2_VA1912wb-2 Defect Mode Power ON/OFF Abnormal Failure Analysis Repair Testing ※ " Panel Change" Should be Performed to Level 3 Repair AD/B Change Power/B Change No Power Turn Off Abnormal Check PCBA Check PCBA Check Wire Check Wire Check Adapter CNT/B Change Inverter/B OSD/B Change OSD ... Check PCBA Check Wire Next Step AD/B Change Power/B Change Inverter/B OSD/B Change OSD Cable DC Power CNT Cable Change Adapter Change NG TEST Completed ViewSonic Corporation 41 Confidential -
Do Not Copy VA1912w-2_VA1912wb-2 Defect Mode Power ON/OFF Abnormal Failure Analysis Repair Testing ※ " Panel Change" Should be Performed to Level 3 Repair AD/B Change Power/B Change No Power Turn Off Abnormal Check PCBA Check PCBA Check Wire Check Wire Check Adapter CNT/B Change Inverter/B OSD/B Change OSD ... Check PCBA Check Wire Next Step AD/B Change Power/B Change Inverter/B OSD/B Change OSD Cable DC Power CNT Cable Change Adapter Change NG TEST Completed ViewSonic Corporation 41 Confidential -
Service Manual
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Do Not Copy VA1912w-2_VA1912wb-2 Defect Mode Abnormal BIOS &OSD Failure Analysis Repair Testing ※ " Panel Change" Should be Performed to Level 3 Repair OSD Key Unavailable OSD Can't Input OSD Can't Read OSD No Display OSD Jiggle OSD Display Abnormal Check PCB Check Wire Check BIOS AD/B Change ... PCBA Check Wire Check Loudspeaker Next Step AD/B Change CNT/B Change Power/B Change Inverter/B Change OSD/B Change OSD Cable Change Loudspeaker Change NG TEST Completed ViewSonic Corporation 42 Confidential -
Do Not Copy VA1912w-2_VA1912wb-2 Defect Mode Abnormal BIOS &OSD Failure Analysis Repair Testing ※ " Panel Change" Should be Performed to Level 3 Repair OSD Key Unavailable OSD Can't Input OSD Can't Read OSD No Display OSD Jiggle OSD Display Abnormal Check PCB Check Wire Check BIOS AD/B Change ... PCBA Check Wire Check Loudspeaker Next Step AD/B Change CNT/B Change Power/B Change Inverter/B Change OSD/B Change OSD Cable Change Loudspeaker Change NG TEST Completed ViewSonic Corporation 42 Confidential -
Service Manual
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... ※ " Panel Change" Should be Performed to Level 3 Repair Other Abnormal Display Display Shut Down Display Flicker ((tapping ) Check PCBA Check Panel Check PCBA Check Panel AD/B Change Power/B Change CNT/B Change Panel Change ... EDID Code AD/B Change EDID Update Check PCBA Check Wire Check Controller TV /B Change AV Cable Change Remote controller Change NG Next Step TEST Complete ViewSonic Corporation 43 Confidential - Do Not Copy VA1912w-2_VA1912wb-2
... ※ " Panel Change" Should be Performed to Level 3 Repair Other Abnormal Display Display Shut Down Display Flicker ((tapping ) Check PCBA Check Panel Check PCBA Check Panel AD/B Change Power/B Change CNT/B Change Panel Change ... EDID Code AD/B Change EDID Update Check PCBA Check Wire Check Controller TV /B Change AV Cable Change Remote controller Change NG Next Step TEST Complete ViewSonic Corporation 43 Confidential - Do Not Copy VA1912w-2_VA1912wb-2
Service Manual
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...OSD. ViewSonic Corporation 44 Confidential - z No Signal Input Check the signal connection between the computer and LCD monitor. ...LCD monitor Take off extra accessories (such as below. z Uneven color Use OSD Color Menu to adjust H_Position and V_Position. Check image size setting. Perform Auto Adjust. z White color is not centered Use OSD Image Menu to adjust color setting. Do Not Copy VA1912w...repair. z "Out of power. z Image too dark Adjust brightness and contrast by OSD. z Size is ON. Check whether the LCD monitor...
...OSD. ViewSonic Corporation 44 Confidential - z No Signal Input Check the signal connection between the computer and LCD monitor. ...LCD monitor Take off extra accessories (such as below. z Uneven color Use OSD Color Menu to adjust H_Position and V_Position. Check image size setting. Perform Auto Adjust. z White color is not centered Use OSD Image Menu to adjust color setting. Do Not Copy VA1912w...repair. z "Out of power. z Image too dark Adjust brightness and contrast by OSD. z Size is ON. Check whether the LCD monitor...