NewLine VN Series Service Manual page 27

VN Service Manual
Problem #1: Can't turn on machine (Power indicator always stay on red)
Step 1: Replace the mainboard firstly.
Step 2: Replace the powerboard.
Problem #2: Dim screen (After turn on, the display get image but is very faint hard to see)
Step 1: If backlight is ON, replace the optical bonding module.
Step 2: If backlight is OFF, replace the backlight module.
Problem #3: Android can't pick up the OPS signal
Step 1: Check if the OPS is powered on, if not, press POWER button on the OPS front panel
to check if the OPS can be powered on or not.
Step 2: Check if the OPS can work with another known-working touchscreen, if not work,
replace the OPS.
Step 3: If there is no others touchscreen, connect the OPS pc via external HDMI cable to
touchscreen's rear HDMI IN port, if yes, check the OPS windows has installed the graphic card
driver properly or not, if not, install the graphic card driver.
Step 4: Replace the mainboard.
Step 5: Replace the OPS dock board.
Problem #4: No power (Power indicator is blank even no red colour)
Step 1: Replace the Powerboard
Step 2: Replace the AC relay control board.
Step 3: Replace the Mainboard.
Problem #5: Partial touch or dead touch area
Step 1: Refer to Part F to test the FlatFrog touch panel signal.
Step 2: According to testing result to replace some one sensor pcba or whole set sensor pcbas.
Problem #6: No touch
Step 1: Check if only Windows has no touch or both Windows and Android all have no touch.
Step 2: If only Windows has no touch, replace mainboard and OPS docking board one by one.
Step 3: If both Windows and Android all have no touch, please refer to Part F to test the FlatFrog
touch panel signal, according to testing result to do next replacement, basically need replace
the TP control board at first, if not working, send back testing result for analysis.
Problem #7: Ghost touch or the calibration is inaccurate
Step 1: Refer to Part F to test the FlatFrog touch panel signal.
Step 2: According to testing result to replace some one sensor pcba or whole set sensor pcbas.
Problem #8: No image (Black screen) even no faint display
Step 1: Pull off the power cord for 30s then pull on the power cord to check again, if it become
to start with image normally, please replace the Powerboard.
Step 2: If still no image, replace Mainboard, T-CON board, FFC cable of T-CON board, LVDS
cable and Powerboard one by one.
Step 3: Replace the backlight module.
Step 4: Replace the optical bonding module.
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