Improper Lcd Display - Toshiba E-STUDIO190F Service Manual

4.2.

Improper LCD Display

START
Check connectors on the SC PCB
and PNL PCB.
Is LED/LCD displayed?
No
Does CNP501, pin 5 on the SC
PCB measure +5 VDC?
No
Replace the SC PCB.
Is the trouble
resolved?
Yes
END
• LCD Contrast Adjustment
1. Press "FUNCTION", "7", "8" and "SET" keys to enter "8: Maintenance Mode".
2. Press "V" or "/\" arrow keys to select "6: LCD Brightness?" and press "SET" key.
3. Press "<" cursor key for Lighter or ">" key for Darker.
4. Press "SET" or "STOP".
Yes
Yes
No
Replace the Low
Voltage Power
Supply Unit.
Does the display appear normal?
Yes No
Replace the LCD
Module.
Is the trouble resolved?
Yes
END
82
No
Replace the
Panel.