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Facilità d'uso
1. Remove the display assembly bezel. 2. Lift the display assembly latch off of the display-assembly top cover (see Figure 10). 3. Slide the latch spring off of the post on the display-assembly top cover (see Figure 10). You may need to use a small flat-blade screwdriver to separate the latch spring from the post. Dell Latitude L400 Service Manual To replace the display-assembly latch, perform the following steps: 1. Carefully place the latch spring over the post on the display-assembly top cover. You may need to use a small flat-blade screwdriver to place the spring over the post. Hold the spring on the post with the screwdriver while performing the next step. 2. Holding the latch, stretch the spring slightly and set the display-assembly latch in place in the display assembly top cover. 3. Reinstall the bezel. LCD Panel LCD panel wide flex cable LCD flex cable back light plug M2 x 3.5-mm screws (4) back light plug inverter inverter narrow flex cable ZIF connector M2 x 3.5-mm screw EMI sponges (2) narrow flex cable EMI shield Figure 11. LCD Panel Removal NOTICE: To avoid damaging the system board, you must remove the main battery before you service the computer. 1. Ground yourself by touching the unpainted metal surface of the I/O panel on the back of the computer. suppport.dell.com Dell Latitude L400 Service Manual 2. Remove the keyboard bezel. 3. Remove the display assembly. 4. Remove the display assembly bezel. 5. Remove the four M2 x 3.5-mm screws on the left and right sides of the display assembly that secure the LCD panel to the top cover (see Figure 11). 6. Remove the M2 x 3.5-mm screw that secures the inverter to the top cover. 7. Lift and roll the inverter over (toward you), so the bezel side is down and the connector side is up (see Figure 11). 8. Disconnect the narrow flex cable from the ZIF connector on the left side of the inverter. 9. Disconnect the two-wire back-light plug from the connector on the right side of the inverter (see Figure 11). 10. Remove the inverter. 11. Lift the LCD panel from the bottom edge, giving enough room to fit your hand between the LCD panel and the top cover. 12. Carefully peel the LCD flex cable away from the top cover. 13. Lift the LCD panel out of the top cover. 14. Lift up on the tape that is covering the wide flex-cable connector on the back of the LCD panel. NOTE: Keep the tape for when you replace the LCD panel. 15. Disconnect the wide flex cable from the connector on the back of the LCD panel. To replace the LCD panel, perform the following steps: 1. Connect the LCD flex cable to the connector on the back of the LCD panel. 2. Reinstall the tape that covers the LCD flex-cable connector on the back of the LCD panel. 3. If you are installing a new LCD flex cable, peel off the backing tapes that are on the LCD flex-cable EMI sponges. 4. Reinstall the LCD panel in the top cover. a. Holding the LCD flex cable against the back of the LCD panel, insert the right edge of the LCD panel into the right end of the top cover. The right edge of the LCD panel should press against the EMI sponge on the right side of the top cover. The LCD panel should not rest on top of the EMI sponge. Dell Latitude L400 Service Manual b. Lower the bottom end of the LCD panel into the top cover, making sure the LCD flex cable lines up with the opening that is to the right of the left hinge. c. Make sure the narrow part of the flex cable that goes to the inverter is visible at the bottom edge of the LCD panel. d. Press the LCD panel into the top cover. 5. Connect the narrow flex cable to the ZIF connector on the left side of the inverter. 6. With the connector side of the inverter facing up, connect the two-wire back-light plug to the connector on the right end of the inverter. When the plug is all the way in the connector, the key slot in the center of the plug should not be visible. If you can see the key slot, the plug is not in the connector correctly. Pull the plug out, turn the plug over, and reinsert it into the connector. 7. Roll the inverter over (away from you), so the connector side of the inverter is up. 8. Place the inverter into the top cover, aligning the posts in the top cover with the alignment holes in the inverter. 9. Holding the inverter in place, reinstall the M2 x 3.5-mm screw that secures the inverter to the top cover. 10. Reinstall the four M2 x 3.5-mm screws, in the left and right ends of the top cover, that secure the LCD panel to the top cover. 11. Reinstall the display assembly latch. 12. Reinstall the display assembly bezel. Display Assembly Hinges 1. Remove the keyboard bezel. 2. Remove the display assembly. 3. Remove the display bezel. 4. Remove the two M2.6 x 4-mm screws that secure the left hinge to the top cover (see Figure 9). 5. Remove the two M2.6 x 4-mm screws that secure the right hinge to the top cover. When replacing the left and right hinges, make sure they are installed correctly. An L is stamped on the left hinge and an R is stamped on the right hin...