Acer Aspire 1450 Service Guide

							Chapter 353
Disassembling the Main Unit
Remove the function key board and the keyboard
1.Take the wireless antenna out of the hook on the function key board.
2.Disconnect function key board connector
3.Unscrew the three screws holding the function key board.
4.Remove the three screws that secure the keyboard.
5.Turn over the unit and remove the two screws as the picture shows.
6.Turn over the keyboard. Disconnect the keyboard FFC then remove the keyboard.
Separate the main unit into the logic upper and the logic lower assembly
1.Remove the three screws on the rear panel.
2.Unscrew the 19 screws on the bottom panel.
3.Detach the front bezel from the main unit.
4.Remove the two screws. Then take the right and the left antenna off the main unit.
5.Disconnect the touchpad cable.
6.Pull out the right and the left wireless LAN antenna, then detach the logic upper assembly from the logic 
lower assembly. 
						

							54Chapter 3
Disassembling the logic upper assembly
1.Take out the touchpad cable from the small hook on touchpad holder.
2.Remove the four screws holding the touchpad shielding and the touchpad board.
3.Disconnect the touchpad FFC from the touchpad board.
4.Remove the touchpad board.
5.Remove the wireless and bluetooth button off the touchpad board.
6.Remove the four screws that fasten the touchpad holder.
7.Remove the touchpad off the logic upper assembly.
8.Disconnect touchpad FFC. 
						

							Chapter 355
Disassembling the logic lower assembly
1.In order to take out the main board from the upper case, first remove the four screws that fasten the top 
cover shielding.
2.Remove the three screws holding the 4-in-1 card reader, then remove it.
3.Unscrew the four screws that secure the thermal module.
4.Disconnect the fan connector then remove the thermal module.
5.Remove one screw that secures the main board as picture shows.
6.Remove another screw that fastens the main board.
7.Take out the bluetooth antenna.
8.Disconnect the speaker set cable.
9.To remove the main board from the lower case assembly, first press the PCMCIA card button.
10.Then take the main board off the lower case assembly.
11 .Unscrew the two screws that fasten the HDD bracket.
12.Remove one screw holding the top cover shielding. 
						

							56Chapter 3
13.Disconnect the microphone cable. Then remove the top cover shielding.
14.Turn the CPU lock counter clock-wise with a flat head screw driver. Then remove the CPU.
15.Pop out the memory then remove it.
16.Unscrew the two screws that secure the modem/bluetooth combo card. Remove the modem/bluetooth 
combo card then disconnect the connector.
17.Disconnect the bluetooth antenna and the modem cable.
18.Disconnect the smart card reader FPC.
19.Unscrew the two screws holding the smart card reader then remove it. 
						

							Chapter 357
Disassembling the LCD Module
1.Remove the six screw pad and the six screws.
2.Detach the LCD bezel carefully.
3.Disconnect LCD inverter.
4.Remove the two screws holding the LCD to LCD panel.
5.Then remove the LCD.
6.Remove the four screws that fasten the right and the left LCD brackets. Then remove the right and the left 
LCD brackets.
7.Tear off the electric conductive tape that fastens the LCD coaxial cable.
8.Tear off another electric conductive tape that fastens the LCD coaxial cable.
9.Disconnect the LCD coaxial cable.
.
10.Detach the wireless antenna from the LCD panel.
11 .Remove the two screws holding the LCD latch kit.
12.Remove the LCD latch kit bracket. 
						

							58Chapter 3
13.Unhook the spring.
14.Remove the screw that fastens the LCD latch kit.
15.Then remove the LCD latch kit. 
						

							Chapter 359
Disassembling the External Modules
Disassembling the HDD Module
1.Remove the four screws holding the HDD bracket; two on each side.
2.Take out the HDD from the HDD bracket.
Disassembling the O ptical D rive Module
1.Remove the two screws holding the ODD bracket.
2.Remove another screw as the picture shows.
3.Then remove the last two screws on the back side of the ODD module.
4.Slide the ODD from the ODD bracket.
5.Then remove the optical bracket.
6.In order to open the ODD, use an uncurved pin to press the emergency eject hole.
7.Remove the three screws that fasten the ODD door.
8.Then detach the ODD door. 
						

							60Chapter 3 
						

							Chapter 461
Use the following procedure as a guide for computer problems.
NOTE: The diagnostic tests are intended to test this model.  Non-Acer products, prototype cards, or modified 
options can give false errors and invalid system responses.
1.Duplicate symptom and obtain the failing symptoms in as much detail as possible.
2.Distinguish symptom. Verify the symptoms by attempting to re-create the failure by running the diagnostic 
test or by repeating the same operation.
3.Disassemble and assemble the unit without any power sources.
4.If any problem occurs, you can perform visual inspection before you fellow this chapter’s instructions. You 
can check the following:
power cords are properly connected and secured;
there are no obvious shorts or opens;
there are no obviously burned or heated components;
all components appear normal.
5.Use the following table with the verified symptom to determine which page to go to.
Symptoms (Verified)Go To
Power failure. (The power indicator does not go 
on or stay on.)“Power System Check” on page 63.
POST does not complete. No beep or error 
codes are indicated.“Power-On Self-Test (POST) Error Message” on 
page 65
“Undetermined Problems” on page 77
POST detects an error and displayed messages 
on screen.“Error Message List” on page 66
Other symptoms (i.e. LCD display problems or 
others).“Power-On Self-Test (POST) Error Message” on 
page 65
Symptoms cannot be re-created (intermittent 
problems).Use the customer-reported symptoms and go to 
“Power-On Self-Test (POST) Error Message” on 
page 65
“Intermittent Problems” on page 76
“Undetermined Problems” on page 77
Troubleshooting
Chapter 4 
						

							62Chapter 4
System Check Procedures
External Diskette D rive Check
Do the following to isolate the problem to a controller, driver, or diskette. A write-enabled, diagnostic diskette is 
required.
NOTE: Make sure that the diskette does not have more than one label attached to it. Multiple labels can cause 
damage to the drive or cause the drive to fail. 
Do the following to select the test device. See “System Diagnostic Diskette” on page 44 for details.
1.Boot from the diagnostics diskette and start the diagnostics program (see “System Diagnostic Diskette” on 
page 44).
2.See if FDD Test is passed as the program runs to FDD Test.
3.Follow the instructions in the message window.
If an error occurs with the internal diskette drive, reconnect the diskette connector on the system board.
If the error still remains:
1.Reconnect the external diskette drive/DVD-ROM module.
2.Replace the external diskette drive/CD-ROM module.
3.Replace the main board.
External CD -ROM D rive Check
Do the following to isolate the problem to a controller, drive, or CD-ROM. Make sure that the CD-ROM does 
not have any label attached to it. The label can cause damage to the drive or can cause the drive to fail.
Do the following to select the test device:
1.Boot from the diagnostics diskette and start the diagnostics program (refer to “System Diagnostic 
Diskette” on page 44.
2.See if CD-ROM Test is passed when the program runs to CD-ROM Test.
3.Follow the instructions in the message window.
If an error occurs, reconnect the connector on the System board. If the error still remains:
1.Reconnect the external diskette drive/CD-ROM module.
2.Replace the external diskette drive/CD-ROM module.
3.Replace the main board.
Keyboard or Auxiliary Input D evice Check
Remove the external keyboard if the internal keyboard is to be tested.
If the internal keyboard does not work or an unexpected character appears, make sure that the flexible cable 
extending from the keyboard is correctly seated in the connector on the system board.
If the keyboard cable connection is correct, run the Keyboard Test. See “System Diagnostic Diskette” on page 
44 for details.
If the tests detect a keyboard problem, do the following one at a time to correct the problem. Do not replace a 
non-defective FRU:
1.Reconnect the keyboard cables.
2.Replace the keyboard.
3.Replace the main board.
The following auxiliary input devices are supported by this computer: