Acer Travelmate 550 Service Guide

Chapter 363
Disassembling the External Modules
Disassembling the HDD Module
1.Remove the four screws on HDD carrier.
2.Remove the hard disk drive from the carrier.
3.Disconnect the hard disk connector.
Disassembling the Floppy Disk Drive Module
1.Disconnect the floppy disk drive FFC.
2.Unscrew the two screw holding the bracket.
3.Unscrew the screw holding the bracket.
4.Remove the right and the left brakets.
5.Press the FDD latch with the fixture and remove the FDD panel.
.
Disassembling the DVD-ROM...

64Chapter 3 

Chapter 465
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.Obtain the failing symptoms in as much detail as possible.
2.Verify the symptoms by attempting to re-create the failure by running the diagnostic test or by repeating 
the same operation.
3.If any problem occurs, you can perform visual inspection before you...

66Chapter 4
System Check Procedures
External Diskette Drive 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 45 for details.
1.Boot from the diagnostics diskette and start the...

Chapter 467
Keyboard or Auxiliary Input Device 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 
45 for details.
If the tests detect a keyboard problem, do the following one at...

68Chapter 4
Check the Battery Pack
To check the battery pack, do the following:
From Software:
1.Check out the Power Management in control Panel
2.In Power Meter, confirm that if the parameters shown in the screen for Current Power Source and Total 
Battery Power Remaining are correct.
3.Repeat the steps 1 and 2, for both battery and adapter.
4.This helps you identify first the problem is on recharging or discharging.
From Hardware:
1.Power off the computer. 
2.Remove the battery pack and measure the...

Chapter 469
Power-On Self-Test (POST) Error Message
The POST error message index lists the error message and their possible causes. The most likely cause is 
listed first.
NOTE: Perform the FRU replacement or actions in the sequence shown in FRU/Action column, if the FRU 
replacement does not solve the problem, put the original part back in the computer. Do not replace a 
non-defective FRU.
This index can also help you determine the next possible FRU to be replaced when servicing a computer.
If the...

70Chapter 4
Index of Error Messages
Error Code List
Error CodesError Messages
006 Equipment Configuration Error
010 Equipment Configuration Error
070 Real Time Clock Error 1
071 CMOS Battery Bad 4
072 CMOS Checksum Error 1
080 Battery Is Critical Low 1
110 Incorrect password specified, system halted 1
Error Message List
Error MessagesFRU/Action in Sequence
0200 Failure Fixed Disk Hard disk error detected.
Check to see if fixed disk is attached properly.
Enter the BIOS Setup Utility and verify the hard...

Chapter 471
0281 Memory size found by POST differed from 
CMOSRun “Load Setup Defaults” in BIOS Setup Utility.
System board
02B0 Diskette drive A/B error Drive A: or B: is present but fails the BIOS POST diskette tests.
Check the drive is defined with the proper diskette type in BIOS 
Setup Utility
Check if the diskette drive is attached correctly.
See “External Diskette Drive Check” on page 66. 
02B2 Incorrect Drive A type - run SETUP Type of floppy drive A: not correctly identified in Setup.
System...

72Chapter 4
Error Message List
No beep Error MessagesFRU/Action in Sequence
No beep, power-on indicator turns off and LCD is 
blank.Power source (battery pack and power adapter). See “Power 
System Check” on page 67. 
Ensure every connector is connected tightly and correctly. 
Reconnect the DIMM.
LED board.
System board.
No beep, power-on indicator turns on and LCD is 
blank.Power source (battery pack and power adapter). See “Power 
System Check” on page 67. 
Reconnect the LCD connector
Hard disk drive...