Acer Aspire 7540 Service Guide

Chapter 383
15.Detach all adhesive tapes and any cable that is glued to the LCD panel.    
16.Detach the FPC cable from its connector on the back of the LCD panel. 
17.Disconnect the FPC cable from the LCD panel.  

84Chapter 3
Removing the Antennas 
1.See “Removing the SD Dummy Card” on page 44.
2.See “Removing the Battery Pack” on page 45.
3.See “Removing the Back Cover” on page 46.
4.See “Removing the Hard Disk Drive Module” on page 48.
5.See “Removing the Wireless LAN Card” on page 50.
6.See “Removing the DIMM Module” on page 51.
7.See “Removing the Heatsink Module” on page 52.
8.See “Removing the CPU” on page 54.
9.See “Removing the Optical Drive Module” on page 55.
10.See “Removing the Middle Cover” on page...

Chapter 485
Use the following procedure as a guide for computer problems.
NOTE: The diagnostic tests are intended to test only Acer products. 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.Use the following table with the verified symptom to determine...

86Chapter 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.
1.Boot from the diagnostics diskette and start the diagnostics program.
2.See if FDD Test is passed as the...

Chapter 487
If any of these devices do not work, reconnect the cable connector and repeat the failing operation. 
Memory Check
Memory errors might stop system operations, show error messages on the screen, or hang the system.
1.Boot from the diagnostics diskette and start the diagnostic program (please refer to main board.
2.Go to the diagnostic memory in the test items.
3.Press F2 in the test items.
4.Follow the instructions in the message window.
NOTE: Make sure that the DIMM is fully installed into...

88Chapter 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 489
Index of Error Messages
Error Code List
Error CodesError Messages
006 Equipment Configuration Error
Causes:
1. CPU BIOS Update Code Mismatch
2. IDE Primary Channel Master Drive Error
(THe causes will be shown before “Equipment 
Configuration Error”)
010 Memory Error at xxxx:xxxx:xxxxh (R:xxxxh, W:xxxxh) 
070 Real Time Clock Error
071 CMOS Battery Bad
072 CMOS Checksum Error
110 System disabled.
Incorrect password is specified.
 Battery critical LOW
In this situation BIOS will issue 4 short...

90Chapter 4
Error Message List
Error MessagesFRU/Action in Sequence
Failure Fixed Disk Reconnect hard disk drive connector.
“Load Default Settings” in BIOS Setup Utility.
Hard disk drive
System board
Stuck Key see “Keyboard or Auxiliary Input Device Check” on page 86. 
Keyboard error see “Keyboard or Auxiliary Input Device Check” on page 86. 
Keyboard Controller Failed see “Keyboard or Auxiliary Input Device Check” on page 86. 
Keyboard locked - Unlock key switch Unlock external keyboard
Monitor type...

Chapter 491
Fail-Safe Timer NMI Failed DIMM
System board
Device Address Conflict Run “Load Default Settings” in BIOS Setup Utility.
RTC battery
System board
Allocation Error for device Run “Load Default Settings” in BIOS Setup Utility.
RTC battery
System board
Failing Bits: nnnn DIMM
BIOS ROM
System board
Fixed Disk n None
Invalid System Configuration Data BIOS ROM
System board
I/O device IRQ conflict Run “Load Default Settings” in BIOS Setup Utility.
RTC battery
System board
Operating system not found...

92Chapter 4
No beep, power-on indicator turns on and a 
blinking cursor shown on LCD during 
POST.Ensure every connector is connected tightly and correctly.
System board
No beep during POST but system runs 
correctly.Speaker
System board Error Message List
No beep Error MessagesFRU/Action in Sequence