Acer Aspire Asx1200 Service Guide

Chapter 353
Removing the Front I/O and Card Reader Boards 
1.See “Removing the Side Panel” on page 34.
2.See “Removing the Font Bezel” on page 35.
3.See “Removing the Heat Sink Fan Assembly” on page 36.
4.See “Removing the Processor” on page 38.
5.See “Removing the Optical Drive” on page 40.
6.See “Removing the Hard Disk Drive” on page 42.
7.See “Removing the Memory Modules” on page 49.
8.Disconnect one end of the three USB (1, 2, and 4), audio (2), and 1394 (5) cables from the rear of the I/O 
and card...

54Chapter 3
9.Disconnect the other end of the cables from the mainboard. 
10.Remove the front I/O and card reader board bracket. 
a.Remove the two screws (B) that secures the bracket to the chassis. 
Screw (Quantity)ColorTo r q u ePart No.
#6-32*3/16 NI (2) Silver 5.5 to 6.5 kgf-cm 86.5A5B6.012 

Chapter 355
b.Push the bracket inward, then remove the bracket from the chassis. 
11 .Remove the card reader board.
a.Remove the two screws (A) that secure the card reader board to the bracket. 
Screw (Quantity)ColorTo r q u ePart No.
#6-32 L5 BZN (2) Black 5.5 to 6.5 kgf-cm 86.00J07.B60 

56Chapter 3
b.Pull the card reader board out of the bracket. 
12.Remove the front I/O board.
a.Remove the two screws (A) that secure the I/O board to the bracket. 
b.Pull the I/O board out of the bracket. 
Screw (Quantity)ColorTo r q u ePart No.
#6-32 L5 BZN (2) Black 5.5 to 6.5 kgf-cm 86.00J07.B60 

Chapter 357
Removing the Mainboard
1.See “Removing the Side Panel” on page 34.
2.See “Removing the Font Bezel” on page 35.
3.See “Removing the Heat Sink Fan Assembly” on page 36.
4.See “Removing the Processor” on page 38.
5.See “Removing the Optical Drive” on page 40.
6.See “Removing the Hard Disk Drive” on page 42.
7.See “Removing the Memory Modules” on page 49.
8.See “Removing the PCI Card” on page 51.
9.See “Removing the Front I/O and Card Reader Boards” on page 53.
10.Disconnect the LED cable from...

58Chapter 3
12.Remove the six screws (A) that secures the mainboard to the chassis, in the order shown.  
13.Lift the board from the chassis. 
Screw (Quantity)ColorTo r q u ePart No. 
#6-32 L5 BZN (6) Black 5.5 to 6.5 kgf-cm 86.00J07.B60 

Chapter 459
This chapter provides instructions on how to troubleshoot system hardware problems.  
Hardware Diagnostic Procedure
IMPORTANT:The diagnostic tests described in this chapter are only intended to test 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 recreate the failure by running the diagnostic tests or repeating the...

60Chapter 4
System Check Procedures
Power System Check
If the system will power on, skip this section. Refer to System External Inspection.
If the system will not power on, do the following:
TCheck if the power cable is properly connected to the system and AC source. 
TCheck if the voltage selector switch is set to the correct voltage setting.
System External Inspection
1.Inspect the LED indicators on the front panel, which can indicate the malfunction.   For the LED locations 
and description of their...

Chapter 461
POST Error and Beep Codes
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.
The error messages in the following table indicate the BIOS signals on the screen and the error symptoms 
classified by functions. If the symptom is not included on the list, please refer to “Undetermined Problems”. 
NOTE: Most of the error messages...

62Chapter 4
12h Use walking 1’s algorithm to check out interface in CMOS circuitry. Also set real-
time clock power status, and then check for override.  
13h Reserved
14h Program chipset default values into chipset. Chipset default values are 
MODBINable by OEM customers.
15h Reserved
16h Initial onboard clock generator if Early_Init_Onboard_Generator is defined. See 
also POST 26h.
17h Reserved
18h Detect CPU information including brand, SMI type (Cyrix or Intel) and CPU level 
(586 or 686).
19h...