Acer Aspire 5942g Service Guide

Chapter 4139
HDD Not Operating Correctly
If the HDD does not operate correctly, perform the following actions one at a time to correct the problem. 
1.Disconnect all external devices.
2.Run a complete virus scan using up-to-date software to ensure the computer is virus free. 
3.Run the Windows 7 Startup Repair Utility:
a.insert the Windows 7 Operating System DVD in the ODD and restart the computer. 
b.When prompted, press any key to start to the operating system DVD. 
c.The Install Windows screen...

140Chapter 4
ODD Failure
If the ODD fails, perform the following actions one at a time to correct the problem. Do not replace a non-
defective FRUs:
ODD Not Operating Correctly
If the ODD exhibits any of the following symptoms it may be faulty:
• Audio CDs do not play when loaded 
• DVDs do not play when loaded 
• Blank discs do not burn correctly 
• DVD or CD play breaks up or jumps 
• Optical drive not found or not active: 
• Not shown in My Computer or the BIOS setup 
• LED does not flash when the...

Chapter 4141
a.Double-click lDE ATA/ATAPI controllers. If a device displays a down arrow, right-click on the device 
and click Enable.
b.Double-click DVD/CD-ROM drives. If the device displays a down arrow, right-click on the device and 
click Enable.
c.Check that there are no yellow exclamation marks against the items in l D E  ATA / ATA P I  c o n t r o l l e r s. If 
a device has an exclamation mark, right-click on the device and uninstall and reinstall the driver.
d.Check that there are no yellow...

142Chapter 4
b.Double-click IDE ATA/ATAPI controllers, then right-click ATA Device 0. 
c.Click Properties and select the Advanced Settings tab. Ensure that the Enable DMA box is 
checked and click OK. 
d.Repeat for the other ATA Devices shown if applicable.
Drive Not Detected
If Windows cannot detect the drive, perform the following actions one at a time to correct the problem.
1.Restart the computer and press F2 to enter the BIOS Utility. 
2.Check that the drive is detected in the ATAPI Model Name field...

Chapter 4143
Modem Function Failure
If the internal Modem fails, perform the following actions one at a time to correct the problem. Do not replace a 
non-defective FRUs:
Wireless Function Failure
If the WLAN fails, perform the following actions one at a time to correct the problem. Do not replace a non-
defective FRUs:
START
RJ-11 well
connected?
Modem  wire
well connected?
Modem card
well connected?
Modem card  OK?
Replace
Mainboard
Connect it well
Seat it well
Replace
Modem card
Connect it well
No
No...

144Chapter 4
Thermal Unit Failure
If the Thermal Unit fails, perform the following actions one at a time to correct the problem. Do not replace a 
non-defective FRUs:
External Mouse Failure
If an external Mouse fails, perform the following actions one at a time to correct the problem. 
1.Try an alternative mouse.
2.If the mouse uses a wireless connection, insert new batteries and confirm there is a good connection. See 
the mouse user manual.
3.If the mouse uses a USB connection, try an alternate USB...

Chapter 4145
• No hardware is listed under Other Devices.
13.If the Issue is still not resolved, see “Online Support Information” on page 231.
Other Failures
If the CRT Switch, Dock, LAN Port, external MIC or Speakers, PCI Express Card, 5-in-1 Card Reader or 
Volume Wheel fail, perform the following general steps to correct the problem. Do not replace a non-defective 
FRUs:
1.Check Drive whether is OK.
2.Check Test Fixture is ok.
3.Swap M/B to Try. 

146Chapter 4
Intermittent Problems
Intermittent system hang problems can be caused by a variety of reasons that have nothing to do with a 
hardware defect, such as: cosmic radiation, electrostatic discharge, or software errors. FRU replacement 
should be considered only when a recurring problem exists.
When analyzing an intermittent problem, do the following:
1.Run the advanced diagnostic test for the system board in loop mode at least 10 times.
2.If no error is detected, do not replace any FRU.
3.If any...

Chapter 4147
Post Codes
These tables describe the POST codes and descriptions during the POST.
Post Code Range
SEC Phase POST Code Table
NOTE: The color bar items indicate 3rd party related functions that are platform dependent.
PhasePOST Code Range
SEC 0x01 - 0x0F
PEI 0x70 - 0x9F
DXE 0x40 - 0x6F
BDS 0x10 - 0x3F
SMM 0xA0 - 0xBF
S3 0xC0 - 0xCF
ASL 0x51 - 0x55
0xE1 - 0xE4
PostBDS 0xF9 - 0xFE
InsydeH2ODDT™
Reserve0xD0 - 0xD7
OEM Reserve 0xE8 - 0xEB
Reserved 0xD8 - 0xE0
0xE5 - 0xE7
0xEC - 0xF8
Functionality...

148Chapter 4
PEI Phase POST Code Table:
NOTE: The color bar items indicate 3rd party related functions that are platform dependent.
Functionality Name (Include 
PostCode.h)PhasePost 
CodeDescription
PEI_SIO_INIT PEI 70 Super I/O Initialization
PEI_CPU_REG_INIT PEI 71 CPU Early Initialization
PEI_CPU_AP_INITPEI72Multi-processor Early Initial
PEI_CPU_HT_RESETPEI73HyperTransport Initialization
PEI_PCIE_MMIO_INIT PEI 74 PCIE MMIO BAR Initialization
PEI_NB_REG_INIT PEI 75 North Bridge Early Initialization...