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Miscellaneous Trouble-Shooting
 
8.1 General Failure and Power-On-Self-Test (POST) 
PC Partner motherboards are incorporating industry standard BIOS (Basic Input Output System) including Phoenix/Award or AMI on various models respectively. These BIOS feature POST (Power-On-Self-Test) codes send to the logical IO port 80 (hex) during power up time. Capturing these POST codes helps to perform trouble shooting in case the system do not function as expected.  

Diagnostic card for capturing and displaying these POST codes are available at various sources, including your local computer store. Each BIOS supplier (Phoenix /Award, AMI) has its own set of POST code defination.  

The diagnostic procedures listed below provides a general idea of the trouble-shooting that can be performed by a normal user, to identify which module to be the cause of problem. It is recommended that component level repairing of boards should only be made via experienced technician, while electrical safety rules must be observed. 
 

 
8.2 No display, no beep sound, no post code change 
This condition implies that possibly the CPU is not able to run any instruction. Please check for a bad CPU, improper inserting of CPU at the socket, wrong setting around the CPU type / voltage jumpers, or even the DC power cables from the power supply to the motherboard.  
 
 
8.3 No display, with beep sound, post code changes 
This tells that the CPU is at least doing some primitive jobs like checked for memory, checked for diaplay card, checked for other low level hardware, and beeps the speaker. Please check for properly inserted display card, display signal cable, memory modules...etc.

Refer to the following list of speaker beeps sound (Phoenix/Award BIOS), with the possible error source :

  • Long beep sound repeatedly -> RAM detection error
  • One long beep following by two short beeps -> Display Adaptor Error  
     
 
8.4 With display, error message on POST screen 
The following are common error messages on the POST screen, with respective possible causes :

CMOS CHECKSUM ERROR -

On board CMOS backup battery might be used up, try replace the battery. Or there might be an accidental "clear CMOS" during hardware installation. Try restarting the system, press <Del> key to enter CMOS Setup, load the CMOS "Optimized Default", Save and Exit.

DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER -

No bootable device is found. This could mean that either a boot drive was not detected, or the drive did not contain proper system boot files. Check if there was any floppy diskette present in the Drive A:, remove it and press <Enter>. Check that the attached HDD is formated as a bootable device.

KEYBOARD ERROR OR NO KEYBOARD PRESENT -

Cannot initialize the keyboard. Make sure the keyboard is attached correctly and no keys are being pressed during the boot. If you are purposely configuring the system without a keyboard, set the error halt condition in Setup to HALT ON ALL, BUT KEYBOARD. This will cause the BIOS to ignore the missing keyboard and continue the boot.  

 
8.5 Display screen quality problems 
Check for properly installed Display Driver Software, and possible conflict with some other installed application software. If you had installed extra memory to your display card, make sure these display memory are compatible with the display card requirements.  

Also check if your display monitor is capable of the resolution and frequency requirement of your display mode. 
 

 
8.6 IDE Hard Disk related problems 
If your hard disk is running fine on the PC in the past, but failed suddenly for unknown reasons, please check for mechanical damages to the hard disk due to mechanical shock. The data may also be corrupted due to damages at certain sectors. Also watch out for computer virus that may infect th hard disk. This may call for re-format of the hard disk in order to recover.  

If your hard disk is a brand new one, first time installation into your PC, please check for the proper power / signal connection to the drive. Then make sure the proper jumpers for Master/Slave connection is set. If all these hardware factors are correct, then check for proper software setting from the BIOS CMOS Setup. Normally the "Auto" type hard disk setting will be able to take care of most brands of HDD.  

Under very rare conditions, the motherboard BIOS version may be respobnsible for hard disk compatibility. Try upgrading to newer BIOS, by following the description on Flash BIOS upgrade. The last resort is to suspect on the hard drive as malfunctioning. 
 

 
8.7 IDE CD-ROM related problems 
IDE CD-ROM drives are attached to motherboard at one of the IDE connectors. The preferable connection of IDE type CD-ROM drive is to have a separate 40-ways flat cable for the CD-ROM drive, rather than sharing a flat cable with the IDE HDD.   

IDE CD-ROM drives should be detected at power up screen, if BIOS CMOS setting is made as such. Normal DOS / Win 3.1X environment operation requires real-mode software driver to be loaded, but Windows 95/98/ME/2K/XP will try to detect the presence of IDE CD-ROM drives and operate in the 32-bit protected mode. Please check for the proper software be installed and the hardware is reocgnized by the software.  
 

 
8.8 I/O functions related problems 
Common IO functions are implemented onto PC Partner motherboards, including floppy interface, serial ports, parallel port, keyboard, PS/2 mouse port, USB ports, Sound. These ports are implemented via the Super IO chip, Sound Controller chip plus the core logic chipset.  

Problems in these area are most likely related to the system resource conflicts in IRQ, DMA, IO address, and can be resolved by re-configuring from the CMOS Setup. Please check for the usage of system resource by other add-on devices in the system.  

Cable connection and orientation are also common sources of problems. 
 

 
8.9 Add-on cards related problems 
Add-on cards related problems are more complicated, because they can be related to hardware design issues of the add-on card, software conflicts of the add-on cards the existing operating system, or the system resource conflicts (IRQ/DMA/IO Address).  

The general practice is to clear up system resource conflicts first, then try installing software driver step by step, to locate where the conflict is, and try alternatives software options.  

Ultimately, if the problem comes from hardware design issues of the card manufacturer, please contact the card supplier , and look for possible software patch from the supplier's web site.