IBM MICRO TOWER 2169 Hardware Maintenance Manual

Contents

106IntroductionThis section explains the diagnostic aids, power-on self test(POST) and diagnostics program (PC-Doctor), that areavailable for troubleshooting problems on the system.Power-On Self TestEach time you power-on the system, the power-on self test(POST) is initiated. Several items are tested during POST, butis for the most part transparent to the user.POST checks the following:• System Board • Mouse• Memory • Parallel Port(s)• SVGA Controller • Serial Port(s)• Hard Disk Drive(s) • CD-ROM Drive(s)• Floppy Diskette Drive(s) • Sound Controller• KeyboardTo start POST, turn on the monitor and then the system unit.The following will happen:1. The IBM logo will appear on center of the screen.2. At this time one of two hot-keys may be used. The DELkey, as described on screen, will cause the system SetupUtility menu to appear. The TAB key will switch thegraphical IBM logo screen to the traditional text-basedsystem startup screen, which displays BIOS version andsystem memory tested.3. If an error is detected during POST, the IBM logo screenwill automatically switch to the text-based screen anddisplay the error message or code with a beep. Dependingon the criticality of the POST error, the system may haltand/or display the message “Press DEL to go to the Setupor Enter to continue”.If this message appears, pressing the Enter key will allowthe system to attempt to proceed despite the reported error;pressing F1 will cause the system Setup Utility menu toappear.Copyright IBM Corp. 2000