Diagnostic Aids 81Power-On Self TestEach time you power-on the system, the power-onself test (POST) is initiated. Several items are testedduring POST, but are for the most part transparent tothe user.POST checks the following:To start POST, turn on the monitor and then thesystem unit. The following will happen:1. The IBM Personal Computer logo will appear onthe screen.2. At this time one of two hot-keys may be used. TheF1 key will cause the system Configuration/SetupUtility menu to appear. The Esc key will switch thegraphical IBM logo screen to the traditional text-based system startup screen, which displaysinformation of BIOS version, CPU, Hard DisketteDrive(s), CD-ROM, Mouse and system memory.3. If an error is detected during POST, the IBM logoscreen will automatically switch to the text-basedscreen and display the error message or code witha beep. Depending on the criticalness of the POSTerror, the system may halt and/or display themessage “Press to enter to the Setup or to continue...”4. During the POST, press <F12>, a Boot Menu willappear. You can decide Boot options here or insystem Configuration/Setup Utility menu, Startupsub-menu.If this message appears, pressing the Esc key willallow the system to attempt to proceed despite thereported error; pressing F1 will cause the systemConfiguration/Setup Utility menu to appear.• CPU • Memory Size• Cache Memory • Memory Speed• Hard Diskette Drive(s) • CD-ROM• Mouse • BIOS Version
