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Solving Problems 81
More Problem Solving Procedures
This section provides a more detailed approach to identifying a problem and locating its source.
Preparing the System for Diagnostic Testing
CAUTION
Turn off devices before disconnecting cables: Before disconnecting any
peripheral cables from the system, turn off the system and any external
peripheral devices. Failure to do so can cause permanent damage to the
system and/or the peripheral devices.
1. Turn off the system and all external peripheral devices. Disconnect all of them from the
system, except the keyboard and video monitor.
2. Make sure the system power cord is plugged into a properly grounded AC outlet.
3. Make sure your video display monitor and keyboard are correctly connected to the system.
Turn on the video monitor. Set its brightness and contrast controls to at least two thirds of their
maximum ranges (see the documentation supplied with your video display monitor).
4. If the operating system normally loads from the hard disk drive, make sure there is no diskette
in drive A. Otherwise, place a diskette containing the operating system files in drive A.
5. Turn on the system. If the power LED does not light, see “Power Light Does Not Light” on
page 82.
Monitoring POST
The server may start to beep while booting. These beeps identify system events. The following
gives a description of possible beep codes.
Table 6. Beep Codes
Beep Code Description
1 One short beep before boot (this is normal, not an error)
1-2 Search for option ROMs. One long, two short beeps on checksum failure
1-2-2-3 BIOS ROM checksum
1-3-1-1 Test DRAM refresh
1-3-1-3 Test 8742 Keyboard Controller
1-3-3-1 Auto size DRAM, system BIOS stops execution here if the BIOS does not detect any usable
memory DIMMs
1-3-4-1 Base RAM failure; BIOS stops execution here if entire memory is bad
2-1-2-3 Check ROM copyright notice
2-2-3-1 Test for unexpected interrupts
For additional information regarding monitoring POST, see Chapter 4.