NCR 7458 - Manual (Page 23)

Chapter 2: POST Diagnostics 2-5
Beeps Error Message Corrective Action
4-4-3-1 02F8: CPU over temperature
error
Check/replace Fan,
Check air vents, etc
4-4-3-2 02FA: Cannot read CPU
temperature
Check/replace Fan,
Check air vents, etc.
4-4-3-3 02FA: Cannot read CPU
temperature
Replace Motherboard
4-4-3-4 02FB: Cannot read System
temperature
Replace Motherboard
4-4-4-1 02FC: SMB Connect Failed Replace Motherboard
4-4-4-2 02FD: SMB clock chip
initialization failed
Replace Motherboard
4-4-4-3 02FE: Battery not installed Install Battery
The BIOS also can issue the following beep codes during POST:
• One long tone followed by three short tones if the video
configuration fails.
• One long tone followed by two short tones if an external ROM
module does not properly checksum to zero.
An external ROM module (LAN or Video board) can also issue audible
errors, usually consisting of one long tone followed by a series of short
tones.