HP Z400 Maintenance And Service Manual page 210

Table 6-8
Activity
Red Power LED blinks seven
times, once every second,
followed by a two- second
pause. Seven beeps.
Red Power LED blinks eight
times, once every second,
followed by a two-second
pause. Eight beeps.
198 Chapter 6 Diagnostics and troubleshooting
Diagnostic lights and audible codes (continued)
Possible cause
System board failure (ROM
detected failure prior to
video).
Invalid ROM based on bad
checksum.
Recommended action
1.
Clear CMOS.
NOTE: Refer to the Maintenance and Service Guide for the
workstation model for detailed information on clearing CMOS.
2. The problem might be on the system board. Contact HP for
assistance.
CAUTION: Internal components might be powered even when the
workstation is off. To prevent damage, disconnect the workstation power
cord before you remove a component.
1. Clear CMOS.
NOTE: Refer to the Maintenance and Service Guide for the
workstation model for detailed information on clearing CMOS.
2. Upgrade the ROM using SoftPaq from the hard disk drive, CD,
diskette, or USB removable device (for example, HP Drive Key). See
the ROM Flash section of the Maintenance and Service Guide at
http://www.hp.com/support/workstation_manuals. SoftPaq is a
self-extracting executable that lets you upgrade the ROM. The
executable contains contains use instructions, To download
Softpaq, visit http://www.hp.com/go/workstationsupport.
3. The system board might have a problem. Contact HP for assistance.
ENWW