Solving Display Problems - HP Z1 Maintenance And Service Manual

Table 4-2
Problem
Nonsystem disk or
NTLDR missing
message.
Workstation will not
start.

Solving display problems

Table 4-3
Problem
Blank screen (no video).
66 Chapter 4 Diagnostics and troubleshooting
Hard drive problems (continued)
Cause
System is trying to start
from non-bootable
media.
System is trying to start
from a damaged hard
drive.
System files missing or
not properly installed.
Hard drive boot
disabled in Computer
Setup.
Hard drive is damaged.
Internal LCD display problems
Cause
Cable connections are
not correct.
Screen blanking utility
installed or energy
saver features
enabled.
System ROM is bad;
system is running in
FailSafe Boot Block
mode (indicated by 8
beeps).
Backlight circuit on
motherboard is
damaged.
Computer is in
Hibernate mode.
Solution
Remove the media device.
1.
Insert bootable media and restart the computer.
2.
If the hard drive is still inaccessible and MBR Security is
enabled, try restoring the previously saved MBR image by
entering the Computer Setup (F10) Utility and selecting
Security > Restore Master Boot Record.
1.
Insert bootable media and restart the computer.
2.
Verify that the hard drive is partitioned and formatted.
3.
Install the system files for the appropriate operating system,
if necessary.
Run the Computer Setup (F10) Utility and enable the hard drive entry
in the Storage>Boot Order list.
Replace the hard drive.
Solution
1. Verify the LCD display cable connection to J16 on the system
board and to the internal LCD panel connector.
2.
Verify the LCD sync/backlight cable connection to P2 on the
system board and to the sync connector and the LED power
connector on the internal LCD panel.
Press a key or the mouse button and, if set, enter your password.
Reflash the ROM using a SoftPaq.
Replace the motherboard.
Press the power button to resume from Hibernate mode.