HP EliteDesk 800 G4 Maintenance and Service Guide - Page 110

Solving CD-ROM and DVD problems

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Power LED flashes Red five times, once every second, followed by a two second pause, and the computer beeps five times. (Beeps stop after fifth iteration but LEDs continue flashing.) Cause Solution Memory is installed incorrectly or is bad. 1. Reseat DIMMs. Power on the system. 2. Replace DIMMs one at a time to isolate the faulty module. 3. Replace third-party memory with HP memory. 4. Replace the system board. Solving CD-ROM and DVD problems If you encounter CD-ROM or DVD problems, see the common causes and solutions listed in the following table or to the documentation that came with the optional device. System will not boot from CD-ROM or DVD drive. Cause The device is attached to a SATA port that has been hidden in the Computer Setup utility. Removable Media Boot is disabled in the Computer Setup utility. Network Boot is enabled in Computer Setup. Non-bootable CD in drive. Boot order not correct. Solution Run the Computer Setup utility and ensure Device Available is selected for the device's SATA port in Advanced > Port Options. Run the Computer Setup utility and enable booting to removable media in Advanced > Boot Options. Run the Computer Setup utility and disable Network Boot in Advanced > Boot Options. Try a bootable CD in the drive. Run the Computer Setup utility and change boot sequence in Advanced > Boot Options. Drive not found (identified). Cause Cable could be loose. The system may not have automatically recognized a newly installed device. The device is attached to a SATA port that has been hidden in Computer Setup. Drive responds slowly immediately after power-up. Solution Check cable connections. See reconfiguration directions in the Solving hardware installation problems on page 97 section. If the system still does not recognize the new device, check to see if the device is listed within Computer Setup. If it is listed, the probable cause is a driver problem. If it is not listed, the probable cause is a hardware problem. If this is a newly installed drive, run the Computer Setup utility and try adding a POST delay under Advanced > Power-On Options. Run the Computer Setup utility and ensure Device Available is selected for the device's SATA port in Advanced > Port Options. Run Computer Setup and increase the POST Delay in Advanced > Power-On Options. 102 Chapter 6 Troubleshooting without diagnostics

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Power LED
flashes
Red
five
times, once every second, followed by a two second pause, and the computer beeps
five
times. (Beeps
stop after
fifth
iteration but LEDs continue
flashing.)
Cause
Solution
Memory is installed incorrectly or is bad.
1.
Reseat DIMMs. Power on the system.
2.
Replace DIMMs one at a time to isolate the faulty module.
3.
Replace third-party memory with HP memory.
4.
Replace the system board.
Solving CD-ROM and DVD problems
If you encounter CD-ROM or DVD problems, see the common causes and solutions listed in the following table
or to the documentation that came with the optional device.
System will not boot from CD-ROM or DVD drive.
Cause
Solution
The device is attached to a SATA port that has been hidden in the
Computer Setup utility.
Run the Computer Setup utility and ensure
Device Available
is
selected for the device's SATA port in
Advanced
>
Port Options
.
Removable Media Boot is disabled in the Computer Setup utility.
Run the Computer Setup utility and enable booting to removable
media in
Advanced
>
Boot Options
.
Network Boot is enabled in Computer Setup.
Run the Computer Setup utility and disable Network Boot in
Advanced
>
Boot Options
.
Non-bootable CD in drive.
Try a bootable CD in the drive.
Boot order not correct.
Run the Computer Setup utility and change boot sequence in
Advanced
>
Boot Options
.
Drive not found
(identified).
Cause
Solution
Cable could be loose.
Check cable connections.
The system may not have automatically recognized a newly
installed device.
See
reconfiguration
directions in the
Solving hardware installation
problems
on page
97
section. If the system still does not
recognize the new device, check to see if the device is listed within
Computer Setup. If it is listed, the probable cause is a driver
problem. If it is not listed, the probable cause is a hardware
problem.
If this is a newly installed drive, run the Computer Setup utility
and try adding a POST delay under
Advanced
>
Power-On
Options
.
The device is attached to a SATA port that has been hidden in
Computer Setup.
Run the Computer Setup utility and ensure
Device Available
is
selected for the device's SATA port in
Advanced
>
Port Options
.
Drive responds slowly immediately after power-up.
Run Computer Setup and increase the POST Delay in
Advanced
>
Power-On Options
.
102
Chapter 6
Troubleshooting without diagnostics