HP EliteOne 1000 Maintenance and Service Guide - Page 80

Solving hard drive problems

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Power LED flashes Red four times, once every second, followed by a two second pause, and the computer beeps four times. (Beeps stop after fifth iteration but LEDs continue flashing.) Computer powered off automatically and the Power LED flashes red three times and then white four times. Cause Solution Power failure (power supply is overloaded). 1. If equipped with a voltage selector, check that the voltage selector, located on the rear of the power supply (some models), is set to the appropriate voltage. Proper voltage setting depends on your region. 2. Open the access panel and ensure the power supply cable is seated into the connector on the system board. 3. Check if a device is causing the problem by removing ALL attached devices (such as hard drives or optical drives and expansion cards). Power on the system. If the system enters POST, then power off and replace one device at a time and repeat this procedure until failure occurs. Replace the device that is causing the failure. Continue adding devices one at a time to ensure all devices are functioning properly. 4. Replace the power supply. 5. Replace the system board. Solving hard drive problems Hard drive error occurs. Cause Hard disk has bad sectors or has failed. Solution 1. In Windows 10, type file in the taskbar search box, and then select File Explorer from the list of applications. In the left column, expand This PC, right-click on a drive, select Properties, and then select the Tools tab. Under Error checking click Check. 2. Use a utility to locate and block usage of bad sectors. If necessary, reformat the hard disk. Disk transaction problem. Cause Either the directory structure is bad or there is a problem with a file. Solution In Windows 10, type file in the taskbar search box, and then select File Explorer from the list of applications. In the left column, expand This PC, right-click on a drive, select Properties, and then select the Tools tab. Under Error checking click Check. Drive not found (identified). Cause Cable could be loose. The system may not have automatically recognized a newly installed device. Solution Check cable connections. See reconfiguration directions in the Solving hardware installation problems on page 77 section. If the system still does not 72 Chapter 7 Troubleshooting without diagnostics

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Power LED
flashes
Red four times, once every second, followed by a two second pause, and the computer beeps four times. (Beeps
stop after
fifth
iteration but LEDs continue
flashing.)
Computer powered
off
automatically and the Power LED
flashes
red three times and then white four times.
Cause
Solution
Power failure (power supply is overloaded).
1.
If equipped with a voltage selector, check that the voltage
selector, located on the rear of the power supply (some
models), is set to the appropriate voltage. Proper voltage
setting depends on your region.
2.
Open the access panel and ensure the power supply cable is
seated into the connector on the system board.
3.
Check if a device is causing the problem by removing ALL
attached devices (such as hard drives or optical drives and
expansion cards). Power on the system. If the system enters
POST, then power
off
and replace one device at a time and
repeat this procedure until failure occurs. Replace the device
that is causing the failure. Continue adding devices one at a
time to ensure all devices are functioning properly.
4.
Replace the power supply.
5.
Replace the system board.
Solving hard drive problems
Hard drive error occurs.
Cause
Solution
Hard disk has bad sectors or has failed.
1.
In Windows 10, type
file
in the taskbar search box, and
then select
File Explorer
from the list of applications. In the
left column, expand
This PC
, right-click on a drive, select
Properties
, and then select the
Tools
tab. Under
Error
checking
click
Check
.
2.
Use a utility to locate and block usage of bad sectors. If
necessary, reformat the hard disk.
Disk transaction problem.
Cause
Solution
Either the directory structure is bad or there is a problem with a
file.
In Windows 10, type
file
in the taskbar search box, and then
select
File Explorer
from the list of applications. In the left
column, expand
This PC
, right-click on a drive, select
Properties
,
and then select the
Tools
tab. Under
Error checking
click
Check
.
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
77
section. If the system still does not
72
Chapter 7
Troubleshooting without diagnostics