Solving Hard Drive Problems - HP 280 G4 Maintenance And Service Manual

Computer powered off automatically and the Power LED flashes red four times and then white two times.
Cause
Computer powered off automatically and the Power LED flashes red three times and then white four times.
Cause
Power failure (power supply is overloaded).

Solving hard drive problems

Hard drive error occurs.
Cause
Hard disk has bad sectors or has failed.
Disk transaction problem.
Cause
Either the directory structure is bad or there is a problem with a
file.
Solution
3. If fan a plugged in and not spinning, replace it.
Solution
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.
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.
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.
Solving hard drive problems 51