Read-Write Error; Slow Performance; Blue Screen (Bsod) Error - HP EliteBook 850 G4 Maintenance And Service Manual

Read-write error

Symptoms
● Post error message (i.e., error
code 301)
● Hang when working on data, files,
documents
Note

Slow performance

Symptoms
Slow performance even when
performing small read/write
operations
Tips & tricks

Blue screen (BSOD) error

Faulty hard drive may cause blue screen error. Perform the drive tests using the HP Diagnostics Tool to make
sure the drive is functional. If all of the tests pass, see
detailed troubleshooting steps.
136 Chapter 8 Troubleshooting guide
Possible causes
Loose connection, faulty hardware.
Troubleshooting steps
1. Perform a hard reset (8. Hard reset on page
2. Reset BIOS to default (9. Soft reset (Default Settings) on page
3. Verify drive connection and flex cable. Reseat connection
connections on page 96).
4. Use the HP Hardware Diagnostics tool to test. If failed, record failure code and have the
hard drive replaced.
5. If no error with HP PC Hardware Diagnostics (UEFI) tool, try to repair the hard drive and
its files in Windows (using command "CHKDSK /f /r /x"). Use HP Restore to
reinstall the operating system, if needed.
6. Test with a verified working hard drive. If it is not recognized, the system board is
faulty.
If there is a hard drive POST error message, see
on page 145.
Possible causes
Operating system files, hard drive is full.
Troubleshooting steps
1. Transfer data from the hard drive to create more space. Microsoft recommends at least
200 MB to sync system files.
2. Perform disk defragmentation to consolidate fragmented data on the hard drive so it
will work more efficiently.
NOTE: Do not defrag an SSD.
For optimal system performance, you need to place your operating system and all of your
most commonly used applications and files in the fastest hard drive (solid-state drive) and
fastest areas on the drive (primary partition of 200 GB max).
See Improving System Performance. Also see
Improvement on page 147).
Common Blue Screen Error Messages on page 147
95).
96).
(10. Reseat cables and
POST Error Messages and User Actions
Routine Maintenance for Performance
for