1 Working on your computer............................................................................................................ 4
Safety instructions.................................................................................................................................................................4
Before working inside your computer........................................................................................................................... 4
Safety precautions...........................................................................................................................................................5
Electrostatic discharge—ESD protection.................................................................................................................... 5
ESD field service kit ........................................................................................................................................................6
Transporting sensitive components.............................................................................................................................. 6
After working inside your computer.............................................................................................................................. 7
2 Technology and components......................................................................................................... 8
DDR4....................................................................................................................................................................................... 8
USB features..........................................................................................................................................................................9
USB Type-C...........................................................................................................................................................................11
Advantages of DisplayPort over USB Type-C.................................................................................................................. 11
HDMI 2.0................................................................................................................................................................................11
Intel Optane memory........................................................................................................................................................... 12
Enabling Intel Optane memory......................................................................................................................................12
Disabling Intel Optane memory.....................................................................................................................................13
3 Troubleshooting..........................................................................................................................14
Enhanced Pre-Boot System Assessment — ePSA diagnostics.................................................................................... 14
Running the ePSA Diagnostics..................................................................................................................................... 14
Diagnostics............................................................................................................................................................................14
Diagnostic error messages..................................................................................................................................................16
System error messages.......................................................................................................................................................19
4 Getting help...............................................................................................................................20
Contacting Dell.................................................................................................................................................................... 20
Contents
Contents 3