Contents
1 Working on your computer............................................................................................................................. 4
Safety instructions............................................................................................................................................................. 4
Before working inside your computer........................................................................................................................4
Safety precautions.......................................................................................................................................................5
Electrostatic discharge—ESD protection.................................................................................................................5
ESD eld service kit ....................................................................................................................................................6
Transporting sensitive components........................................................................................................................... 7
After working inside your computer...........................................................................................................................7
2 Technology and components..........................................................................................................................8
DDR4................................................................................................................................................................................... 8
DDR4 Details.................................................................................................................................................................8
Memory Errors..............................................................................................................................................................9
USB features...................................................................................................................................................................... 9
USB 3.0/USB 3.1 Gen 1 (SuperSpeed USB)............................................................................................................10
Speed........................................................................................................................................................................... 10
Applications.................................................................................................................................................................. 11
Compatibility................................................................................................................................................................ 11
USB Type-C........................................................................................................................................................................11
Alternate Mode............................................................................................................................................................ 11
USB Power Delivery................................................................................................................................................... 12
USB Type-C and USB 3.1........................................................................................................................................... 12
Advantages of DisplayPort over USB Type-C...............................................................................................................12
HDMI 2.0............................................................................................................................................................................12
HDMI 2.0 Features......................................................................................................................................................12
Advantages of HDMI..................................................................................................................................................13
Intel Optane memory........................................................................................................................................................13
Enabling Intel Optane memory.................................................................................................................................. 13
Disabling Intel Optane memory................................................................................................................................. 13
3 Troubleshooting............................................................................................................................................15
Enhanced Pre-Boot System Assessment — ePSA diagnostics.................................................................................15
Running the ePSA Diagnostics................................................................................................................................. 15
Diagnostics........................................................................................................................................................................ 15
Diagnostic error messages...............................................................................................................................................17
System error messages...................................................................................................................................................20
4 Getting help.................................................................................................................................................22
Contacting Dell................................................................................................................................................................. 22
Contents
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