Owners Manual
Table Of Contents
- Dell Precision 7820 Tower Owner's Manual
- Chassis
- Working on your computer
- Removing and installing components
- Screw size list
- Recommended tools
- Power supply unit (PSU)
- Side cover
- Front bezel
- Hard Disk Drive bezel
- Hard disk drive assembly
- NVMe Flexbay
- Slim Optical Disk Drive
- Front input and output bezel
- 5.25 inch ODD bracket
- Front input and output panel
- Input and output panel bracket
- VROC module
- Intrusion switch
- Internal chassis speaker
- Air shroud
- Memory
- Graphical processing unit(GPU)
- Coin cell battery
- System fan
- Fan bracket
- PCIe holder
- Rear system fan
- Front system fan
- Processor heat sink module
- System board
- Technology and components
- System specifications
- System Setup
- Software
- Troubleshooting
- Contacting Dell
Table 23. Diagnostic Indicator table (continued)
Power Light: Amber-White
Blinking
Amber/White Blinking
Pattern
Problem Description Suggested Resolution
2-5 2 amber blinks followed by a
short pause, 5 white blinks,
long pause, then repeats
Invalid memory installed
● Memory subsystem
configuration activity is in
progress. Memory modules
have been detected but
appear to be incompatible
or in an invalid
configuration.
● If customer can assist to
troubleshoot, narrow
down the issue by
removing one by one the
memory on motherboard
to determine which one
failed.
● Contact Tech Support.
2-6 2 amber blinks followed by a
short pause, 6 white blinks,
long pause, then repeats
Motherboard: Chipset
● Fatal system board failure
detected.
● If customer can assist to
troubleshoot, narrow
down the issue by
removing one by one the
component on
motherboard to determine
which one failed.
● If you identified any of the
components failed, replace
the Component.
● Contact Tech Support.
3-1 3 amber blinks followed by a
short pause, 1 white blink,
long pause, then repeats
RTC failure
● Replace coin cell
3-2 3 amber blinks followed by a
short pause, 2 white blinks,
long pause, then repeats
PCI Device or Video
● PCI device configuration
activity is in progress or
PCI device failure was
detected.
● If you can assist to
troubleshoot, narrow
down the issue by
reseating PCI card and
removing one by one to
determine which card
failed.
● Contact Tech Support.
3-3 3 amber blinks followed by a
short pause, 3 white blinks,
long pause, then repeats
BIOS Recovery 1
● System is in Recovery
Mode.
● Flash latest BIOS version.
If problem persists,
contact Tech Support
3-4 3 amber blinks followed by a
short pause, 4 white blinks,
long pause, then repeats
BIOS Recovery 2
● System is in Recovery
Mode.
● Flash latest BIOS version.
If problem persists,
contact Tech Support
130 Troubleshooting