
Real-Time Clock (RTC Reset)
The Real Time Clock (RTC) reset function allows you or the service technician to recover Dell systems from No POST/No
Power/No Boot situations. The legacy jumper enabled RTC reset has been retired on these models.
Start the RTC reset with the system powered off and connected to AC power. Press and hold the power button for 20 seconds.
The system RTC Reset occurs after you release the power button.
Backup media and recovery options
It is recommended to create a recovery drive to troubleshoot and fix problems that may occur with Windows. Dell proposes
multiple options for recovering Windows operating system on your Dell PC. For more information. see
.
WiFi power cycle
About this task
If your computer is unable to access the internet due to WiFi connectivity issues a WiFi power cycle procedure may be
performed. The following procedure provides the instructions on how to conduct a WiFi power cycle:
NOTE:
Some ISPs (Internet Service Providers) provide a modem/router combo device.
Steps
1. Turn off your computer.
2. Turn off the modem.
3. Turn off the wireless router.
4. Wait for 30 seconds.
5. Turn on the wireless router.
6. Turn on the modem.
7. Turn on your computer.
Troubleshooting
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Summary of Contents for OptiPlex 3090 Ultra
Page 16: ...17 Lock the device and the stand cover 16 Stands ...
Page 17: ...18 Press the power button to turn on the device Stands 17 ...
Page 27: ...12 Slide the back cover along with the device into the stand until you hear a click Stands 27 ...
Page 28: ...13 Lock the device and the stand cover 28 Stands ...
Page 29: ...14 Press the power button to turn on the device Stands 29 ...
Page 39: ...Stands 39 ...
Page 40: ...40 Stands ...
Page 45: ...Stands 45 ...
Page 47: ...Stands 47 ...
Page 49: ...9 Slide and release the inner bar on the lower edge of the stand cover Stands 49 ...
Page 54: ...Large Height Adjustable Stand 54 Stands ...
Page 56: ...15 Lock the device and the stand cover 56 Stands ...
Page 57: ...16 Press the power button to turn on the device Stands 57 ...
Page 59: ...4 Disconnect the keyboard mouse network power and display cable from the device Stands 59 ...
Page 63: ...For 30 inch to 32 inch monitor Large height adjustable stand Stands 63 ...
Page 64: ...For monitors 32 inch Large height adjustable stand 64 Stands ...
Page 72: ...k Close the stand cover 72 Stands ...
Page 73: ...l Lock the device and the stand cover Stands 73 ...
Page 79: ...h Press the power button to turn on the device Stands 79 ...
Page 81: ...b Open the wall mount cover Stands 81 ...
Page 82: ...c Disconnect the keyboard mouse network power and display cable from the device 82 Stands ...
Page 83: ...d Snap open the wall mount bracket module from the slots on the wall mount Stands 83 ...
Page 90: ...Major components of your system 1 Cover 90 Removing and installing components ...