User Manual

Power LED light status Possible cause Troubleshooting steps

• If the display is connected

and turned on, listen for a

beep code.

Power LED issue

Power LED is not ashing amber on ChengMing 3977 and Optiplex D8 and OptiPlex D8 AIO platforms.

ChengMing 3977 and OptiPlex D8 and D8 AIO platforms without processor installed or when processor power cable is not connected; it

may not have the power LED ashing amber as the diagnostic indicator. The BIOS behavior specication denes that:

1 If no processor is installed in the system, the power LED should ash amber in pattern of 2-3

2 If no processor cable is connected in the system, the power LED should ash amber in pattern of 2-2

Do not replace any hardware, it works as per the design. With the Boot guard (BtG) feature of Intel ME11.6, when processor power or

processor is missing, then the system will shut down.

Aected Platforms:

• ChengMing 3977

• OptiPlex 3050/5050/7050

• OptiPlex 3050 AIO/5250 AIO/7450 AIO

Dell Enhanced Pre-Boot System Assessment (ePSA)

diagnostic 3.0

You can invoke the ePSA diagnostics by either:

• Press the F12 key when the system boots and choosing Diagnostics option.

• Press Fn+PWR when the system boots.

For more details, see Dell EPSA Diagnostic 3.0.

Running the ePSA diagnostics

1 Power-on the computer.

2 As the computer boots, press the F12 key as the Dell logo appears.

3 On the boot menu screen, select the Diagnostics option.

The Enhanced Pre-boot System Assessment window is displayed.

4 Click the arrow key at the bottom left corner.

Diagnostics front page is displayed.

5 Press the arrow in the lower-right corner to go to the page listing.

The items detected are listed.

6 To run a diagnostic test on a specic device, press Esc and click Yes to stop the diagnostic test.

7 Select the device from the left pane and click Run Tests.

8 If there are any issues, error codes are displayed.

Note the error code and validation number and contact Dell.

Troubleshooting your computer