Service Manual

The boot menu screen is displayed.

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.

The Diagnostics front page is displayed.

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

The detected items are listed.

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

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

If there are any issues, error codes are displayed. Note the error code and validation number, and contact Dell.

Power behavior

Table 17. Power behavior

AC adapter System behavior POST error message

AC adapter power is greater than or equal

to the system power requirement at full

CPU speed.

System boots normally and allows CPU to

run at full speed.

None

AC adapter Power is less than the system

power requirements at full CPU speed.

Lower the maximum CPU speed to a value

that does not exceed the power available by

the AC adapter.

Alert—xxxxxxW AC power adapter has

been detected, which is less than the

recommended xxxxxxW AC adapter

originally shipped. The system adjusts the

performance to match the power available.

Connect a Dell xxxxxxW AC adapter or

greater for best system performance.

AC adapter is not genuine Dell. Limit the CPU speed to the lowest possible

value.