Troubleshooting
Dell Enhanced Pre-Boot System Assessment (ePSA)
diagnostic 3.0
You can invoke the BIOS and ePSA diagnostics by either:
NOTE:
As the rugged tablet is without keyboard, perform the following ePSA diagnostic.
•
To enter BIOS (system setup) without keyboard,
Power
on system. Press on
Volume decrease
button during startup (as the Dell Logo
appears) until the BIOS (system setup) screen is displayed.
•
To enter ePSA (system setup) without keyboard,
Power
on system. Press on
Volume increase
button during startup (as the Dell Logo
appears) until the BOOT Menu screen is displayed.
NOTE:
Use the Volume increase button to navigate to respective diagnostic and press on Volume decrease button to
select the required option.
Diagnostic LED
This section details the diagnostic features of the battery LED in a notebook.
Instead of beep codes errors are indicated via the bicolor Battery Charge LED. A specific blink pattern is followed by flashing a pattern of
flashes in amber, followed by white. The pattern then repeats.
NOTE:
The diagnostic pattern will consist of a two digit number being represented by a first group of LED blinks (1 through 9) in
amber, followed by a 1.5 second pause with the LED off, and then a second group of LED blinks (1 through 9) in white. This is
then followed by a three second pause, with the LED off, before repeating over again. Each LED blink takes 0.5 seconds.
The system will not shutdown when displaying the Diagnostic Error Codes. Diagnostic Error Codes will always supersede any other use of
the LED. For instance, on Notebooks, battery codes for Low Battery or Battery Failure situations will not be displayed when Diagnostic
Error Codes are being displayed:
Table 10. LED pattern
Blinking pattern
Problem Description
Suggested Resolution
Amber White
2
1
processor
processor failure
2
2
system board, BIOS ROM
system board, covers BIOS corruption or ROM error
2
3
memory
no memory/no RAM detected
2
4
memory
memory failure/RAM failure
2
5
memory
invalid memory installed
2
6
system board; chipset
system board/ chipset error
2
7
display
display failure
3
1
RTC power failure
coin-cell battery failure
3
2
PCI/Video
PCI/Video card/chip failure
7
70
Troubleshooting
Summary of Contents for Latitude 12 7212
Page 26: ...26 Removing and installing components ...
Page 79: ...Ecosystem Accessories 79 ...