Dell Latitude 7390 Owners Manual - Page 68

Troubleshooting, Dell Enhanced Pre-Boot System Assessment — ePSA Diagnostic 3.0, Diagnostic LED,

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7 Troubleshooting Dell Enhanced Pre-Boot System Assessment - ePSA Diagnostic 3.0 You can invoke the ePSA diagnostics by either of the following ways : • Press the F12 key when the system posts and choose ePSA or Diagnostics option on One Time Boot Menu. • Press and hold Fn(Function key on keyboard) and Power On (PWR) the system. 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 16. LED pattern Blinking pattern Problem Description Ambe White r Suggested Resolution 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 3 3 BIOS recovery 1 recovery image nor found 3 4 BIOS recovery 2 recovery image found but invalid Real Time Clock reset The Real Time Clock (RTC) reset function allows you to recover your Dell system from No POST/No Boot/No Power situations. To initiate the RTC reset on the system make sure system is in a power-off state and is connected to power source . Press and hold the power button for 25 seconds and then release the power button. Go to how to reset real time clock. 68 Troubleshooting

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Troubleshooting
Dell Enhanced Pre-Boot System Assessment —
ePSA Diagnostic 3.0
You can invoke the ePSA diagnostics by either of the following ways :
•
Press the F12 key when the system posts and choose
ePSA or Diagnostics
option on One Time Boot Menu.
•
Press and hold Fn(Function key on keyboard) and
Power On
(PWR) the system.
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 16. LED pattern
Blinking pattern
Problem Description
Suggested Resolution
Ambe
r
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
3
3
BIOS recovery 1
recovery image nor found
3
4
BIOS recovery 2
recovery image found but invalid
Real Time Clock reset
The Real Time Clock (RTC) reset function allows you to recover your Dell system from
No POST/No Boot/No Power
situations. To
initiate the RTC reset on the system make sure system is in a power-off state and is connected to power source . Press and hold the
power button for 25 seconds and then release the power button. Go to
how to reset real time clock
.
7
68
Troubleshooting