Dell Vostro 3400, Service Manual

Page: 109 / 111

Diagnostic LED
This section details the diagnostic features of the battery LED.
Instead of beep codes, errors are indicated via the bicolor Battery Charge/Status LED. A specific blink pattern is followed by flashing a
pattern of flashes in amber, followed by white. The pattern then repeats.
NOTE: he 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 5. Diagnostic LED
Blinking Pattern
Possible Problem Suggested Resolution
Amber White
2 1 CPU failure Replace the system board
2 2 System Board failure (included BIOS corruption or ROM error) Flash latest BIOS version. If
problem persists, replace the
system board
2 3 No Memory/ RAM detected Confirm that the memory
module is installed properly. If
problem persists, replace the
memory module
2 4 Memory / RAM failure Replace the memory module
2 5 Invalid memory installed Replace the memory module
2 6 System board / Chipset Error / Clock failure / Gate A20 failure /
Super I/O failure / Keyboard controller failure Replace the system board
2 7 LCD failure Replace the LCD
3 1 RTC power failure Replace the CMOS battery
3 2 PCI or Video card/chip failure Replace the system board
3 3 BIOS Recovery image not found Flash latest BIOS version. If
problem persists, replace the
system board
3 4 BIOS Recovery image found but invalid Flash latest BIOS version. If
problem persists, replace the
system board
Battery status LED
Table 6. Battery status LED
Power Source LED behavior System Power State Battery Charge Level
AC Adapter Solid White S0 0-100%
AC Adapter Solid White S4/S5 < Fully Charged
Troubleshooting 109