Dell Vostro 2421 (Early 2013) - Manual (Page 46)

Table 7. Battery Status Lights
Alternately blinking amber light and blue light An unauthenticated or unsupported non-Dell AC adapter
is attached to your laptop.
Alternately blinking amber light with steady blue light Temporary battery failure with AC adapter present.
Constantly blinking amber light Fatal battery failure with AC adapter present.
Light off Battery in full charge mode with AC adapter present.
Solid white light on Battery in charge mode with AC adapter present.
The lights located above the keyboard indicate the following:
Table 8. Keyboard Status Lights
Turns on when the numeric keypad is enabled.
Turns on when the Caps Lock function is enabled.
Turns on when the Scroll Lock function is enabled.
Beep Codes
The computer may emit a series of beeps during start-up if the display cannot show errors or problems. These series of
beeps, called beep codes, identify various problems. The delay between each beep is 300 ms, the delay between each
set of beeps is 3 seconds, and the beep sound lasts 300 ms. After each beep and each set of beeps, the BIOS should
detect if the user presses the power button. If so, BIOS will jump out from looping and execute the normal shutdown
process and power system.
Code Cause and Troubleshooting Steps
1 BIOS ROM checksum in progress or failure
System board failure, covers BIOS corruption or ROM error
2 No RAM detected
No memory detected
3 Chipset Error (North and South Bridge Chipset, DMA/IMR/ Timer Error) , Time-Of-Day Clock test
failure , Gate A20 failure , Super I/O chip failure , Keyboard controller test failure
System board failure
4 RAM Read/Write failure
Memory failure
5 Real-time clock power fail
CMOS battery failure
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