Dell Vostro 2421 (Early 2013) - Manual (Page 47)

Code Cause and Troubleshooting Steps
6 Video BIOS test failure
Video card failure
7 CPU - cache test failure
Processor failure
8 Display
Display failure
LED Error Codes
Diagnostic LED codes are communicated via the Power Button LED. The Power Button LED blinks the corresponding
LED codes for the corresponding fault condition. Example: For No Memory detected (LED code 2) , The Power Button
LED blinks two times followed by a pause, blinks two times, pause, etc. This pattern continues until the system is
powered off.
Code Cause and Troubleshooting Steps
1 System board: BIOS ROM failure
System board failure, covers BIOS corruption or ROM error
2 Memory
No memory/RAM 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
6 Video BIOS test failure
Video card failure
7 CPU - cache test failure
Processor failure
8 Display
Display failure
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