There are 3 main manufacturers of Bios's . These are:
* 1 beep - everything is ok
* 2 beeps - memory parity error (reseat or replace the memory)
* 3 beeps - memory read or write error (reseat or replace the memory)
THE AWARD BIOS
* 1 long, 2 short beeps - graphics card error (reseat or replace the graphics card)
* 1 long, 3 short beeps - no graphics card, or graphics memory error (install or replace the graphics card)
* 2 short beeps - memory error (reseat or replace the memory)
* 1 high pitched beep - processor overheating
* 1 high pitched beep, one low pitched beep - processor error
THE PHEONIX BIOS
Pheonix BIOSes produce a series of beeps, separated by a pause. So beep...beep, beep, beep...beep...beep would be 1-3-1-1:
* 1-1-4-1 - level 2 cache erro (reseat or replace the processor)
* 1-2-2-3 - BIOS ROM checksum (replace the BIOS chip or motherboard)
* 1-3-1-1 - memory refresh test failure (reseat or replace the memory)
* 1-3-1-3 - keyobard control failure (replace the motherboard)
* 1-3-4-1 - memory failure (reseat or replace the memory)
* 1-4-1-1 - memory refresh test failure (reseat or replace the memory)
* 2-1-2-3 - BIOS error (replace the BIOS chip or motherboard)
* 2-2-3-1 - IRQ problem (remove expansion cards or replace the motherboard)
In most Dell laptops, 7 beeps indicates to processor failure.You may follow these steps if you are comfortable in opening up the system:
1. Remove main battery.
2. The bottom plate for the system
3. With the battery compartment nearest to you in the top left corner you will see the CMOS battery.
4. Using a minimal amount of force and a flat tool, pry the battery gently from its seat (it is held on by sticky substance).
5. Unplug the battery from the motherboard by disconnecting the white connector.
6. Wait for two to five minutes and then reattach the battery cable and reseat the battery.
7. Replace the rear plate and the retaining screws and reseat the main battery.
8. Attach the AC adapter and power on the system.
9. If a 5 beep code is heard, switch off the system and restart it.
10. When the system restarts and completes POST successfully, browse to the Drivers and Downloads page. http://dell.to/Sd9ofv
11. Download and install the latest BIOS Version.
If you do not wish to perform the above steps, then you may try performing Pre Boot System Assessment (PSA Diagnostic) by holding the “Fn” while rebooting the system. Keep holding "Fn” key until the diagnostic gets initiated. Please refer to the link below for details:
XGA -> Display property should show 1024 x 768 ,
WXGA -> Display property should show 1280 x 800 ,
WXGA+ -> Display property should show 1440 x 900 ,
SXGA -> Display property should show 1280 x 1024 ,
SXGA+ -> Display property should show 1400 x 1050 ,
WSXGA -> Display property should show 1280 x 854 ,
WSXGA+ -> Display property should show 1680 x 1050 ,
UXGA -> Display property should show 1600 x 1200 ,
WUXGA -> Display property should show 1920 x 1200.