01-27-2013 03:23 AM
I have probook 4540s laptop, two day ago, i updated the BIOS. I dowloaded the BIOS from http://h20000.www2.hp.com/bizsupport/TechSupport/S
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01-28-2013 08:47 AM - edited 01-28-2013 08:52 AM
The following was taken from here.
|AC power adapter LED||Constantly on||Power adapter||OK. Power is being supplied.||None. The power adapter is likely not the problem.|
|AC power adapter LED||Constantly off||Power adapter||Power is not being supplied||Try a different power outlet.|
Replace power adapter.
|AC power adapter LED||Continuous blinking||Power adapter||Insufficient power||Try a different power outlet.|
Replace power adapter.
|Caps Lock/Num Lock||1||CPU||CPU not functional||Reseat replace CPU.|
|Caps Lock/Num Lock||2||BIOS||BIOS corruption failure||Restore BIOS from onboard backup (jumpers)|
|Caps Lock/Num Lock||3||Memory||Memory module error not functional||Reseat memory modules (see next section).|
Test memory from UEFI or BIOS.
Replace bad memory modules.
|Caps Lock/Num Lock||4||Graphics||Graphics controller not functional||Service|
|Caps Lock/Num Lock||5||System board||General system board failure||Service|
|Caps Lock/Num Lock||6||BIOS||BIOS authentication failure||Restore BIOS from onboard backup (jumpers)|
|Beep||Varies||Varies||Varies||Reseat memory modules (see next section).|
For more detail on the exact code, search the Internet for "beep code" and the manufacturer of your BIOS - such as AMI or Award.
The caps lock blinking three times indicates it is related to the RAM.
You can try disconnecting everything including the battery and the AC charger, holding the power button for one minute, and then turning it on.
If that does not help, then you can try removing each RAM module and trying with them one at a time.
Page 60 of this guide details how to remove the RAM should you need it.
01-28-2013 08:34 PM
Thanks a lot!!
But i replaced a RAM from another laptop, and it's still not working. Ạnd when i put the RAM to laptop of my friend. It worked normally. I think it is not a RAM error.
01-29-2013 08:14 AM
Have you tried one RAM module in each slot or was both slots used at the same time?
RAM issues can either be with the RAM itself or the RAM slots on the motherboard.
In the event that the POST test is wrong, although rare, you could try restoring the BIOS using the steps in this document.
You will need the UEFI Support Environment download to create the recovery USB drive. It can be found here.
Let me know what happens.
02-02-2013 08:54 AM
Thanks Cloud_Strider so much. I bring my laptop to HP center and they said that my mainboard was death. They changed a new mainboard. And now, my laptop can work again.
02-04-2013 07:00 AM