A problem with Probook 4540s BIOS!!!

[Cuongvd]

I have probook 4540s laptop, two day ago, i updated the BIOS. I dowloaded the BIOS from http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareIndex.jsp?lang=en&cc=us&prodNameId=5269095&... After that, i couldn't turn on my laptop. It just have had blank screen and Caplock light blink 3 time. Can you help me!!!

[Cuongvd]

No one help me :((

[Cloud_Strider]

The following was taken from here.

Code descriptions

Use the following table to learn about the meaning of a code that your computer may encounter.

Code type Number of Blinks or Beeps Component Being Checked Condition Possible solution(s)

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. Service
Caps Lock/Num Lock	2	BIOS	BIOS corruption failure	Restore BIOS from onboard backup (jumpers) Service
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. Service
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) Service
Beep	Varies	Varies	Varies	Reseat memory modules (see next section). Service 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.

[Cuongvd]

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.

[Cloud_Strider · Accepted solution]

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.

[MasterUMC]

If you're in the USA, you're going to need to contact a 3rd party BIOS repair facility like AQSTECH 

Probook / Elitebook BIOS recovery / repair is not easy.

[Cuongvd]

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.

[Cloud_Strider]

You are most welcome.  I am glad it is up and running once again. 

Thanks for letting the community know what the solution was.  🙂

[Bane179]

sounds like they took the easy way out to me. There has to be a fix to this. My power button just blinks off and on when I plug in the charger, does nothing else.. To new to buy a new motherboard for that buy a new lap top..