notebook Does Not Start

[Nina8]

my Computer Does Not Start. 

I Performed a hard reset. Didin't work.

When I press the power button: LED lights glow, a fan spinning sound is heard, but the display remains black, and the notebook does not start.

I know that it  "indicates a problem with the basic functionality of a critical component".

I've checked memory module and bootable hard drive. Fine.

When I connect the external monitor, the "image does not display on the computer"...

is there hope for the notebook? Please, help.

[Rajarajan_K]

Thank you for contacting HP support forum 

Please find below the link for Blank screen issue. this should help you to fix the problem 

http://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c01997899

If the issue not fixed then it could be an issue with Memory (RAM) / System Board.

Try with a different Memory module and check if its working or you can try the same Memory with a different computer.

If the same memory works fine with different computer then they are an issue with the system board

[Nina8]

Hi.
I've tried the solutions for black screen... didn't work.
Changed memory RAM - didn't work. So I think the system board is dead 😢

[Rajarajan_K · Accepted solution]

Hi Nina,

As i see its a HP Probook 6550b you can get in touch with the HP support team  on 18003345144 and check if there is any repair option available you this model.