Blank screen, no display, fan works power light & hard drive led on.

[I-D1]

Machine was working normally, no recent additions or changes. Windows 10 installed about 1 year ago. Turned on the computer & had a blank screen, not black, no display at all. Power light & hard drive led lit and the fan worked. Wireless keyboard did not display lights for caps lock or num lock. Read that motherboard was most likely issue so I replaced it with a new one of the exact part #. Now the keyboard lights work & the display comes to life but it just flashes red, green, blue, white, black for a time then goes blank. I also then replaced the video card with the same results. I went through the troubleshooting docs from HP trying to reset BIOS but no luck. Any help???

[The_Fossette]

Hi @I-D1

Welcome to the HP Forums!

Thank you for posting your query in this forum, it's a great place to find answers.

I reviewed your post and I understand that the computer is not booting to windows and the computer displays different colors.

I’d love to help!

As you have mentioned that you have already replaced the motherboard and the video card, I recommend you to try the steps in the below article and check if it helps.

http://hp.care/2dMCqb8

If the issue persists, I recommend you to contact phone support to further diagnose the issue.

Let me know how it goes and you have a great day!

To simply say thanks, please click the "Thumbs Up" button to give me a Kudos to appreciate my efforts to help. If this helps, please mark this as “Accepted Solution” as it will help several others with the same issue to get it resolved without hassles.

Take care.

Cheers!

[I-D1]

Thanks for your input! I've already gone through all those steps multiple times...I'm now thinking that the "new" motherboard is defective since it works to some extent...brings the display to life & lights up the keyboard. I'm returning it for a refund & I'll look for another one. I'll keep you posted on what happens.
Thanks again for your help!

[The_Fossette · Accepted solution]

Hi @I-D1

Thank you for posting back.

Sure, please check with a different motherboard and check if it helps.

If any other questions arise, please feel free to write back to me.

Keep me posted and I hope you have a good day ahead.

Take care.

Cheers!

[I-D1]

Okay, the latest update...I ordered another motherboard and...SUCCESS!!! Everything is back to normal again! So the first board was defective. What a hassle! Thanks for your support.

[The_Fossette]

Hi @I-D1

Thank you for posting back.

Perfect, I am really glad to hear that! 

If any other questions arise, please feel free to write back to me.

Take care.

Cheers!