Screen is not working

[3v3ry0n3]

Hello, I'll just start this off by saying I'm new to this community.
I don't really know anything about laptop things but I do alot of research when I encounter a problem.

So, 3 weeks ago, when I woke up, half of my laptop's screen is darker than normal. So I took it to a local repair store, they said that my LCD is broken (which I was too gullible to believe). So, I just left it and ignored the problem (because LCD costs an arm and a leg in my country).

Then, yesterday, when I opened my laptop, the screen is not working. It had some colorful lines and a black screen but sometimes it changes to white screen, black screen and half white half black screen. I took it to 3 different repair shops and they all said its an LCD issue. But I did some research and I saw an HP support page that has each kinds of broken LCD symptoms, but not even one picture of that page matched my screen so I think its not a LCD issue. I researched further and now I think my LCD ribbon cable is broke or whatever. 

The picture below is what my screen looks like, I'm using an external monitor and I can see the screen clearly.

[MKazi · Accepted solution]

@3v3ry0n3

Welcome to HP Support Forums. 

This is great place to find answers for your technical questions.

This is MKazi is at your service. 

I understand that you have an HP Pavilion Notebook - 17-g192dx and the display has gone bad. I read that the screen does not appear to be broken and the laptop works fine with an external monitor connected to it. Fabulous diagnostics, spectacular analysis of the issue by you. Kudos to you for that. 

If there has been no accidental damages to the screen and this happened all by itself then the internal display cable might have gone bad. 

You may checkout how the display cable looks like in the below image:

# 6 is the display cable.

Also, please click here to access the service guide for the laptop. It explains how to replace the various components in the laptop. 

The display cable part number is 809292-001 and it is available at the HP PartSurfer website or you should be able to get it a local computer store.

Please note that if the issue persists even after replacing the display cable then the screen is defective. 

I hope this information helps. Feel free to keep me posted for any further questions.

Cheers!