Can't find any answers to my intermittent black screen

Hi,
I have a problem with my screen going suddenly black. HP have been of no help at all and I’m doing this out of frustration.
I have a:
Pavillion DV6
Product: WF649PA#ABG
DV6-2120TX
The screen is a LG model: LP156WH2 (TL)(Q1)
OS: Windows 32 bit 7 home.

The problem started sometime ago with the screen suddenly going black, it only happened occasionally and then as time passed would do it every few minutes. I could reset it by closing the lid to go to sleep and then logging in again.
I tried an external monitor and it works fine on that when screen goes black.
Shine a torch into black screen and its working away in the blackness.
Did a HP hard reset (battery out & all attached devises unhooked and pressing start button for 1 minute) and worked fine for 2+ days and then started old routine of every few minutes.
Researched problems on the net and come up with Display Inverter problems.
Started to strip screen apart looking for inverter and could not find one, but got the number of screen as above. After more research the net tells me I have a LED screen which does not use an inverter.
HP parts book lists a Display Inverter part # 488317-001 for my model. Now I’m getting confused.

If I don’t have an inverter will it be a faulty screen or something else? Since removing screen yesterday the black screen has settled down and only does it every hour or so.

Any input would be of assistance. Not really keen to upgrade to Win 10 at this stage!!

 

If you can go back to the HP support site and download the Service Manual for your particular laptop, it would show you where all of the parts are including the inverter board. Although my laptop is a different brand (Dell), I needed my Service Manual (I printed it out) to be able to replace the system board, graphics card, inverter board and flex cable, and to be able to add bluetooth capabilities.

 

Thanks for your reply.
I have downloaded the parts and workshop manuals. Yes they do show an inverter board below the screen. I do have a empty space below the screen but no inverter. My laptop uses a LED screen and research on the net is telling me that LED screens do not use an inverter. Is this correct or have HP hid the inverter in the main body of the laptop?
Thanks