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Serendipity6084 Top Student
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DV4 2170US Laptop Boots, Display Black. External Monitor Works

DV4 2170US
Microsoft Windows 7 (64-bit)

DV4 2170US Laptop

 

Goes through boot sequence, but screeen never comes on, or even flickers. It can't be the video crd, since an evternal HDMI monitor works just fine.

 

I already tried removing the battery and cord, and draining residual power.

 

The laptop crashed during a Microsoft update on Feb 10, 2012, and I am trying to resurrect it for an online course, since the specs are pretty respectable.

 

Do I need to use my USB Flash Restore drive, reset the system (I backed everything up while connected to the external screen) and see if that fixes it?

Is it just a video driver I am missing?

Is the cable delivering data to the screen bad?

The screen looks like it did when I first bought it, no chips, cracks or scratches, so I doubt it is physically damaged, but...

 

HELP???!!!??

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DV4 2170US Laptop Boots, Display Black. External Monitor Works

Hi @Serendipity6084,

 

Thank you for visiting the HP Forums. 

 

I have check on the HP Pavilion dv42170us Notebook having an issue with the LCD screen. Yes, you are right it is not the graphics card. This could be the inverter cable on the LCD screen. This is easier to replace and the least expensive. Here is a link to your service manual page 4-40 that shows parts and how to.

 

Let me know how this goes.

 

To show appreciation for my efforts kindly click the Thumbs Up below.

 

Thanks. 

Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
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DV4 2170US Laptop Boots, Display Black. External Monitor Works

The link you sent takes me only to the manual, but page 4-40 relates to the Modem Module:

4-40.jpg

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DV4 2170US Laptop Boots, Display Black. External Monitor Works

Hi @Serendipity6084,

 

You need to check page 4-26 of the service manual.

 

Thanks.

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Serendipity6084 Top Student
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DV4 2170US Laptop Boots, Display Black. External Monitor Works

That would be the Speaker Assembly.

 

4-26.jpg

 

I am assuming you really don't have a clue...

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Hi @Serendipity6084,

 

Your Display starts at 4-27 it shows the components for removal. 

 

Thanks.

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DV4 2170US Laptop Boots, Display Black. External Monitor Works

Your first message said this was "easy to replace". It seems I have to remove at least half a dozen other components to get to the cable!!

 

1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.

2. Disconnect all external devices connected to the computer.

3. Disconnect the power from the computer by first disconnecting the power cord from the AC outlet and then disconnecting the AC adapter from the computer.

4. Remove the battery (see “Battery” on page 4-7).

5. Disconnect the wireless antenna cables from the WLAN module (see “WLAN module” on page 4-15).

6. Remove the following components:

a. Hard Drive cover (see “Hard Drive” on page 4-8)

b. Mini Card compartment cover (see “RTC battery” on page 4-12)

c. Optical drive (see “Optical drive” on page 4-19)

d. Keyboard (see “Keyboard” on page 4-20)

e. Keyboard cover (see “Keyboard cover” on page 4-23)

f. Speaker assembly (see “Speaker assembly” on page 4-26)

THEN

1. Turn the computer display-side up, with the front toward you.

2. Open the display as far as possible.

3. Remove the wireless antenna cable from the routing channels and clips  and disconnect it from the base enclosure 

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Hi @Serendipity6084,

 

Now go to the next page.

 

Thanks.

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DV4 2170US Laptop Boots, Display Black. External Monitor Works

I just posted the steps that give basic access to the signal cable. 

This seems like I have to remove a LOT of stuff to get to the (possible) problem, and then if I do not put it all back properly, I will have ANOTHER problem.

I have changed out RAM, hard drives, and optical drives on laptops, but mainly work on desktops.

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DV4 2170US Laptop Boots, Display Black. External Monitor Works

Hi @Serendipity6084,

 

I would take the Notebook to a repair center for help.

 

Thanks.

Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom left to say “Thanks” for helping.:smileyhappy:


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