HP 8510w - black screen, VGA-out works

Hi,

I got a HP 8510w. The internal LCD seems faulty, the most I get is a black screen, sometimes with a a few "brighter" squares.

When hooking it up to an external display via VGA (dont have HDMI-ready display), I got a proper output.

I also tried another MXM video card - same result.

Anybody a guess what is wrong? LCD itself, inverter, lvsd cable?

I have some other laptops at home, but all have a 30 pin LVDS connector, the 8510w has a 40 pin connector.

Does anybody know other laptops that have a 40 pin LVDS connector? Never ran into that, and I have trouble finding diplays of that kind - would make it easier/cheaper to try a new display, to rule out potential sources of the problem.

Any help is welcome,

Thanks in advance!

Cheers

 

Are you sure it is the screen though? Is it completely black? or can you barely see the desktop in it? If you can than the inverter need replacing. Also you should check that the display cable is not damages around the hinges area.

Are you sure that your cable has 40 pins? Isn't it the same as this one here?

If it has 30 pins you can try the screen from your other laptop. Note that the other screen might or might not work as not all screens are compatible.

 

Hi, and thanks for your answer.

I might load up pictures later, but I am one 100% sure that my 8510w has a 40 pin connector.

The screen is not completly black, but I cannot see anything relevant - there are a few brighter spots around the bezel, and sometimes, brighter rectangles over the screen (mostly right side).

Also, when hitting Fn + F4, I get output to the external VGA, which works. Hitting Fn + F4 again, does not work, meaning, I do not get "back" to internal LCD only, it stays with the external VGA output.

Thanks again - any other help very much welcome.

Thanks in advance!

Cheers

 

Here are some photos.

lvds_cable_and_connector.jpg shows the cable and connector - 40 pins indeed.

vga_out_works.jpg - as you can see, the external display works, the LCD not.
boot_1.jpg - directly at start-up, the LCD looks like this - notice the brighter rectangles/thick stirpes to the right
boot_2.jpg - a few seconds later, the LCD looks like this - the border of the LCD gets brighter, also some spots seem to get brighter than others, like a blurring effect

This blurring effect seems to be similar to what is shown in this youtube video - or maybe that is what my brain tells me, after having seen the video, hehe ... there are more videos like this on youtube, so it seems to be not that uncommon with the 8510 series.

Pressing the bezel didn't help me, I pushed and pressed all around to no avail.

Any suggestions?

Thanks in advance!

Cheers

 

Since there's definitely light on screen the inverter is working.
I'd replace the LCD cable first as it's the cheapest one, next guess would be the panel itself as clearly is shown on the video you linked.

 

Hi, and thanks for your reply

So I can rule out the inverter for sure? 100% sure, or just 99.9% sure? I just really want to be sure, so sorry for the dump follow-up question.

I actually searched arround for this cable on the web - no luck ...

"40 pins LVDS LCD cable" was my search term, and variations of this.

Can anyone tell me, why this is a 40 pin connector? Is it a 1920 x 1280 display, or why is that the case? I never ran into one of these.

Thanks in advance

Cheers

 

Use the part number in your search, there should be a sticker on the cable itself.

If the inverter was broken, the screen would be totally black. In that video there was clearly some kind of connection problem inside the display. Most of the time it's just the cable itself gone bad.

I just went thru the service manual but apparently the cable part number wasn't mentioned anywhere. You might have luck searching HP Partsurfer, but look first for the part number sticker

 

Okay, thanks - will do just that.

And just to make it clear - this is *some* video, it's not related to me and my laptop, other than it *might* be the same or a similiar problem.

I will perhaps take the LCD cover of today, if I find the time, and do some more investigation.

More opinions/suggestions are always very welcome.

Thanks in advance!

Cheers

 

I found the model number:

For future reference, it is 452208-001 6017B0104101 and you can find it on ebay.

... not sure if I go for it, though - its just around 10€, but, well ... I'll see.

Anymore suggestions are welcome, as usual.

Thanks in advance!

Cheers

 

Okay, I got it resolved.

First off, find good guides here and here.

I got this 40 pins LVDS LCD cable, but it did not help.

So I took an inverter from another laptop (Compal FL90). backlight came on for a moment, than completely dark.

So I took a display from a Compal FL90 - works.

So, the display is dead - RIP.

Thanks all for their help.

... or, anything I can do with the display at this point?

Cheers

P.S.: if ever someone comes across this thread, just PM me for questions - obviously, I will not watch this thread anymore.

 

Ouch. That's not good. I only replace components myself, I don't really repair them so I do not know if the panel could be repaired at all.

If my 8510w panel would die, I'd take it as an excuse to get WUXGA panel for it...

 

I tried to take it apart, learning that this screen REALLY break easily, hehe.

I wanted to get maybe the glas out of there, to get on another LCD with a real bad scratch.

Well, it didn't work, I cracked it - no harm done, it was toast before - no its crumbs, hehe.