DV6000 vertical lines on LCD but external is fine (I'm aware of the common issues)

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Benchtech

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Ok, so laptop has vertical lines on the laptops lcd, but the video is fine on an external monitor.

What I've done so far:
changed out screen (5 so far)
changed out video cable (on the previous 5 lcds)

the results from those tests are a lit black screen but no post.
 
Last edited:
If it has lines I would say the screen. If it now just has a lit black screen I would say it has to be the GPU.

I'm surprised there hasn't been another class action suit to force HP and Nvidia to replace these things. I have had three bad ones this week. The only good thing is that I have been able to find new mobos for two of them for less than $100 so the customers have opted to fix them rather than adding to my pile of dead DVs (I literally have a pile of dead DVs).

I have, of course, informed these customers that there is no guarantee that the new mobo will last any longer or shorter than their current one and they are okay with it.
 
trapped said:
If it has lines I would say the screen.
Click to expand...


He changed out the screen (five times?) and no result. The lines on the LCD indicate a sync issue, as a result of a failing gpu. The way this problem can present itself varies widely, this is one way.
 
It wasn't clear if the lines were still there after the first screen was replaced. I have seen plenty of screens with vertical or horizontal lines and even slices or half the screen missing that were the result of a damaged LCD.

I don't totally understand the 5x thing, but I would have at least tried for a second one if it didn't cost me anything. I'm sure everyone who replaces LCDs on a regular basis has had at least one that either isn't a direct replacement or was damaged in shipping. I actually had one that was U-shaped when I received it.

If the lines are still there I would think it must be a bad GPU. I had a DV2500 that looked like 8-bit color. I would have thought a driver problem (probably didn't help that I had another system in the same week that was due to the wrong driver being loaded) or bad screen for sure, but only a new mobo fixed it.


I'm not trying to be argumentative, just laying out my thought process (however right or wrong) when I run across this type of problem.
 
I'll update the OP but I get a perfect picture when connecting to an eternal monitor so it's not the GPU. If it was the gpu i would not get an external picture (just saying).
 
Benchtech said:
I'll update the OP but I get a perfect picture when connecting to an eternal monitor so it's not the GPU. If it was the gpu i would not get an external picture (just saying).
Click to expand...

That is exactly what I'm saying.....external video does not rule out gpu. (And honestly, ive been saying this on technibble for a long time and very few people seem to understand that this is possible) It is not actually the gpu failing, but the solder connections on the chip. Depending on which ones break, the external can work despite the internal not working....i see it all the time. The lines are a result of a sync issue to the internal lcd....
 
abyssinian said:
+1...I wouldn't go as far as to say that I see it all the time, but I have seen it more than once.
Click to expand...

This is a first for me in this series of laptops they usually don't have video on both internal and external. I'll break out the heat gun tomorrow, need to invest in a thermal gun.
 
abyssinian said:
+1...I wouldn't go as far as to say that I see it all the time, but I have seen it more than once.
Click to expand...


I think that I must get a very high number of these systems in my shop...it seems like for a while they were the only thing I was fixing. I saw this particular symptom probably at least 20-30 times this year, along side all of the other more common symptoms.
 
Benchtech said:
I'll update the OP but I get a perfect picture when connecting to an eternal monitor so it's not the GPU. If it was the gpu i would not get an external picture (just saying).
Click to expand...

I had a DV9000 which displayed these symptoms.

It was fine on an external monitor though on the actual LCD displayed a white, what looked like interlaced screen.

It was the GPU.
 
14049752 said:
He changed out the screen (five times?) and no result. The lines on the LCD indicate a sync issue, as a result of a failing gpu. The way this problem can present itself varies widely, this is one way.
Click to expand...

I see this with bad GPUs all the time as you connect external video it shifts to lower resolutions which may not make the anomalies show through the external. If you see enough video problems as a tech you can pretty much guess correctly 99% or the time if its a GPU issue or display issue. The external video check is mostly just a quick verification tool.
 
Just did the heat treatment and it's working only question is (just like it always is with these) for how long?

Time to print out the nvidia settlement so I can show customers again....
 
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