Laptop screen problem

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Hi All

I have a problem with my son's laptop when you power it on the screen goes white and doesnt show anything but if you connect an external monitor it shows ok

I have tried a different working lcd screen and also changed all the cables going to the screen from the board

Did a google search and most people suggested a cable gone bad but even with them all changed still the same

Beginning to think the connection on the board must have gone

Any ideas ?

 

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The screen itself may be going bad. If such is the case, there's not much to be done.

 

I have tried another working lcd screen on it still the same


Think the laptop had been in the words of my son "bumped" slightly

so iam left with a working laptop without a screen .....oh well could always use it as a server or something hooked upto a monitor

out of every disaster ......

 

the screen of most laptops these days is the most expensive part to be fixed/replaced best to get a new latptop...its not a good thing when the screen goes bad...if other people have tried to fix the problem but its still occuring then I would not bother with it cos you will end up paying more to get it fixed...

 

From reading on the web it seems more likely a motherboard/cable issue as the backlight on the screen still comes on its just not displaying anything


That and having used another working lcd on it and getting the same result

oh well another machine to use as a server ...

 

1. The installed drivers had been corrupted. When they were deleted and new drivers installed it fixed the problem.

2. There is a bug in the old release of the driver and deleting them and installing the new ones got rid of the bug.

 

Mine is on the blink too, the back-light intermittently goes off and leaves the screen black. This seriously affects my post speed. I had the screen replaced about two years ago for a similar reason. It cost over $1000, thankfully it was still under warranty then. There is not much you can do really because of the cost, it would be about the same to buy a new laptop

 

Yes AJ that is exactly what I think the problem is too but the last time it went off under warranty for the same thing, they replaced the whole display. Is the inverter a separate board?

 

It depends on the model of laptop. Some of them have it as a seperate board, some of them get integrated into the Motherboard.

 

most modern laptops i work on have the inverter seperate from the board(pavilion and presario) just below the screen.an inverter is fairly cheap to buy.in regards to the original question
what model laptop is it?there are some models like the old style pavilion that have the graphics card seated on top of the motherboard.these can worked loose if you knock them causing the fault you described.maybe the graphics card was knocked loose and needs refitting.

 

That may well be the issue with my HP Pavilion N6271 then. Next question, how do I take the thing apart? I have removed every conceivable screw in an effort to split the top from the bottom but there is something I can't see holding the two parts together near the touch pad Any thoughts, as I would love to be able to check if the graphics card is nicely seated. It is out of warranty now btw.

Pete

 

can you e-mail me a picture of underneath and the top of the laptop.not sure which model this is(at work we dont go by model number,we go by the name of the technology used inside)
try pushing down on top of the laptop just above the keyboard to see if you get a picture.check to see if you have removed the screws under the hdd.also check to see if there are any bent pins on the connector to the monitor.

 

Thanks 808, I will email you the pics soon, my wife has taken the dig cam with her but when she returns later on, I'll do it then. Thanks for your help on this!

Pete

 

Awesome info and link AJ thank you!!

Do I have to dig out the little rubber round things, are they covering up screws, they're about 3mm in diameter???

 

Laptops are a nightmare to work on.

When taking things apart dont pull anything off too far before checking there's no small ribbon cable's attached.
These need to be detached first by lifting the two plastic lugs on either side of the plug where it goes into the board. (You will see what i mean)
These can be easily ripped off the board if your not careful and need to be soldered back on, if possible.

You will come across one when you lift the LED board off the top of the keyboard.

Not sure how far you plan to go into the laptop but i thought it's worth a mention.

Neall