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Dell m1330 LCD dim, help

post #1 of 31
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Hey guys, so like the the title says I have dim lcd on my dell m1330 notebook. The warranty has been expired for a couple of years now. initially the original lcd had gained all these defects over time in the image from being pressed to hard from the back. In the past year it has become totally dim, a level up from having the back-light completely off id say.

So I decided to fix it up and let my sister you use it, I replaced the lcd and it was still dim but fixed the defects on the screen obviously. So then I figured it was a faulty inverter, so I replaced that as well and booted it up today with new lcd and inverter and the screen is still dim.

I tried going to the bios and adjusting the brightness but it already is maxed out on ac and battery setting. It also stays dim no matter what, pressing Fn+arrow up doesn't nothing beside show the icon on the lcd that you have either increased or decreased the brightness but physically nothing has changed.

I am lost as to what else it can be.
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post #2 of 31
Hey there mate
What OS are you running?
Have you looked in power-saving options and cranked the brightness all the way up?
When you fire it up, is the bios dim or does it only get dimmer when you enter the OS?
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post #3 of 31
Recently had an hp with similar problem, next step would be replacing the motherboard ..
Edit: at least if it's dim in bios and you tried the fn combo to increase brightness
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post #4 of 31
Thread Starter 
Quote:
Originally Posted by MGX1016 View Post
Recently had an hp with similar problem, next step would be replacing the motherboard ..
Edit: at least if it's dim in bios and you tried the fn combo to increase brightness
It is dim in the bios, and I have tried the fn combo with no luck. Using Windows 7 Pro x86. I tried it with live cd of linux no luck.

although on external video is fin and not dim.
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post #5 of 31
It's possible the wire is fried, a connector is bad, or the socket is fried even (where the GPU goes, remember a lot of electricity is run on that thin little wire for video output and power). It's rather cheap quality stuff, I wish they used higher quality builds on laptops but alas laptops have fallen in price so much..
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post #6 of 31
Thread Starter 
Quote:
Originally Posted by MGX1016 View Post
It's possible the wire is fried, a connector is bad, or the socket is fried even (where the GPU goes, remember a lot of electricity is run on that thin little wire for video output and power). It's rather cheap quality stuff, I wish they used higher quality builds on laptops but alas laptops have fallen in price so much..
so you think I should try and replace the lcd/inverter cable ? I mean other than the motherboard replacement which I don't think is worth the money for a machine like this.
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post #7 of 31
See if you can get a cheap board on eBay, otherwise yes check the cable... Doubt it though
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post #8 of 31
Thread Starter 
Quote:
Originally Posted by MGX1016 View Post
See if you can get a cheap board on eBay, otherwise yes check the cable... Doubt it though
Ill look into it but it seem most are over $70 bucks. I took the think apart and ran a little experiment. There are two cables one that is for the CCFL and webcam/mic and other is the direct VGA equivalent cable. I unplugged the ccfl/mic cable and just had the vga cable plugged in. I booted up the pc and the backlight still went one but was just as dim. So how the hell does this work is the second cable to provide power for the inverter only when its on battery ? (battery was out when i did this experiment)
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post #9 of 31
Usually there are 3 types coming from LCD, ccfl/video , webcam , wifi

Ccfl runs on video cable

Are there any LCD that uses led conversion ? It allows led LCD to run on ccfl style laptop
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post #10 of 31
Thread Starter 
I still haven't figured out the issue, and decided to revist this laptop. since the last post I have tried to replace the following; lcd, lcd inverter, lcd video cable, lcd inverter power cable.

Now recently, I had bought a motherboard of the same kind (intel GPU vs the discreet nvida GPU).

The seller was selling them as "refurbushed" I replaced the motherboard and still booted up with a dim display in windows as well as bios. So I sent back the motherboard but.

So my question to you guess is, would a crippled cpu or ram module be able to cause this dim display problem ?
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