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| Laptop LCD not working, external works
Posted: 3/12/2008 7:06:29 PM | Recently added a Samsung 22” LCD to my laptop via DVI cable
Now I can’t tell if the laptop LCD is blown or not, when I unhook the Samsung
1. Laptop LCD is not totally black as it would be if it’s powered down – like a deep midnight glow as if there is some minimal backlighting happening.
2. Reboot on laptop only, still no display
3. Try to get into BIOS, but again can’t tell, as nothing appears on the laptop LCD, just the very dark blue, almost black
4. Hookup Samsung all ok, but I’m assuming I can’t get into BIOS when it’s hooked up the since drivers wouldn’t be loaded for the Sammy to be recognized (correct assumption?)
5.When I’m on the Sammy, and I look at the display settings,
a. Monitor 1 icon
i. is identified as the #1 monitor and primary
ii. use this device is checked and grayed out
iii. extend my windows desktop onto this monitor checked and also grayed out
iv. screen resolution is set to the monitors native maximum ok
b. Monitor 2 icon
i. when you roll the mouse over it, it shows as “not active”
ii. use this device is not checked and grayed out
iii. extend my windows desktop onto this monitor not checked and available
iv. screen resolution shows only 1024 by 768 max which is odd, I know it can go to 1900x whatever
v. If I make any changes to those setting and apply, they revert back,
6. When I click on the advanced properties of both, all is ok and working properly – according to what I see
Big Question
Is my laptop LCD blown, given that i can't get into BIOS or at least can't see that i am? or is there some damn setting that I’m missing?
FYI
I'm not wishing to use both monitors for the same desktop, i.e. drag mouse from one monitor desktop to the other in a dual setup.
I've only had the 2nd monitor hooked up for a month, and when i got that working I never checked to see that the LCD still was, I would just hibernate or standby with the Laptop always closed! so, sorry I can't tell you if it was working after the hookup.
thanks | |
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| Laptop LCD not working, external works
Posted: 3/12/2008 7:52:21 PM | | The LCD is probably OK since you can see the indications of a picture, but only dark. Depending on the age of the laptop, the Inverter that powers the backlight may be defective or it may simply be a loose connection. If you're able to disassemble the display bracket enough to get at the Inverter, check to see if the connections are tight. The Inverter looks like a long rectangular circuit board and most likely has connectors on each end. Don't know if that helps, Trap. | |
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| Laptop LCD not working, external works
Posted: 3/12/2008 8:24:20 PM | well, there really isn't ANY image, just an even one or two shades less than black - and yes, that could be it - i tried to snap off the cover along the back of the keyboard several times, but only managed to pry it up 3 inches, feared it was going to literally snap in two ... may have to take it in to check if that's the case unless there's something I've missed! - but thanks! it confirms the one suspicion - 2 year old ...
only $499 to replace the panel ....  yeah right! | |
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| Laptop LCD not working, external works
Posted: 3/12/2008 9:17:19 PM | There's a small chance the cable connecting the LCD to the Motherboard is loose or shot. Also a small chance that its the inverter board as someone mentioned above. Most likely you've got a blown LCD though.
Check eBay for a good new/used LCD. Probably a lot cheaper than $499.
I doubt this will be it, but there's one last thing you can try. There should be a key that you use the Fn (Function) key with to change between the laptop's LCD and the external monitor.
It will either look like this:
http://www1.umn.edu/vns/images/vns/conferencing/scando04.jpg
or this (the image on the f7 key, its hard to see):
http://www.carthage.edu/ais/media/images/hands.JPG | |
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| Laptop LCD not working, external works
Posted: 3/12/2008 10:47:02 PM | 2 year old ...
only $499 to replace the panel
LCDs are usually rather expensive to replace ... that's why it wouldn't be my first choice at replacement during troubleshooting. An Inverter is much cheaper and physically easier to replace than the entire LCD panel. The fact that the laptop is only 2 years old would indicate some form of manufacturer's defect in a component. Since an Inverter uses high voltages due to the nature of its function, a defect could render it unusable in short order. Maybe you can get a free one (to try out) from the manufacturer under warranty. That would eliminate one source of failure.
As Msg4 said, it's a good idea to check the data cable from the mother board to the LCD ... and indeed, check for any obvious loose connections before replacing components. | |
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