Forum Thread

White blank screen on Dell Vostro 1500 laptop

teetee1 1,973 918 September 9, 2011 at 05:00 PM
So one of my colleagues asked me if I can repair her laptop. The problem of the machine is it only shows white blank screen when turned on. The external monitor works when connected and the system runs fine. She's been using the computer with the external monitor.

As long as the machine is on, the screen is white.

Multiple forum discussions suggests it's the not the LCD panel itself, VGA chip, or power adapter. It's the LCD cable got broken or needs to be reseated because it doesn't make good contact.

If anyone had the same problem with your laptop (maybe the same problem happens to not only this model) could you share what the cause was and how did you get it fixed? Thanks! I am trying to collect as much info as possible before I open it up.

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1

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#2
http://slickdeals.net/forums/showthread.php?sduid=1479530&t=3275310

What I just did. I saw some reports with only the white screen problem, that it sometimes didn't do it when the power adapter was plugged in.


some info in here
http://en.community.dell.com/supp...ageIndex=1
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Last edited by rancher1 September 9, 2011 at 07:17 PM
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#3
Quote from rancher1 View Post :
http://slickdeals.net/forums/showthread.php?sduid=1479530&t=3275310

What I just did. I saw some reports with only the white screen problem, that it sometimes didn't do it when the power adapter was plugged in.


some info in here
http://en.community.dell.com/supp...ageIndex=1

Thanks for the useful info! So do you think your white screen w/ vertical line issue was caused by LCD instead of the cable? I think I narrow it down to three component: 1. LCD 2. LCD cable, 3. power. and I was surprised that this time the motherboard/video chip wasn't involved lol.


I already told the user of the laptop that she is going to need a LCD replacement and I will find her one on ebay. I guess I will also order the LCD cable too. During troubleshooting I tried press different area of the casing cover, lid cover, and change the screen angle but all I could see is white screen. The computer runs normally on external monitor but it's just white on the laptop screen all the way.
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#4
most likely its a loose LCD cable resulting from being rough opening and closing the laptop.
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#5
It could -just- be the cable. I was hoping for that in my case, save them some money. I ordered the cable first, waited for that, then had it on hand in case the old one was just loose. When I found out it wasn't the cable, I then ordered the screen. They weren't in a hurry, so it worked out that way. In your case, it could be either as well, could start with the cable, and maybe not need the screen. Can't say without just swapping things around. That's the problem with laptops and troubleshooting, when a person can't have supplies on hand to try things out. If you order the screen right away, you risk being stuck with it, if it turns out to be just the cable.

I don't know where they get the % numbers here, but more info.
http://www.laptoptips.ca/hardware/lcd-failures/
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#6
The 1500 was notorious for video card problems. I had a 1500 when they first came out and after about a year and several service calls, Dell replaced it with a 1510.

The fact that you get good external video means the video adapter itself is likely not the problem (likely but not definitely). As the posters before me have said, it is impossible to diagnose without part on hand. In addition to the LCD and the cable, it could be the inverter.

I do not know how comfortable you are opening the laptop, but you can get a new cable and a new inverter on ebay for a shipped total of well under $20. Start with those since the risk/reward ratio is low.
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#7
If you are getting a full white screen, it's just a connector issue, whether it's the inverter or the cable, I cannot tell say without testing. But I think everyone above just said the same thing I just did. I've fixed about 50 Dell's with the same problem. I just replaced the entire inverter and cable since I ordered them in pairs for all of them.

LCD problems usually give off no display at all or have a purple/cracked screen (physical damage). Sign the LCD is fine is that it give off WHITE! Angels.
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Last edited by gumiho September 15, 2011 at 01:46 PM
#8
Take it apart and remove then reseat the video cable in the connector. Usually fixes the issue.
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#9
Here is the follow up.

I am actually glad that I didn't purchase anything (cables, new LCD, etc). I removed the panel and the keyboard and found burn marks near the LCD cable connector socket on the motherboard (pls see the attache photos).

The owner the laptop had no clue why the laptop screen shows all white but my guess is there was liquid damage (see the last photo) and caused the short circuit or blown something. It totally destroyed the LCD cable connector and I am not sure if the board can still be used.

Anyway thanks for all the suggestions. I am just going to wait for the owner's decision since the cost for the board/cable replacement and my labor will probably be the motivation for her to get another laptop.
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Last edited by teetee1 September 20, 2011 at 08:32 PM
#10
I'm not sure if what I'm seeing in the pics -- the blur in certain areas -- is from a flash or if it's corrosion. I see in the last pic what appears to be moisture along one side, but it is in an area that I wouldn't consider to be part of the motherboard -- perhaps above it and in part of the housing.

I see no pics of the caps on the board itself. So I can't tell if there are bad caps or moisture damage to the board.

Just for grins, remove and reseat the video cable and see if you get a picture. The white screen issue on many of the laptops is due to the cable being partially unseated due to the action of the hinge where a user opens and closes the laptop tons of times over a period of a year or more. Opening and closing the lid causes a slight pull on the cable and it can come a little bit unseated. Completely removing it from that connection and reseating it again can fix the issue without replacing anything, in many instances.

Won't cost you or the user anything to unseat it completely and reseat it.
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Last edited by callpocket September 21, 2011 at 07:49 PM
#11
Also, one I worked on last week, the video cable itself was bad and damaged in the area of the hinge. Replacing the video cable fixed it.
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