• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 526
  • Last Modified:

How to determine laptop problem based on symptoms?

My laptop powers on but the color of the screen appears abnormal ie. like burning light, too bright. Boots up to login screen.(Sometimes only half-way to Windows logo.) Suddenly, it goes blank black. The power is still on with the  green leds still solid. I can not run any test modules because the screen goes black. Usually I could switch screen to external monitor. But now, it won't switch.
What do these symptoms tell us about the problem?
0
reyr
Asked:
reyr
  • 12
  • 6
  • 3
  • +3
2 Solutions
 
Glen KnightCommented:
Could be one of the following:

> Video Card/Chipset malfunction
> Video Interface (for external connector & internal)

If it's happening before any drivers are loaded then you can rule out drivers

The fact you used to be able to attach an external monitor but now can't does seem to point to the interface card/chipset.

Unless you have been unlucky and both your internal display and external monitors have failed I would say it was the laptop hardware at fault.
0
 
greg_vanderCommented:
seems to be graphic card related.
to see if it comes from drivers you can use a live CD (ie knoppix)
0
 
reyrAuthor Commented:
just now i connected a desktop to the external monitor that does not work with laptop.it works. now i moved the connection to my laptop. this time my laptop switched to external monitor without any problem. this time perhaps it could not be the video/graphics of the laptop, could it be or anything else?
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
reyrAuthor Commented:
defintely this points to the laptop integrated monitor. why does it drop display and turns black? Considering that when it boots up the color interchange between burning bright and normal,  could it be the bulb of the screen?
0
 
greg_vanderCommented:
It could be due to the screen resolution. if too hight for your screen it could switch automatically to external. let the ext monitor plugged to see the whole boot or put the resolution at minimum (VGA) to see if it's normal.
the bulb just lights the lcd so if defects you should see your desktop, but very very dark.
0
 
senadCommented:
'What do these symptoms tell us about the problem?' - it's time to get a new laptop !
0
 
Anyone3003Commented:
in my opinion this is  display problem if the laptop works with a external monitor and not it's integrated one the laptop needs to replace it's display or the internal cable linking the integrated display and the vga gone bad  and that's why the external monitor works but not the integrated monitor but most likely  that is a integrated monitor problem and it needs to be replaced  with a new one or fixing it the repair shop will tell u that
0
 
reyrAuthor Commented:
The display screen has an interchange of burning orange color or any abnormal color of that type AND normal color as it navigates the window xp boot-up process. Based on your experience or expertise which specific part of the display is damaged or adversely affected ie: backlight, display controllit shows some color abnormality.
0
 
reyrAuthor Commented:
... display controller card. I'm intending to replace any part of the display if I could determine which is which is damaged.
0
 
greg_vanderCommented:
seems to be your graphic card that is failing.
0
 
Glen KnightCommented:
I am sure that's what i said in my first post?
0
 
reyrAuthor Commented:
Can't be  the graphics card because as I said it works with an external monitor.
0
 
reyrAuthor Commented:
... the gpu is working.
0
 
Glen KnightCommented:
You said that it was no longer working with an external monitor?
0
 
reyrAuthor Commented:
... in the comments scripts above I wrote:
"now i moved the connection to my laptop. this time my laptop switched to external monitor without any problem. " 
0
 
greg_vanderCommented:
so it should be the cable from the GPU to the LCD, try to reseat it.
0
 
reyrAuthor Commented:
.. Greg, I will do that and get back to you.
0
 
MarkCommented:
When the LCD goes black can you discern, by using a bright flashlight, if the desktop  can be seen. I usually look for the start button in the left lower corner or the clock in the right lower.
If you can see something of the desktop when it blacks out then the LCD is working.
The bright screen and the black out may be an inverter problem. The Inverter powers the CCFL lighting for the LCD screen and may be on it's last legs.
Check this link for more info.
http://bootmylaptop.com/laptop-with-a-bad-lcd-inverter/
0
 
reyrAuthor Commented:
Hi Greg,  this is a laptop. There is no cable from gpu to lcd. GPU is integrated chip embedded in the motherboard.
0
 
reyrAuthor Commented:
Hi sparkmaker, when the lcd totally shuts out, there is nothing that I can see. Just the leds of the powera and other components being solid green. I considered that too but: inverter, which controls the lcd bulb or backlight. But, please zoom in more on the inverter probability.
0
 
greg_vanderCommented:
you're wrong, these cables are very thin, inside the cover, and goes close to the hinges and along the back of the lcd pannel. sometimes they are a little bit cutted, so it can produce these effects.
0
 
reyrAuthor Commented:
Hi Greg, perhaps we're talking about oranges and apples here. I am talking about GPU=graphics processing unit. http://en.wikipedia.org/wiki/File:6600GT_GPU.jpg. You might be referring to an inverter or anything else. In any case, you're  entitled to your opinion and I respect that. Thanks.
0
 
greg_vanderCommented:
hi,

there is also a cable connected to the inverter, but i'm talking about this kind of cables, connected to the motherboard.
http://www.oldvcr.tv/projects/files/Paul-20-LVDS-Wiring.jpg
0
 
MarkCommented:
It is difficult to see anything on a blacked out screen but if you shine a bright flashlight at the right angle and do see the desktop then it would be the inverter. Doing it in a dark room is helpful.
When an LCD gets power to the inverter but no video signal the screen should be totally lit white. You situation of a black screen with no discernible desktop but with external monitor running suggests there is an issue with the LCD cable as this carries both power for the inverter as well as video signal. The other possibility is a mother board issue at the connection point for the lcd cable, either needs to be reseated if loose or its a broken electrical trace on the motherboard that would require replacement of the motherboard
0
 
reyrAuthor Commented:
replaced motherboard. now, it's working.
0

Featured Post

Vote for the Most Valuable Expert

It’s time to recognize experts that go above and beyond with helpful solutions and engagement on site. Choose from the top experts in the Hall of Fame or on the right rail of your favorite topic page. Look for the blue “Nominate” button on their profile to vote.

  • 12
  • 6
  • 3
  • +3
Tackle projects and never again get stuck behind a technical roadblock.
Join Now