Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

My laptop screen flickers and goes black. I can hear start up music in the background so i know there is something wrong with the display. I am confused if i should try to replace LCD Inverter or Backlight?

Any idea on this will be highly appreciated.

share|improve this question

migrated from stackoverflow.com Feb 23 '11 at 0:59

This question came from our site for professional and enthusiast programmers.

1  
Welcome to SO. This community is a place to answer programming questions. –  Kirk Woll Feb 22 '11 at 18:37
    
@Kirk: I agree, you have the rep to move it to Super User? –  servermanfail Feb 22 '11 at 18:40
    
sorry abt that. –  Asdfg Feb 22 '11 at 18:47
add comment

1 Answer

Shine a torch on the black screen, and get someone with VERY good eyesight to see if they can see anything on the screen. It will be REALLY dark and hard to see the image, but it's it's there, then it's your LCD Backlight Inverter, a very typical malfunction. They are $20+ to buy, and takes an hour or so of semi-skilled electronics engineering to perform. Danger: you are dealing with 10,000v and could threaten life. Pay $60 for a shop to replace the inverter.

share|improve this answer
    
10,000v? I think if i un-plug the laptop and remove the battery before replacing the interter, there will be no power. Isnt it? –  Asdfg Feb 22 '11 at 18:46
    
Not necessarily. Capacitors can hold a charge for a very long time. Also, if you cannot see the image with a bright flashlight, the problem could be the panel itself, or a bad video card. –  Fopedush Apr 10 '11 at 3:46
    
I have never heard that the inverter in an LCD display could be dangerous. Do you have a citation for this assertion? Voltage of 10,000V alone is not an indication of danger. 10,000V is less than what you typically generate with static electricity. –  Bacon Bits Apr 10 '11 at 4:09
    
10,000 volts??? seriously? that is the about what you see on low level power lines, not LCD inverters. An LCD inverter will have about 500-700 v AC output at most, which is still a lot, but considering the amperage would be fairly low, it would definitely not be life threatening, but could give a bit of a shock if you aren't careful. Now if the amperage were equally as high, you'd have to worry, but with so little juice going through that, the difference in force of the electrons makes little difference. As an example, police tasers give out about 1,200 volts, but the amperage is minimal. –  MaQleod Apr 10 '11 at 4:22
    
Not life threatening but may give you a short jolt similar to what you get from static off your car. 10000V perhaps, but very very low current. –  Matt H Jan 11 '13 at 2:40
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.