Comments on: How to test LCD screen inverter in a laptop

By: dsi r4

dsi r4 — Fri, 20 Nov 2009 09:30:23 +0000

Be for this post i have no idea regarding how to open LCD screen and make repairing of LCD screen .You provide very nice information and fantastic things.I am really glad about this.

By: Duane

Duane — Sat, 14 Nov 2009 18:13:36 +0000

Sweet! I went ahead and tried again and got to all the wires. Disconnected the wires and made sure the monitor cable was connected firmly, and now it finally works again.

Thank you~

By: cj2600

cj2600 — Sat, 14 Nov 2009 00:36:51 +0000

Duane,

I took the laptop apart, but I just couldn’t figure out how to get the monitor off so I could take the bevel off it.

You’ll find my laptop disassembly instructions at http://www.irisvista.com
You can use instructions for a Satellite A215, it’s similar or at least very close to Satellite A205.

TodayI decided to break it out again to use with an external monitor. But this time I noticed if I pulled the monitor from the top forward (i.e. I pull it as I might close the laptop, But only pull enough until I lose the “slack”) I was able to see the monitor display without the back light. Once I let go, the image disappears. Then if it’s played around with in some other random fashion, I can get the display and back light to work.

Could be bad connection between the video cable and motherboard. Try reconnecting the cable.
Also, could be defective video cable.

By: cj2600

cj2600 — Sat, 14 Nov 2009 00:06:46 +0000

Tamal,

My notebook Samsung R50 has its some left portion of it more darker than the rest of the LCD screen. And overall I have also noticed that my 3 year old this notebook of mine had its overall brightness reduced.
My question is: is it the CCFL needs to be replaced or is it the inverter gone bad?

It’s hard to tell without testing the laptop with known good spare parts, but I think this is related to the CCFL.
From my experience, when inverter fails the entire screen goes dark.

The inverter either works and provides power to the backlight lamp, or doesn’t work and the backlight gets no power at all.

I think the backlight lamp goes bad.

By: Duane

Duane — Fri, 13 Nov 2009 23:00:40 +0000

I was given a laptop to check out since the monitor was not working. A month ago I concluded the monitor was just shot and needed to be replaced as I was able to get video to an external monitor but got no image on the LCD at all.

TodayI decided to break it out again to use with an external monitor. But this time I noticed if I pulled the monitor from the top forward (i.e. I pull it as I might close the laptop, But only pull enough until I lose the “slack”) I was able to see the monitor display without the back light. Once I let go, the image disappears. Then if it’s played around with in some other random fashion, I can get the display and back light to work.

I am wrong to assume that I may just have a wire problem and not an inverter or backlight issue? I took the laptop apart, but I just couldn’t figure out how to get the monitor off so I could take the bevel off it.

Laptop is a Toshiba A205-S5871.

By: Tamal

Tamal — Fri, 13 Nov 2009 11:02:47 +0000

Hello. My notebook Samsung R50 has its some left portion of it more darker than the rest of the LCD screen. And overall I have also noticed that my 3 year old this notebook of mine had its overall brightness reduced.
My question is: is it the CCFL needs to be replaced or is it the inverter gone bad?

By: cj2600

cj2600 — Fri, 06 Nov 2009 18:32:39 +0000

faysal,

i want to ask that this keys are not working because of new inverter?

I don’t think so. If the screen lights up the inverter is working properly.
I guess you are missing a piece of software controlling the Fn key.

By: faysal

faysal — Fri, 06 Nov 2009 04:17:21 +0000

Thanks,

No im not installing factory drivers i have to find out then istall all
i want to ask that this keys are not working because of new invertor ? or some driver problem ok first i intalled drivers then lets see it is enable or not.

Thanks a lot again
Faysal

By: sanjay dey

sanjay dey — Thu, 05 Nov 2009 20:04:46 +0000

Boss,
from where i can get the company service manuals and repairing guide with flow chart for laptops of all brands, pls help me

By: cj2600

cj2600 — Thu, 05 Nov 2009 19:34:29 +0000

faysal,

Hi i am facing a problem i installed new invertor in my dell laptop decause of old one is not working but my display keys function i,e Fn + Arrow keys not working i also fomate my hard disk with new partition installed Windows Xp.
Pease help me how i can enable Fn keys funtions.

I’m not sure why the Fn key doesn’t work. Did you reinstall all factory drivers and software after installing XP? You can install it from the CD or download from Dell website.