Laptop LCD backlight repair

[Tim Mitchell]

I'm trying to repair the backlight of a Compaq Armada 1750. Having
extracted the LCD panel from the case, the backlight tube seems to be
integral with the LCD panel. Does anyone know
(a) if it's possible to get a complete replacement panel any more (we're
in the UK so preferably from Europe - searched the web with no result)
(b) if it's possible to get the backlight tube out of the panel to
replace it.

The inverter is working properly and outputting KV's (nice corona
discharge to my meter probe!)
The machine is getting a bit old, if DIY repair fails it will be cheaper
to get a new one, so it's a case of "fix or bin".

 

[Ian Stirling]

I'm trying to repair the backlight of a Compaq Armada 1750. Having
extracted the LCD panel from the case, the backlight tube seems to be
integral with the LCD panel. Does anyone know
(a) if it's possible to get a complete replacement panel any more (we're
in the UK so preferably from Europe - searched the web with no result)

It may be, however they are very expensive typically.
I don't know how recent the 1750 is.

(b) if it's possible to get the backlight tube out of the panel to
replace it.

I have dissasembled several panels to the point that I would have been
able to replace the backlight if I wished.
Generally it involves lots of fiddly screws.
A digital camera/video camera is handy to record what went where.

The inverter is working properly and outputting KV's (nice corona
discharge to my meter probe!)
The machine is getting a bit old, if DIY repair fails it will be cheaper
to get a new one, so it's a case of "fix or bin".

Fix or ebay also works.
If someone has spilt something in theirs, they may need a new lower half.

 

[Tim Mitchell]

It may be, however they are very expensive typically.
I don't know how recent the 1750 is.


I have dissasembled several panels to the point that I would have been
able to replace the backlight if I wished.
Generally it involves lots of fiddly screws.
A digital camera/video camera is handy to record what went where.



Fix or ebay also works.
If someone has spilt something in theirs, they may need a new lower half.

Worth a try. The 1750 model is about 4 years old, we bought it 2nd hand
about 2 years ago.

 

[Tim Mitchell]

I have eventually managed to extract the backlight tube, it is 2mm dia
295mm long, but now I can't find anywhere which supplies one that long.
Any ideas? The display is a Samsung LT141X5-124.

 

[Jeff Liebermann]

I have eventually managed to extract the backlight tube, it is 2mm dia
295mm long, but now I can't find anywhere which supplies one that long.
Any ideas? The display is a Samsung LT141X5-124.

Just do a Google search for "Cold Cathode Fluorescent Lamp" (CCFL).
The same tubes are used to light up the computer cases favoured by
gamers and overclockers. The trick will be finding one that's the
correct size as the advertisements rarely offer dimensions. For
example:
http://www.tigerdirect.com/applicat...ls.asp?EdpNo=579297&Sku=U10-6000 WH&CatId=882