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From: emmasb on 21 Oct 2009 16:53

Hi

I think my backlight has gone/is going on my laptop. The screen is pink
on boot up and then fades to black very quickly.

I have changed the inverter but it made no difference
checked it works ok with external moniter
checked the hibernate button isn't stuck
checked connections

So I think it must be the back light itself, I don't quite know where
it is though, looked into the screen and there is a taped wire? going
across the screen but nothing that looks like a tube..

So

Can anyone tell me how i get to it on my laptop?
Is it something I can replace myself or do I need a complete lcd screen
- really hoping not as I don't have the money for that!

Thanks for any help you can give me..
Emma


From: BillW50 on 21 Oct 2009 18:31
In news:emmasb.40fev2(a)no.email.invalid,
emmasb typed on Wed, 21 Oct 2009 15:53:49 -0500:
> Hi
>
> I think my backlight has gone/is going on my laptop. The screen is
> pink on boot up and then fades to black very quickly.
>
> I have changed the inverter but it made no difference
> checked it works ok with external moniter
> checked the hibernate button isn't stuck
> checked connections
>
> So I think it must be the back light itself, I don't quite know where
> it is though, looked into the screen and there is a taped wire? going
> across the screen but nothing that looks like a tube..
>
> So
>
> Can anyone tell me how i get to it on my laptop?
> Is it something I can replace myself or do I need a complete lcd
> screen - really hoping not as I don't have the money for that!
>
> Thanks for any help you can give me..
> Emma

Sure sounds like the florescent lamp, since you already changed the
inverter. And you checked the cables and it doesn't sound like the lid
switch.

The good news is the lamp is replaceable and you can buy them for 40
bucks or less. The two thicker wires from the inverter going to the LCD
are the wires going to the lamp. You probably have to partly disassemble
the LCD screen to get to it.

--
Bill
Asus EEE PC 701G4 ~ 2GB RAM ~ 16GB-SDHC
Windows XP SP2


From: davy on 21 Oct 2009 19:05

Yep sounds like the CCFLs (Cold Cathode Flourescent Lamps). Does this
help? 'Backlight Repair Guide'
(http://www.dnd.utwente.nl/%7Egrit/backlight/ccft.html)... and to your
particular machine 'have a look here.'
(http://repair4laptop.org/notebook.html)

You do need to be very careful they are about the thickness of a
knitting needle and are very fragile, they will take no stress what so
ever.

They are powered from an DC to DC inverter that transforms the battery
voltage up to around 1,400V when running.... these do fail as well
giving various symptoms, but I'd go for the lights.

davy


From: emmasb on 22 Oct 2009 03:21

Much appreciated, the 'how to...' link looks really good, I will give it
a go and report back.

Thanks again

Emma


From: Barry Watzman on 22 Oct 2009 08:50
It is actually INSIDE the panel itself.

This is not normally a "do it yourself" project, although it depends on
how the LCD panel is constructed (a few of them can be changed without
too much difficulty; most can't).

However, there are places that will change the backlight (the total
cost, including the lamp and the labor, is usually about $100). You may
be able to find an entire replacement panel for about the same amount.


emmasb wrote:
> Hi
>
> I think my backlight has gone/is going on my laptop. The screen is pink
> on boot up and then fades to black very quickly.
>
> I have changed the inverter but it made no difference
> checked it works ok with external moniter
> checked the hibernate button isn't stuck
> checked connections
>
> So I think it must be the back light itself, I don't quite know where
> it is though, looked into the screen and there is a taped wire? going
> across the screen but nothing that looks like a tube..
>
> So
>
> Can anyone tell me how i get to it on my laptop?
> Is it something I can replace myself or do I need a complete lcd screen
> - really hoping not as I don't have the money for that!
>
> Thanks for any help you can give me..
> Emma
>
>
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