[ltp] T23 and eye strain

[linux-thinkpad@linux-thinkpad.org]

---- Frank Dekervel <frank.dekervel@smartlounge.be> wrote: 
> Hello,
> 
> > I can confirm this - I have a T42 where the display backlight has started to
> > exhibit a strong red tint and has significantly lost brightness. The tint
> > disappears after a certain "warm-up" time, but the display is still very dim.
> >   
> I had the same problem on my old R51. I scanned the mail archives of 
> this list, and someone on this list had replaced the backlight of his 
> LCD. He mentioned the site.
> 
> I have ordered a replacement backlight for my R51 for around 10 euro (a 
> very narrow fragile tube) and replaced it myself. It turned out that 
> once you have the right manuals (search for <your model> hardware 
> maintenance manual on google), it is not too difficult (you need some 
> basic soldering too).
> 
> After replacing my backlight (took me more than 4 hours, mostly due to 
> being not very handy, i think if you are used to it you can do it in 1.5 
> hour), no more red tint, and back to the original brightness.
> 
> 2 months after i made the replacement, the backlight died (when i open 
> the laptop, the backlight works for 1 second, then i hear a loud hiss, 
This sounds like an inverter problem.
Remember that the inverter and the cable that supplies power to the
inverter can also cause backllight problems.
> then it stops working). probably i didn't do the soldering very well. I 
> have another backlight (i ordered 2) so i might try again :)
> 
> i think the vendor was this: 
> http://www.lcdpart.com/doc/ccflinstallation.html
> 
> greetings,
> Frank
> 
> 
> >> So, probably you're suffering just from degraded brightness / contrast. The
> >> timescales for this are 2-3 years or so (for example, I could easily use my
> >> X40 outside when it was new and now this is no-way on a sunny day).
> >>     
> >
> > Same here - this laptop is now 4 years old. Not sure if it's worth trying to
> > replace the backlight itself...
> >
> > Bye,
> > 	LenZ
> >   
>