Who knows about laptop LCDs?

Jeffbx · 08-20-2004, 10:44 AM

So I have a couple of Thinkpad T21s, and both exhibit the same behavior - I turn them on, and the LCD has a faint pink hue to it. You can't see any white at all, and all other colors have a bit of a pinkish tint. After the machine is on for a while, the pink goes away & everything is fine. If I connect to an external monitor, everthing looks fine, even when the LCD is pink.

Anyone know what causes this? Bad inverter? Backlight problem? Loose connection?

Thanks!

seqiro · 08-20-2004, 11:24 AM

My guess would be that it has something to do with the fluorescent tube for the backlight.

Jeffbx · 08-22-2004, 07:55 AM

Thanks Seqiro.... anyone else wanna throw in an opinion? I keep seeing conflicting info on whether this is an inverter issue or a backlight issue, and I'd like to know for sure before I start buying parts.

Devhux · 08-22-2004, 08:46 PM

I wouldn't think the inverter would cause that if the problem heals over time. Then again, I have seen where heat can "repair" strange glitches like this before (had it happen with a motherboard that had a slight crack in it -- system was unstable for the first 30 minutes, then it was fine).

Hard to really say overall - though my first guess would be something wonky with the backlight.

Cheesypuff · 08-22-2004, 09:01 PM

My guess is a loose connection! My parents lappy lcd turned blue...and all it was, was a loose connection. That could be it. If you don't mind voiding the warrenty, I'd just check if it's the connection.

I voided my parents...and it works find

good thing that lappy has worked far beyond the warrenty date!! phew!

Jeffbx · 08-23-2004, 05:18 AM

Quote:

Originally Posted by Cheesypuff

My guess is a loose connection! My parents lappy lcd turned blue...and all it was, was a loose connection. That could be it. If you don't mind voiding the warrenty, I'd just check if it's the connection.

Hahaha! If it was still under warranty, I wouldn't be worrying about fixing it myself!

Thanks for the tip tho.... maybe I'll tear it apart & have a look before I order any parts.

brainsmile · 08-23-2004, 07:55 AM

on a side note... how do you dismantle a laptop and is it easy to do? Sites with instructions?

Jeffbx · 08-23-2004, 10:04 AM

Fortunately, IBM is pretty good about their publications, if you can find where they're buried on IBM.com.

http://www-307.ibm.com/pc/support/si...id=MIGR-4UYM3F

08-20-2004, 10:44 AM	#1
Jeffbx Fleet Admiral Join Date: Mar 2000 Location: Michigan Posts: 9,390	Who knows about laptop LCDs? So I have a couple of Thinkpad T21s, and both exhibit the same behavior - I turn them on, and the LCD has a faint pink hue to it. You can't see any white at all, and all other colors have a bit of a pinkish tint. After the machine is on for a while, the pink goes away & everything is fine. If I connect to an external monitor, everthing looks fine, even when the LCD is pink. Anyone know what causes this? Bad inverter? Backlight problem? Loose connection? Thanks!

08-20-2004, 11:24 AM	#2
seqiro Commander Join Date: Mar 2002 Location: Western MA Posts: 1,183	My guess would be that it has something to do with the fluorescent tube for the backlight. __________________ Paul Beasi

08-22-2004, 09:01 PM	#5
Cheesypuff Vice Admiral Join Date: Dec 2000 Location: Cali, but missing Hong Kong and Texas Posts: 4,782	My guess is a loose connection! My parents lappy lcd turned blue...and all it was, was a loose connection. That could be it. If you don't mind voiding the warrenty, I'd just check if it's the connection. I voided my parents...and it works find good thing that lappy has worked far beyond the warrenty date!! phew! __________________ Life is like toilet paper, long and useful! The stars at night, are big and bright clap 4x deep in the heart of TEXAS!

08-23-2004, 07:55 AM	#7
brainsmile Chief of Naval Operations Join Date: Jun 2000 Location: woah... why is welfareloser here with me so early in the morning and more importantly why am I wearing her clothes?!? Posts: 13,754	on a side note... how do you dismantle a laptop and is it easy to do? Sites with instructions? __________________ ********************************** DCM #1 (Founder) "Nobody beats Vitus Gerulaitis 18 times in a row." - Vitus Gerulaitis on beating Jimmy Connors after 17 failed attempts.

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08-22-2004, 07:55 AM	#3
Jeffbx Fleet Admiral Join Date: Mar 2000 Location: Michigan Posts: 9,390	Thanks Seqiro.... anyone else wanna throw in an opinion? I keep seeing conflicting info on whether this is an inverter issue or a backlight issue, and I'd like to know for sure before I start buying parts.

08-22-2004, 08:46 PM	#4
Devhux Rear Admiral Lower Half Join Date: Feb 2001 Location: Calgary Alberta Canada Posts: 2,511	I wouldn't think the inverter would cause that if the problem heals over time. Then again, I have seen where heat can "repair" strange glitches like this before (had it happen with a motherboard that had a slight crack in it -- system was unstable for the first 30 minutes, then it was fine). Hard to really say overall - though my first guess would be something wonky with the backlight.

08-23-2004, 10:04 AM	#8
Jeffbx Fleet Admiral Join Date: Mar 2000 Location: Michigan Posts: 9,390	Fortunately, IBM is pretty good about their publications, if you can find where they're buried on IBM.com. http://www-307.ibm.com/pc/support/si...id=MIGR-4UYM3F

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