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 Post subject: T43 LCD help
PostPosted: Mon Jun 18, 2012 8:11 pm 
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Joined: Sun Jun 17, 2012 10:51 pm
Posts: 14
Location: Summit Hill, PA
I have a T43 that has no display, but I can see the faint icons on my desktop. It boots up perfectly, and this has been one of the best T43's up to now. I have fixed LCD problems in the past, but this situation stumps me a bit. I took a perfectly working LCD off my other T43 and hooked it up to this T43 with no change in display. I was thinking that it rules out anything to do with the LCD or even the ribbon/cable going to the motherboard, since each LCD has its own cable.

However, when I hook up my T43 to another monitor, it works perfect. That is why I'm stumped. Any ideas?

Thanks


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 Post subject: Re: T43 LCD help
PostPosted: Mon Jun 18, 2012 8:52 pm 
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Senior ThinkPadder
Senior ThinkPadder

Joined: Sun Feb 25, 2007 11:28 am
Posts: 12690
Location: Albrightsville, Pennsylvania
Welcome to the forum!

Sounds to me like you have a blown fuse on the board, one of those that control the output to the LCD.

The reason why you have no problems with the external monitor is that there are two separate outputs for the VGA and LCD, and one can work perfectly well while the other one is shot.

More info on fuse locations and related stuff here:

http://nickpaton.fireflyinternet.co.uk/ ... 0links.pdf

_________________
...Knowledge is a deadly friend when no one sets the rules...(King Crimson)

Cheers,

George (your grouchy retired FlexView farmer)

Running Linux while collecting SSDI: A31p, T42p

Abused daily: R60F, R500F, T60, T61, T410

For sale: T601 QXGA FrankenPad


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 Post subject: Re: T43 LCD help
PostPosted: Mon Jun 18, 2012 9:34 pm 
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Joined: Sun Jun 17, 2012 10:51 pm
Posts: 14
Location: Summit Hill, PA
Thanks for the warm welcome. Yeah, I saw that diagram before but always thought that the odds of a blown fuse were pretty slim. Perhaps I better think again :-)

One more piece of info: Just the other day, I moved the screen back and forth and then pressed FN & F3, and the screen came on. When I restarted it, it was black again. Haven't been able to get the display alive since. Do you still think it's the fuse? I guess the solder joint of the fuse could be loose and the opening and closing of the screen just shifted things around a bit to make it come on????


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 Post subject: Re: T43 LCD help
PostPosted: Mon Jun 18, 2012 9:36 pm 
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Senior ThinkPadder
Senior ThinkPadder

Joined: Sun Feb 25, 2007 11:28 am
Posts: 12690
Location: Albrightsville, Pennsylvania
You might have a dirty or defective connector on the motherboard itself. If the fuse is indeed blown, Fn+F3 will do nothing.

What's the 7-character model number of that T43?

_________________
...Knowledge is a deadly friend when no one sets the rules...(King Crimson)

Cheers,

George (your grouchy retired FlexView farmer)

Running Linux while collecting SSDI: A31p, T42p

Abused daily: R60F, R500F, T60, T61, T410

For sale: T601 QXGA FrankenPad


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 Post subject: Re: T43 LCD help
PostPosted: Mon Jun 18, 2012 9:58 pm 
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Joined: Sun Jun 17, 2012 10:51 pm
Posts: 14
Location: Summit Hill, PA
26686GU


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 Post subject: Re: T43 LCD help
PostPosted: Thu Jun 21, 2012 8:40 pm 
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Joined: Sun Jun 17, 2012 10:51 pm
Posts: 14
Location: Summit Hill, PA
ajkula66 are you there?? Where can I purchase these fuses?


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 Post subject: Re: T43 LCD help
PostPosted: Thu Jun 21, 2012 9:03 pm 
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Senior ThinkPadder
Senior ThinkPadder

Joined: Sun Feb 25, 2007 11:28 am
Posts: 12690
Location: Albrightsville, Pennsylvania
Before you purchase anything, make sure it indeed is a blown fuse.

I believe that www.mouser.com would be the place to look for them...

Good luck.

_________________
...Knowledge is a deadly friend when no one sets the rules...(King Crimson)

Cheers,

George (your grouchy retired FlexView farmer)

Running Linux while collecting SSDI: A31p, T42p

Abused daily: R60F, R500F, T60, T61, T410

For sale: T601 QXGA FrankenPad


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 Post subject: Re: T43 LCD help
PostPosted: Thu Jun 21, 2012 9:28 pm 
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Joined: Sun Jun 17, 2012 10:51 pm
Posts: 14
Location: Summit Hill, PA
I guess I could take the MB out and try to re-solder the joints that hold the connector in place. What do you think?


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 Post subject: Re: T43 LCD help
PostPosted: Thu Jun 21, 2012 9:55 pm 
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Senior ThinkPadder
Senior ThinkPadder

Joined: Sun Feb 25, 2007 11:28 am
Posts: 12690
Location: Albrightsville, Pennsylvania
I wouldn't advise that course of action...

_________________
...Knowledge is a deadly friend when no one sets the rules...(King Crimson)

Cheers,

George (your grouchy retired FlexView farmer)

Running Linux while collecting SSDI: A31p, T42p

Abused daily: R60F, R500F, T60, T61, T410

For sale: T601 QXGA FrankenPad


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 Post subject: Re: T43 LCD help
PostPosted: Thu Jun 21, 2012 10:09 pm 
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Joined: Sun Jun 17, 2012 10:51 pm
Posts: 14
Location: Summit Hill, PA
Not sure why?? I have fixed dozens of ipods/computers by re-soldering loose joints. It's easy with the right iron.


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 Post subject: Re: T43 LCD help
PostPosted: Thu Jun 21, 2012 10:16 pm 
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Senior ThinkPadder
Senior ThinkPadder

Joined: Sun Feb 25, 2007 11:28 am
Posts: 12690
Location: Albrightsville, Pennsylvania
I'd try pinpointing the exact issue at hand prior to grabbing a soldering iron, but that's me...

_________________
...Knowledge is a deadly friend when no one sets the rules...(King Crimson)

Cheers,

George (your grouchy retired FlexView farmer)

Running Linux while collecting SSDI: A31p, T42p

Abused daily: R60F, R500F, T60, T61, T410

For sale: T601 QXGA FrankenPad


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 Post subject: Re: T43 LCD help
PostPosted: Fri Jun 22, 2012 8:13 pm 
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Joined: Sun Jun 17, 2012 10:51 pm
Posts: 14
Location: Summit Hill, PA
Thanks. I just noticed that you live about 30 minutes from me. I'm about 12 minutes from Jim Thorpe. Small world!


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 Post subject: Re: T43 LCD help
PostPosted: Fri Jun 22, 2012 11:04 pm 
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Senior ThinkPadder
Senior ThinkPadder

Joined: Sun Feb 25, 2007 11:28 am
Posts: 12690
Location: Albrightsville, Pennsylvania
If you don't get the issue resolved within the next week, you may just wanna stop for a cup of coffee and let me take a peak at it...

_________________
...Knowledge is a deadly friend when no one sets the rules...(King Crimson)

Cheers,

George (your grouchy retired FlexView farmer)

Running Linux while collecting SSDI: A31p, T42p

Abused daily: R60F, R500F, T60, T61, T410

For sale: T601 QXGA FrankenPad


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 Post subject: Re: T43 LCD help
PostPosted: Sat Jun 23, 2012 7:51 pm 
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Joined: Sun Jun 17, 2012 10:51 pm
Posts: 14
Location: Summit Hill, PA
Wow, thanks for the offer. I will keep that in mind as well as keep you posted on any fixes/challenges.

thanks


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 Post subject: Re: T43 LCD help
PostPosted: Sun Sep 30, 2012 11:44 am 
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Joined: Sun Jun 17, 2012 10:51 pm
Posts: 14
Location: Summit Hill, PA
Started messing with the T43 again. Surprisingly today, when it was booting up, I pressed the LCD on/off switch up and about 5 times, and the screen came on as normal. I'm thinking that this rules out a blown fuse. LCD on/off switch bad/loose????? I really hate to have to get rid of this T43, since everything else works so good. Thanks everyone for reading :-)


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 Post subject: Re: T43 LCD help
PostPosted: Sun Sep 30, 2012 12:16 pm 
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Freshman Member

Joined: Mon Jul 23, 2007 4:04 pm
Posts: 115
Location: Woodstock, NY
mjm4jc wrote:
Started messing with the T43 again. Surprisingly today, when it was booting up, I pressed the LCD on/off switch up and about 5 times, and the screen came on as normal. I'm thinking that this rules out a blown fuse. LCD on/off switch bad/loose????? I really hate to have to get rid of this T43, since everything else works so good. Thanks everyone for reading :-)


Maybe. I had that switch fall off the LCD cable on my T43. Try resoldering the switch to the cable and see if it helps.

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ThinkPad T60 1951-43U (with many upgrades)


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 Post subject: Re: T43 LCD help
PostPosted: Sun Sep 30, 2012 1:00 pm 
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Joined: Sun Jun 17, 2012 10:51 pm
Posts: 14
Location: Summit Hill, PA
Oh, I thought the switch is soldered to the board, not the cable. Not sure what you mean?


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 Post subject: Re: T43 LCD help
PostPosted: Mon Oct 01, 2012 8:43 pm 
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Joined: Sun Jun 17, 2012 10:51 pm
Posts: 14
Location: Summit Hill, PA
ajkula66, and suggestions???????


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 Post subject: Re: T43 LCD help
PostPosted: Mon Oct 01, 2012 8:55 pm 
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Senior ThinkPadder
Senior ThinkPadder

Joined: Sun Feb 25, 2007 11:28 am
Posts: 12690
Location: Albrightsville, Pennsylvania
mjm4jc wrote:
ajkula66, and suggestions???????


Apologies, neighbour, some of us have to work for a living, and my daily commute is 5 hrs +... :mrgreen:

Anyway...remove the upper keyboard bezel, and use the machine without closing the lid for a couple of days, see where that gets you. No movement is preferred, the laptop needs to be on a stable surface.

_________________
...Knowledge is a deadly friend when no one sets the rules...(King Crimson)

Cheers,

George (your grouchy retired FlexView farmer)

Running Linux while collecting SSDI: A31p, T42p

Abused daily: R60F, R500F, T60, T61, T410

For sale: T601 QXGA FrankenPad


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 Post subject: Re: T43 LCD help
PostPosted: Mon Oct 01, 2012 9:42 pm 
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Joined: Sun Jun 17, 2012 10:51 pm
Posts: 14
Location: Summit Hill, PA
ok, I'll give that a try.


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 Post subject: Re: T43 LCD help
PostPosted: Fri Oct 05, 2012 1:00 am 
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Joined: Sun Feb 01, 2009 8:47 pm
Posts: 42
Location: Detroit, Michigan
mjm4jc wrote:
Started messing with the T43 again. Surprisingly today, when it was booting up, I pressed the LCD on/off switch up and about 5 times, and the screen came on as normal. I'm thinking that this rules out a blown fuse. LCD on/off switch bad/loose????? I really hate to have to get rid of this T43, since everything else works so good. Thanks everyone for reading :-)



That isn't the cable.
It is tempting to believe it's the cable but what's happening is clicking the switch as if your closing the lid is sending a surge to the CCFL and momentarily reinvigorating a dying LCD the way a defibrillator can animate a corpse.

Flicking that switch, everytime I see this issue it is more often a dying/dead CCFL and sometimes a bad inverter.

I feel bad for anyone who logically attempts to implement sound troubleshooting techniques by replacing the SXGA / XGA cables since (it is fair to assume the LCD cable switch is bad) those cables rarely fail and they're a PAIN TO REPLACE.

Just to realize it was something else and the time +frustration disassembling a ThinkPad ingot LCD makes me regret dropping out of law school.


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 Post subject: Re: T43 LCD help
PostPosted: Fri Oct 05, 2012 4:55 am 
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RBS10000
RBS10000

Joined: Mon Sep 18, 2006 5:17 am
Posts: 13615
Location: Mt. Cobb, PA USA
If you are REALLY patient and handy, you can try and replace the CCFL yourself.
I have repaired many 15" screens successfully, but have only managed to finish one 14.1" screen (like yours is).
Every single one of them is a pain in the butt, the absolute worst is Hitachi, then Samsung, then LG-Philips.
You can find parts and instructions on www.lcdparts.net or they do it for you for ca. $75.-

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 Post subject: Re: T43 LCD help
PostPosted: Tue Oct 16, 2012 5:39 pm 
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Joined: Sun Jun 17, 2012 10:51 pm
Posts: 14
Location: Summit Hill, PA
Yeah but keep in mind that I took the entire LCD of my other working T43 and put it on this one, and there was no change.


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 Post subject: Re: T43 LCD help
PostPosted: Tue Oct 16, 2012 5:45 pm 
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Senior ThinkPadder
Senior ThinkPadder

Joined: Sun Feb 25, 2007 11:28 am
Posts: 12690
Location: Albrightsville, Pennsylvania
That very well may be a sticky switch.

Had an A31 once that I almost threw against the wall after I changed everything and it turned out to be a faulty switch...

_________________
...Knowledge is a deadly friend when no one sets the rules...(King Crimson)

Cheers,

George (your grouchy retired FlexView farmer)

Running Linux while collecting SSDI: A31p, T42p

Abused daily: R60F, R500F, T60, T61, T410

For sale: T601 QXGA FrankenPad


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 Post subject: Re: T43 LCD help
PostPosted: Tue Oct 16, 2012 5:56 pm 
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Joined: Sun Jun 17, 2012 10:51 pm
Posts: 14
Location: Summit Hill, PA
Well, the switch goes up and down really nice and does come all the way up to send the signal to turn on the backlight. Of course, this doesn't mean that the switch isn't still bad. I tired using it with the upper bezel off-----no difference. Have you ever changed the switch before?


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