Question about IBM ThinkPad T43 Notebook

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T42 Turns off

Hi
I have T42p and it has recently developed a problem. The laptop would poweroff (not shutdown) completely if it was moved/or lcd was touched. I would then have to remove the power and the battery and reinsert ...then it would start....otherwise wouldnt power on even. I took out the keyboard and all the ram, even the bluetooth module, harddisk and dvd drive. and gave them a good blow.....now it is wokring much better.....But now the problem is still in that area.....if i apply a bit of pressure (not too much ) near the IBM access key on the keyboard or the upper left side in general it powers off again.....I have tried to see if there is any thing loose but apparently not.

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Hi muneeb_shauk

It sounds like you have a lose connection. I wouldn't really be most likely under the keyboard but probably under the strip that is above the keyboard. That strip would need to be removed and reseat the connections. You might need to have a shop do that if you are not comfortable with taking off that piece.

Hope that helps,

Michael

Posted on Nov 28, 2008

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IBM thinkpad t42 with a t42p screen has weird lines all over the screen. I need to be able to fix this! Please.


Would like to ask.......
Did you state ThinkPad T42p LCD screen in a ThinkPad T42?

Same type?
XGA to XGA, or SXGA to SXGA, or UXGA to UXGA?

Did you use the screen Inverter out of the T42p?
An LCD screen, and a screen Inverter are a Matched unit.
Post back in a Comment.

Moving on..........

Diagnose:
Problem can be;
1) Graphics chipset
2) Video Cable
3) Screen Inverter
4) LCD screen

I will detail a diagnostic flowchart, along with my input; after the question above has been answered.

No use detailing it out if;

One: YOU are the one who replaced the LCD screen.
You already know the disassembly procedures, and this will greatly shorten the flowchart I would have stated.

Two: It\'s the wrong LCD screen, or the wrong screen Inverter is being used.

Awaiting reply, please post in a Comment.

Regards,
joecoolvette

Mar 10, 2013 | PC Laptops

1 Answer

T42p display lights for a couple of minutes through startup then goes dark


But fan still runs, and it sounds like the harddrive is spinning?

Diagnose.

Do you have a VGA monitor available?
You can use a CRT type, (Looks like a small TV), or a flat LCD screen monitor if it has a VGA cable.

http://en.wikipedia.org/wiki/VGA_connector

1) Laptop OFF, monitor OFF, connect the VGA monitor cable to the left side of the ThinkPad T42. (DisplayPort)

2) Turn the monitor on. If a CRT type allow it to warm up.
Turn the laptop on.

By factory default, the display should show on the external VGA monitor.
If not;

There are at least three display options available;
1) Internal monitor of laptop ONLY
2) Internal monitor of laptop AND external VGA monitor
3) External VGA monitor ONLY.

Press, and hold down on the Fn key, and at the same time tap once on the F7 key. The F7 key is the Display Toggle-Over key.

3) Good display on external monitor?
Problem is the video cable, or inside the Display Assembly.

Since the display goes dark after a couple of minutes, I can tell you the problem is the screen Inverter, or Backlight.
(Inside the Display Assembly)

90 PERCENT OF THE TIME the fault is a bad screen Inverter.

Primer:
An LCD screen cannot produce light. It needs an additional light source.
A Backlight is the additional light source.

A Backlight can be a CCFL, or a series of LED's.
(Light Emitting Diode)

The Lenovo ThinkPad T42 series of Notebook PC's, uses a single CCFL for a Backlight,

http://www.screentekinc.com/IBM__ThinkPad__T42-series-laptops-lcd-screens.shtml

A CCFL is a Cold Cathode Fluorescent Lamp. (Bulb)
Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.

[Average thickness is 2mm. That is a little larger than 1/16th of an Inch.
Average length is almost as long, as the LCD screen is in height ]

A screen Inverter converts the power from the laptop, for the LCD screen, and Backlight.

(Older versions of backlighting that used a series of LED's, used a screen Inverter. Newer versions do not. For these replace the LCD screen)

A screen Inverter and an LCD screen are a MATCHED unit. Make sure you get the correct screen Inverter, or LCD screen, when buying.

Primer over.

One example of a screen Inverter for the T42's,

http://battery-adapter.com/product_info.php/products_id/3381/vThinkpad+T42

Pictorial guide for replacing a screen Inverter, in a ThinkPad T42 series of Notebook PC,

http://www.insidemylaptop.com/replace-screen-inverter-in-ibm-thinkpad-t40-t40p-t41-t41p-t42-t42p-laptops/

http://www.laptoprepair101.com/laptop/2007/01/31/replace-screen-inverter-fix-backlight/

Lenovo Support link to the Hardware Maintenance Manual, for the ThinkPad T42 series of Notebook PC's,
(HMM. It is a Service Manual),

http://support.lenovo.com/en_US/guides-and-manuals/default.page?

Click on the bold black subheading -
Hardware maintenance manuals
Then click on the blue -> [+] Click for files

It is a PDF file.
It may take up to 30 seconds before the first page comes up.

For additional questions please post in a Comment.
Regards,
joecoolvette

Jul 29, 2012 | Lenovo ThinkPad T42 Notebook

1 Answer

I have IBM THink pad, T42p. It shows Fan error. Wh...


Cleaning the fan may help. I use a vacuum cleaner and hold the pipe against the air inlet of the computer and then against the exhaust outlet. That clears the fluff quite easily.
Hope this helps.

May 21, 2010 | Lenovo ThinkPad T42 Notebook

1 Answer

Cant connect the to internet is there a internet wireless button i must turn on?


Here is your service manual for the laptop, makes a good reference point. Make sure to make yourself a copy.

http://tim.id.au/laptops/thinkpad/T40-T40p-T41-T41p-T42-T42p.pdf

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Hi, audio goes off after few seconds for IBM T42.


You may be installing the wrong verision of the driver or installing it the wrong way.

Jun 19, 2009 | IBM ThinkPad T42p: T42p Pentium M 1.8GHZ,...

3 Answers

Ibm t42 display turns off as if I had shutdown


You can test the computer this way. Connect the video output at the back of the laptop's base to a known working monitor. If the problem disappears completely then you know it is a screen problem, mostly likely. But if the same thing happens with the known working monitor connected to the Thinkpad, then you very likely have the BGA problem, a part that was soldered less than well (due to the restriction of lead not being allowed in the solder due to government regulations). And it may also be caused by flexing the base due to moving the laptop with poor support for its weight and resulting motherboard flex on rather delicate microsoldering. There are several services that "reball" the Ball Grid Assembly, and there are motherboards available as well that can replace the non-working ones. This is not a cheap fix to undertake but it can be done.

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T42 is not starting


Try doing a manual system reset. To do this:
1. Remove battery and unplug AC adapter.
2. Press and HOLD power ON button for 30secs. at least
3. Put back the battery and plug back the AC adapter
4. Power ON the laptop as normal.

Jan 17, 2009 | IBM ThinkPad T42p Notebook

1 Answer

Working with 2 Screens


What you have to do is enable "Extended Display" ie: Check the Box in Display Settings "Extend the Desktop onto this monitor" this basically give you one large independent desktop, allowing more work space. The other way is to "Clone" that is same image on BOTH monitors. There is a good program to help called UltraMon it is great. www.realtimesoft.com/ultramon/download.asp Also ensure you have the most up to date Drivers for your Radeon..

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