Question about IBM ThinkPad 760 EL Notebook

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When I connected an external VGA monitor to my IBM thinkpad 760 C the external monitor works.. but the internal/original monitor goes black what to do?

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It's supposed to do that. The internal VGA card doesn't have enough power to support both screens at higher resolutions than intended.

Posted on Mar 25, 2011

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Posted on Jan 02, 2017

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How do i switch to external monitor


Virtually all IBM and Lenovo ThinkPad and ThinkCenter laptops allow you to hook up an additional monitor or projector to the computer. When you add an external monitor or projector to your notebook, you can choose to view the display on the computer, on the external device, or on both the laptop and the external monitor or projector at the same time. Toggling between viewing devices is as simple as pressing a couple of keys on the keyboard.

Shut down the laptop. Plug the VGA monitor cable from the external monitor or projector into the blue VGA port on the back of the computer. Turn on the external monitor or projector first, and then the Lenovo laptop. Allow the notebook to boot into Windows normally. Press the "Fn" and "F7" keys at the same time to switch the display from the laptop to the external monitor or projector. Press the "Fn" and "F7" keys again to enable the display on both the laptop and the external display device. Press the "Fn" and "F7" keys again to display screen contents only on the laptop LCD. choose support you need http://www-307.ibm.com/pc/support/site.wss/MIGR-54305.html http://www-307.ibm.com/pc/support/site.wss/MIGR-4YQHUC.html enable tv out on thinkpad http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-58625

Feb 13, 2013 | IBM Lenovo 3000 N200 PC Desktop

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

The monitor does`nt work, but the computer still works,how can I get a Dell monitor to work with the T41 notebook. I have them connected,but the monitor stays black


This may be a defect in the graphics card, since the external monitor (is it properly connected to the VGA-connector and is the power on?) should be recognized automatically and display instead of the internal monitor. The behaviour of the laptop in case an external monitor is connected can sometimes be controlled via the BIOS, which is impossibile to do if the internal monitor or the graphics card doesn't work. I'm afraid that, if you can't reset the BIOS yourself, this may be a case for the repair service.

- Marinus

Sep 29, 2010 | IBM ThinkPad T41 Notebook

1 Answer

I want to get out put on external monitor through my IBM thinkpad R52. Please advise any shortcut???????/


Connect your external monitor to VGA port and press key combination Fn+Ext Screen

Sep 27, 2010 | IBM ThinkPad R52 Notebook

2 Answers

How to connect external monitor in ibm type 2658


Most laptops have a blue external 15pin video connector. Connect an external monitor's video cable to this port, then power up the external monitor first then boot up the ThinkPad, the video information will automatically divert to the external monitor first.
You can toggle/cycle the laptop and external monitor so they display on both the laptop and external monitor or the laptop LCD screen or external monitor by pressing the blue Fn key and then the F7 key several times.

Jun 19, 2010 | IBM ThinkPad R32 2658 Notebook

1 Answer

IBM thinkpad type 2647 - after installing external


Go to control panel / sounds / audio, and see if the boxes have greyed out writing, if so then the driver needs reloading, if they are all good check all settings.

Meant to ask if volume control icon is showing in the right lower task bar.

Dec 22, 2009 | IBM ThinkPad T23 2647 Notebook

1 Answer

I have 2 ibm thinkpads t40, on one of the systems the lcd inverter and screen get no power but when i take the lcd and connect it to the 2nd ibm tkpad it works fine, What would be wrong with the one lap...


On the second Thinkpad laptop, that doesn't show a display with an LCD screen.
Plug a VGA monitor into the VGA port on the back of the laptop.
Hold the Fn key down, tap once on the F7 key (Toggle your display over to an external monitor)

Give the VGA monitor a few seconds to come on. (It's a VGA monitor)

Do you have a display on the external monitor? No? You May have a bad GPU then. (Graphics Processing Unit,

http://en.wikipedia.org/wiki/GPU )

Fix? Change out the motherboard. Possibly Ebay has one, dunno.

VGA monitor has a display? Then you may have a bad Inverter. The Inverter provides power for the LCD screen. Inverters go bad.

Are both Inverters the same? (Laptop to laptop)
BE SURE. The Inverter MUST match the LCD screen!
Check the numbers on both Inverters. If they are the same, switch the good one over to the 2nd laptop. See if you have display now.
No?
Then it's the GPU.

Service Manual for IBM Thinkpad T40,

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

Copy and paste the above link into your Address bar. Press the Enter key. (I don't post direct links that you just click on. I want the asker to be able to see where the link takes them, by looking at the link. I feel it helps make the asker more comfortable with my solution, knowing I have their best interest in mind.
Regards,
joecoolsvette)

(If this link doesn't work for you, come back, and let me know)

Nov 20, 2009 | IBM ThinkPad T40 2373 Notebook

1 Answer

IBM ThinkPad iSeries 1400 LCD not functioning


I am afraid you are correct, your laptop screen is not usable and unless you’re a trained professional I do not recommend trying to repair the monitor itself. In fact, to do so would be rather dangerous to your own well being, but you do not have to throw your ThinkPad away. You could continue to use it with the external monitor or you could send it into Dell and pay them for a replacement. Look around though, there are probably other people who could provide this service for less, beause large corporations usually charge you more than necessary.

Jan 03, 2009 | IBM ThinkPad i Series 1400 Notebook

1 Answer

IBM Thinkpad T23 - unable to get external monitor to work


some times the conector for the external monitor has the pins bended or brocken try with diferent monitor if the por is burn there is a minimun of chance to trpair it only if you are expert on electronics and you can get the computer diagram and you know how to do the test and get the replacement other ways you have to get a new motherboard

Dec 30, 2007 | IBM ThinkPad T23 2647 Notebook

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