I AM TRYING TO SOURCE A MOTHERBOARD FOR IBM THINKPAD T41P AS THE LIGHTS COME ON WHEN POWERED UP BUT NOTHING ON THE SCREEN. TYPE2373. LCD ALSO NEEDED. TKS.

You can switch to anexternal monitor or data projector by two methods.1. Connect the externalmonitor to the laptop's video port, power up the external monitor first and thelaptop. The video information will automatically switch to the externalmonitor.2. If you power up thelaptop first then you can switch the video output to the external monitor bypressing the Fn key and one of the Function keys, depending upon your make andmodel laptop. You can also toggle between the external monitor or both LCD screenplus the external monitor or back to LCD screen only by pressing the Fn keyplus one of the function key. Here is a list of keycombinations for some of the laptops :-IBM ThinkPad = Fn + F7HP and Compaq = Fn + F4Toshiba = Fn + F5Dell = Fn + F8

Kindly install LAN/Ethernet driver from the link below,

http://www-307.ibm.com/pc/support/site.wss/Program%20Files/IBM/Quest%20Input/temp_data/Library/Program%20Files/IBM/Quest%20Input/temp_data/MIGR-46258.html

exacly from the motherboard, i think u can not prepaire because much know electromagnetic to change the chipset so difficult 2 u. u can take to brand for prepair

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)

Hi there here is the link to show u how to do this


http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-46515

hope this helps

did u manage to enter your bios?if not, then i suspect your ram has a problem..normally notebooks are equipped with two modem...try to use one of them only....also, try to change the position(means slot A is for RAM A and slot B is for RAM B- try to place RAM A to slot B first n test your notebook)

hope it will help ; )

First, confirm that it is the screen itself. Connect the video output to a known working monitor and then power on your Thinkpad. if the known working monitor behaves the same way you can rule out the laptop's monitor as the source of the problem. This may be the BGA, Ball Grid Assembly, leadless soldering problem related to video chips on the motherboard, but first test the monitors.

You are lucky to have an external display! That means that your motherboard nor video card did not fry. Two possibilities here: the ribbon connector from the mobo to the lcd has been disconnected or your cathode tube/exciter is bad. You must have some electronic repair experience and laptops in particular for success here.   Every screw must be remembered as to its original location -lengths vary. ESD precautions must be observed (look that up if you don't know).  Follow the remove/replace procedures for the LCD and do not ever force anything. Here is a guide: http://www.insidemylaptop.com/replace-screen-inverter-in-ibm-thinkpad-t40-t40p-t41-t41p-t42-t42p-laptops/
 It is not difficult if you organize and use caution. Good luck, Steve Medley

Remove any devices connected and power it on by itslef, either on battery or power source, if it doesnt work, it may have bad processor, When they go bad most laptops wont boot period.

NO it may be you are have LCD problems try an external monitor if tht goes alrite that the latte is the problem.