My IBM T41 laptop will not boot up! When i press the power button all the lights come on then only the crocked Z with a circle and d battery lights stay on! What should i do?

Locked out how? With a password? You can't switch what off? Press and hold the power button until it shuts off or Just unplug it and remove the battery as a last resort. With no power source, it will cut off.

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to find one

The motherboard is most likely damage. First remove the battery, make sure it is unplug, and press and hold the power button for 30secs. Than put the batty back in and see if it helps. If this doesn't, try removing the hard drive and memory and see if it turns on. If not than the motherboard is dead.

I concur with what Diegotech stated.

To iterate further;

1) The DC Power Jack (DC IN), may have cracked solder joint/s on the motherboard connector, (Female), where the DC Power Jack plugs in.

Resolder

2) The DC Power Jack may be broken.
Center Pin mount, and/or body of DC Power Jack, and/or Outer Shell mount.

Replace DC Power Jack.

3) Wires from the DC Power jack plug to the female connector on the motherboard, may be bad.

Replace DC Power Jack.

Two examples, of a place to buy an IBM ThinkPad T41 DC Power Jack,

1) http://www.buy.com/prod/dc-power-jack-connector-socket-for-ibm-thinkpad-t40-t41-t42-r50-r51-r52/q/sellerid/23962916/loc/101/215782035.html

2) http://www.machinaelectronics.com/store/buypart/IBM_Thinkpad_T41/DC-P001

Past this point it's a bad DC sensor on the motherboard.

Replace motherboard.

IBM ThinkPad T41 Service Manual, (Free),

http://www.tim.id.au/blog/tims-laptop-service-manuals/#toc-ibmlenovo

On this page go down to the 8th line.
The one that starts with > ThinkPad T20.

Go across, and click on > T41

Takes approximately 2 seconds to see the first page, and additional time to fully download.

Page 142 for 14.1 inch LCD screen
Page 151 for 15 inch LCD screen

(PDF file page number box at top)

try to turn it off, pressing the power button for 10 seconds.
that should do it.
if that doesnt work, disconnect the ac plug, then remove the battery.
wait 30 seconds and start it again.

hehe...I used to have some problems
and then came up with the solution to install other OS such as linux, lindows or anything else
and then reinstal it with windows booting...and then it works, u can try it

With the cd reboot and press F12 for a temporary boot list, select boot from cd. At this point just choose install xp and follow the prompts.

Hello, enter BIOS (by pressing "Delete")and find there restore default. If you drop it you need check inside laptop of connections components. Check Cpu or Ram.

No power or computer does not turn on. Additional information to why you may be recieving now power from the computer and/or why the computer is not turnning on.

Installing a pc computer power supply
Once no power supply is installed into the computer, place the new power supply into the computer and screw the screws into the back of the power supply.

POST troubleshooting steps. Note: Make sure your computer is turning on, if you press the power button and nothing happens (no lights, no sound, no fans, etc.

Good Luck, Please dont for get to Vote/Thank You.

Could a MoBo failure or nothing more that a connector- solder problem. I depends on your abilities- take it apart and have a look or Send it to a repair shop or Take it apart- shudder put it back together then send it to the repair shop ;-)