In this video I go Troubleshoot an Toshiba Satellite U40017B PSU44E02N01EPT and repair it, won't turn ON

No music. No talking. Just work.
If you are taking your TOSHIBA U400 laptop apart be careful and wear an antistatic wrist band or use other antistatic device. If you need to change a LCD usually you don't have to take screen out of a laptop. You can leave it on a laptop and watch the last part of the video where I am taking LCD apart. If you need to change a keyboard, you don't have to take all bottom screws out. There are usually some marks, like a keyboard picture, on a case bottom. If you need to put a laptop back to work be aware of screws. They are different and you better remember or mark them somehow to insure that you will put them back in to a right place.
Some laptops I take apart first time, so don't be serious on my time and performance.
If something got broken ooops, it's your fault.
Believe me, some parts in your laptop are already broken, you just don't see that.
Have fun and good luck!!