How to put my laptop back together?

So, i have a Wi-Fi connection issue, and i was able to figure out that there was something wrong with either the antenna or the chip itself. I took the laptop apart but 2 issues occurred. 1. My hand slipped and it mixed up all the screws, so now i don't know what screw goes where. 2 some of the parts aren't fitting in where they are originally supposed to… I put it back together, but the hand rest is not correctly aligned and the lcd is acting up all weird. Is there some place for me to find an assembly guide? All i find are how to disassemble, and none of them say what screw goes where.

I have a lenovo t400

My laptop shuts off during playing games?

So I bough this Lenovo y50 last weekend and it's runs games great however last night while I was playing csgo it made like weird noise and then shut off completely, it was fully charged and plugged in and everything was working but then it just shut off on me twice and after second I stopped playing it.

Can I Upgrade my CPU in my Lenovo Thinkpad T400?

I currently have an Intel Core 2 Duo P8400 and I want to upgrade to an Intel Core 2 Duo E8435 or an Intel Core 2 Duo T9900. Is this possible, or will I just ruin something? I have read that someone was able to change the stock CPU to one from a mac. If neither of these work, what should I get to upgrade my speed to at least 2.8 GHz?

How to reset my lenovo laptop?

I visited many different websites trying to figure it out, I tried the F11 method but it dident work. Any other ways of resetting it?

How to fix windows 8.1 lenovo laptop?

I just did a reinstall of windows 8.1 and now everytime it restarts it reinstalls windows 8.1 on start up. Why is this? Also my laptop gets a message saying drive not handled error has to restart but after this I re install windows 8.1 again and it is ok but when I turn it off and turn back on it starts to reinstall windows on start up. Do I need to buy a new laptop this one is only 2014 model.

Which processor should I get with my laptop?

I'm buying a Lenovo yoga 500. I have the option of two processors
Intel® i3-4005U processor
Intel® Pentium® Processor 3825U

I don't know much about laptops so any help would be good
I will be using the device for everyday things - web browsing, Microsoft office, watching movies

My Lenovo won't shut down?

My Lenovo won't shut down?!

Added (1). I have a Lenovo laptop witch is Windows 8 then after i used it i wanted it to shut down it freezes when i put my cursor on the shut down button it only makes me move the cursor nothing else it won''t let me click on anything! Also, when i go to the start menu or press the start button it lags/freezes! Please help me I don't want to download anything because it might have virus and i do not have a anti-virus program please help me

How to change my keyboard layout back to the British Layout?

My keyboard has been swapping round the keys recently and my Uncle told me the problem was that it had changed the layout from the British keyboard to the USA keyboard layout, how do I change it back? (Windows 10 Lenovo Laptop if that helps)