Gateway MT3705, model number is W340UI. How do I disassemble it?

You might try cleaning out the inside of the case with some compressed air.Make sure pc is unplugged before doing this.
Dust and dirt accumulating inside pc will make it overheat and pc's do not like too much heat buildup.Also, if the thermal grease on the CPU is getting old, the CPU will overheat and that could shut it down. How old is your pc?Realplying New thermal grease onto the Processor will allow heat to transfer off of it better than before.It just sounds to me as a heat related issue.Make sure too that all your fans are operating ok.
including the CPU fan.

the computer should least display anything when malfunction were present. Also, the computer would provide message details of the condition if any suddenly were encountered. Observe the computer for any new features thought as unusual. Consult with technitians

As an initial solution, I would recommend checking to see if the cooling fan is running properly. Also, you could have a buildup of dust around the CPU/heat sink. A thorough cleaning to remove dust and dirt may well do the job.

Just as an aside, you haven't been overclocking the CPU, have you? That could be a problem.
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http://support.gateway.com/support/drivers/dlcenter.asp?cmpid=topnav

This will let you search by your serial number or you can select the drivers from "Browse all Drivers" tab and then select Notebook computers, Model MT3705, and your operating system . Hope this helps, Best Regards, -md

I'm download every driver for my pc from this tool: Driver Update Software for XP Vista 7 8. You can take a look if you want.

wow this is quite the job you are undertaking but can be done, as far as amanual to take this aparty the only way i know to get one is through gateway themselves and good luck with that, having said this i took apart my laptop and replaced the fan but it wasnt easy and theres a bout 100 screws

Hello bmalachowski,

(Yes, another web link!). Here's a link to the pdf version of the user guide. Hopefully, you'll find useful information for opening the case: http://assets.gateway.com/s/Manuals/Mobile/8512150.pdf

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Have a great day,
martyshaw152

Doublclick your speaker icon in your tray (lower right hand corner) and there are seperate sliders for output volume and speaker volumne. If you don't find it there, Start button>control panel>sound and audio icon> advanced settings.

Please vote if this helps you.

Cleaning the fan won't do it. If it's not turning then the bearings are probably gunked up. Replacing the fan is the best solution. Your Gateway laptop still has a screw to be undone. It's probably behind a label or inside a door. Once the screws are gone the top lifts off easily.

Replacing a case is one of the most involved repairs on a laptop because you are basically disassembling the entire thing. You will want to be very careful as there are plastic clips you can break, start by removing the harddrive, the memory door / memory and battery. Take all the screws from the bottom (tape them down on a piece of paper to remember their position, you can write down labels from where they came from. when this is done you should be able to remove the cd drive and lift the keyboard. Remove all the screws from under the keyboard, and remove the ribbon connectors. The upper and lower plastic should snap apart with a little tension. After your inside you can remove the rest of the screws to take out the motherboard. These instructions are generic to most laptops, your should be fairly similar.