I have no sound

Here is where to find the drivers... http://www.emachines.com/support/drivers.html
You need to follow the prompts in the blue boxes, to ID your pc model, then under the boxes showing the model, you need to choose your operating system from the drop down pick list.

Then it will show you all the drivers available for your model.

Your power supply has gone out. This could have been caused by a surege, dust or bad power outlet.

You can purchase a replacement off eBay for under $25.00.

Possibly a power supply. Be sure to check all electric cords, etc. first.

For that first open cpu cabinet then refix RAM memory. Find cmos cell on motherbord pull cmos cell for 15minutes then refix so all settings goes to factory defaults. Remove pci cards from mother bord then check display. Open processor fan and porcessor remove dust from all parts.]
Let me know if you need more assistance. Thanks.

to upgrade a motherboard... you would need to replace it with another one, on a motherboard you can upgrade memory, cpu, video card, hard drive, parts that are connected to it, but you don't really upgrade the motherboard itself..

try updateing ur emachine on emachines website there are many updates for cd rw

Here's the Support Link for your desktop. Look under User Guides, Hardware Reference. Also look on the motherboard for markings such as PW or PS and an indicator to where the wire goes.

This computer runs an Intel® PRO 10/100Mbps integrated Ethernet hence if you are running windows XP or Vista you should not need to install it. it will do so automatically. may I ask if youa re getting errors when you connect to a network over wired?

hola...
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http://www.emachines.com/support/product_support.html?cat=Desktops&subcat=T%20Series&model=T3958

Robert

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First check to see if a drive died. Unplug all the drive Floppy, hard and dvd or burns. I have come across many time that a drive will die and keep motherboard from booting. Being that you say you get a green light on the motherboard shows that the power suppy is providing some power. But for some reason the internal self test is faulting the power suppy. I have not come cross any bad power supplies killing a motherboard. But I have come across power supplies killing drives. The power switch is a normal open switch so the only time you be able test continuity on it is if you hold the switch in, or the closed position.