how to replace motherboard and pwr supply- where to look?

I am thinking of replacing the motherboard and pwr supply in my dell dimension 4550.
I want to know what facts do I need to know about the motherboard and pwr supply to purchase new ones? and where to look - in the software or do I have to actually look at hard ware to find serial numbers or whatever i need?
Thank you
davetoughAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Rob SiddellCommunity Educator IICommented:
I would contact Dell Tech support to help you find the right part numbers for replacing them. All you will need for them is your Service Tag located on the computer case.
0
Rob SiddellCommunity Educator IICommented:
you can either call them or chat with them online at support.dell.com

I would suggest chatting online as it can be difficult to understand some of the thick accents so there is less room for confusion on both ends.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Desktops

From novice to tech pro — start learning today.