My thinkcentre S50 is broken, help on upgrade/fix please?

So the motherboard in my thinkcentre is broken, so i'm thinking what kind of mobo should i buy (itx or what)? And will any mobo of the right size do or will i need a specific one? Thank you!

Added (1). P.S. I've built PC's before, and want to make this into a light use HTPC for some videos and film watching, e-mail and internet browsing(for mum) and minecraft (little brother).

Added (2). P.P.S. Is it worth repairing it, or should i sell it for parts, and build a custom HTPC… Muahahahahaha…

IBM ThinkCentre Graphic Card?

I just got an IBM ThinkCentre 8808 J9U and i'm looking for a new Graphic card I can get in it. Any suggestions?

Broadcom for A30 Thinkcentre desktop 8199?

Hi--just rebuilt a IBM thinkcentre A30 desktop and it's telling me in the device mamnge that I;m missing the ethenet controller I can't seem to find the proper broadcom driver please help

This is the site I found with the drivers--but nothing on ethernet controller(broadcom netxtreme gigabit ethernet) is what i believe i nedd? Thank you in advance.

http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-51601#ai

IBM Thinkcentre - Slave drive capability?

I have an IBM Thinkcentre 8172-Y1L 3.2Ghz Desktop Computer. It's a great unit but I would like to upgrade the hard drive memory. Does anyone know if this unit can be installed with a secondary internal slave drive, or does it only accommodate one drive due to its compact size? I hate to start from stratch if avoidable, but have not been able to find a reliable external hard drive unit option.