I would like to get into the busines of fixing computers,information
brokerage, or other computer related consulting business.
Unfortunately I cannot attend a
course because of my severe hearing loss. Does anybody know of a book,
internet site or other source of information that can help me?

Dear Vaac, 

Nice to see you back on GA. 

Here are some online/distance learning courses in those subjects: 

Online PC Repair, Maintenance & Hardware Courses
<http://www.worldwidelearn.com/online-training/pc-hardware-courses.htm> 
Several courses are mentioned in this directory, that could teach you
how to fix computers.

Education Centre Online
<http://www.educationcenteronline.org/> 
Various computer-related courses

Yahoo! Directory
B2B Computers > Certification Preparation Distance Learning
<http://dir.yahoo.com/Business_and_Economy/Business_to_Business/Computers/Training_and_Development/Certification_Preparation/Distance_Learning/>

Learn Direct
<http://www.learndirect.co.uk/> 

ISC Learn
<http://www.icslearn.co.uk/> 

Open University
<http://www.open.ac.uk/> 

Books: 
=====
Getting Rich in Your Underwear: How to Start and Run a Profitable
Home-Based Business by Peter I. Hupalo (2005)

101 Internet Businesses You Can Start from Home (Paperback)
by Susan Sweeney (*2001)

Start Your own E-Business (Start Your Own . . .) (Paperback)
by Jacquelyn Lynn (2005) 

Starting an Online Business for Dummies, Third Edition (Paperback)
by Greg Holden (2002) (For Dummies also have a book about starting an
eBay business)

Start Your Own Computer Business: Building a Successful PC Repair and
Service Business by Supporting Customers and Managing Money
(Paperback)
by Morris Rosenthal (2002)

I hope this answers your question. Please contact me if you need any
clarification on this answer before you rate it.

Good luck!

Sorrry for not rating sooner but I have nor gotten a chance to examine
your sources, but I think that they will turn out to be useful