But even if you don't know much about electronics, this page can be a (in the true sense of the word) valuable help, as it reduces the time for analyzing for the person who actually repairs your computer - and who usually wants to be paid :-)
For analysis, you should have a multimeter and a logic tester handy. In most
cases, repairing your equipment means soldering, so that a soldering iron is
recommended. If you're lucky, the faulty chips are socketed; a small
screwdriver is all that you need then.
Please check everything twice as there may be some inconsistencies.
Errors occurring occasionally: