Final Analysis

 

Based on your input:

The computer turns on but there is no video or audio to indicate what is going on.  PC seems to receive electricity

 

Conclusion:  (1 of the following Parts is probably broken)

Usually either a failing motherboard* or power supply.

 

Desktop Computer  between $195 - $280

 

In Case the problem is your Computer Monitor - please review broken monitor options

 

Laptop Computer  - Repair not available for this problem.

 

*if your motherboard requires replacement, you will need to reinstall your aftermarket programs (programs installed after you purchased the computer)