Posted 29 December 2005 - 07:38 PM
Run the PC with the cover off. Can you locate the source or general area of the noise?
Use a pencil (with some insulating tape, or masking tape, wrapped around the blunt end and at least 4" long) to jam the fan blades momentarily (caution - some of them kick fairly hard) see if you can find one that changes the noise.
If it does not seem to be coming from a fan then power off the machine and remove the power connectors for the CD drives and floppy drive and power on again.
It's possible your power supply may have been damaged in the power outage and is now buzzing internally - do NOT attempt to open the power supply box on any account. Buy a replacement unit.
Soltek QBIC, Pentium 4 3.0GHz, 512MB RAM, 200GB SATA HDD, ATI Radeon 9600XT 256MB, Netgear 54Mb/s WAP, ridiculously expensive Satellite Broadband
Windows XP Home SP2, Trend Micro Internet Security, Firefox, Thunderbird, AdAwareSE, Spybot S&D, SpywareBlaster, A-squared Free, Ewido Security Suite.