Custom PC Issues - Power Surging
I built my first custom PC about 4 months ago, and all ran well until about two weeks ago, when I came in to get on it and I had a strange power surging. The processor and case fans were surging about twice per second, accompanied by a strange clicking sound.
It's a mid-level PC...my setup is as follows:
ASUS M4A785-M AM3/AM2+/AM2 AMD 785G HDMI Micro ATX AMD Motherboard
AMD Athlon II X2 250 Regor 3.0GHz Socket AM3 65W Dual-Core Processor Model ADX250OCGQBOX
APEVIA X-QPACK-BL/420 Black/Blue Aluminum MicroATX Desktop Computer Case w/420W Power Supply
CORSAIR XMS2 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model TWIN2X4096-6400C5
SAMSUNG Spinpoint F3 HD502HJ 500GB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive
LITE-ON 24X CD/DVD Burner Black SATA Model iHAS324-08
I tested the power supply last night, and found the 3.3V pins out of spec at 3.53V. After I finished testing, I had some inconsistent success. At first, the PC powered up right away and ran as normal. After a restart, it powered up when I held down the power switch a bit longer than usual. When my wife attached a USB device to the front hub, it suddenly shut off. Since then, it is back to the surging power I described earlier.
It certainly seems like a power distribution issue / short to me (and I've read some negative reviews about Apevia's built-in PS), but I'd like to get some expert opinions based on my symptoms.