if it have screw, you can open it!
Anonymous posted an answer for this Gateway /ton 160W Power Supply (6500582) Power Supply:
"hi, seems to be a problem design, you can check the users review..."
Anonymous posted an answer for this Compaq Refurbished 280WATT POWER SUPPLY FOR PROFESSIONAL WORKSTATION 5100 Power Supply:
"i have seen 2 models ,one compatible ATX the other not,to figure how it turns on try with..."