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사용자에게 답변하기: Making high pitch noiseFrom your description, it sounds like the pump either went or it got clogged. This is probably too late for you, but here are my recommendations: 1. If you have not done a full-on cleaning cycle, do that. Replace ALL the water with hydrogen peroxide. Leave the cap off, and set a folded up washcloth or hand towel on top. Make sure it does not drape over and block the vents on the sides. Set the temperature to the highest it will go (I think it goes up to 105º F or so, and then says HI.) Let it run this way for 6 hours. The cloth is there to absorb water that may bubble up during the cleaning. The heat and chemicals should kill most of the growth. If your system is really gunked up, pour it all out and repeat, the more gunk you can pour out the better. 2. I found my pad and cube started getting gunked up with bacterial growth. That could clog the pump eventually if you do not run the cleaning cycle like they recommend. I eventually started just filling my cube with 100% hydrogen peroxide all of the time, even t...
사용자에게 답변하기: Why is my iMac G4 not powering up (after a power outage)?It is possible that you could replace the battery ~$5, there are several guides here on iFixit, and one of them is a stinker, and some of the others are better. Anything that is 2 steps long is not detailed enough for non-experts. Once you replace the battery, you'll want to do the PRAM reset trick one more time. This may be a long-shot though, even with my battery dead, I was able to get my iMac to boot sometimes, but I've seen Windows PCs stay dark until the battery was replaced... so, this step is cheaper than buying a new Mac!