Yes, buy a 900W UPS
Run broadband going into modem through that first, then if you have a router, run RJ45 back through, and then out to devices. Needs both before it gets to you.
Pull your drives, disconnect everything, reset SMC.
Follow Linc suggestions - you DID look and notice this -
And make sure to always have bootable backups (clone) of your system and drives as well as other backup types and an extra drive on hand, spare. But never would I run important, expensive, equipment that I care about w/o a UPS. I've seen a modem rendered semi operable. I now keep a spare cable modem around too.
Startup Manager: How to select a startup volume
Troubleshooting: My computer won't turn on
If your Macintosh computer won't turn on, here's how to troubleshoot it. Please keep in mind that although your computer may display similar symptoms that prevent it from showing video, this article discusses what to do if the computer won't turn on, meaning that when you press the power button:
- You don't hear a startup chime.
- You don't hear any fan or drive noise.
- The power button or power indicator doesn't light up at all.
If your computer doesn't display any video, it may display one or more of these similar symptoms when you press the power button:
- You may hear a startup chime.
- You may hear fan or drive noise.
- You may see the power button or power indicator light up.
If any of these conditions occurs, see Troubleshooting: My computer has no video instead.
If your computer won't turn on, try each of these steps:
- Make sure that the power cord is plugged into a working wall outlet, and that it's properly connected to the power adapter. (To check if the wall socket is working, plug in a lamp or other electrical device.)
- Make sure that the power adapter is properly connected to the power port on the side or back of the computer.
- Disconnect all accessories that are plugged into the computer, such as a printer, hub, or other mobile device.
- Reset the computer's PMU, SMC, or PRAM. Refer to the instructions for your model:
reset SMC For "Mac wont' turn on or boot" and related
Note: It is possible that the SMC could encounter an issue that may cause unusual system behavior typically related to the symptoms described below. In some cases, resetting the SMC may be the only correct method to resolve the issue,
And for good measure while it is unplugged from the wall outlet and all the cables are disconnected, HIT the power on button for 10 seconds! Reconnect power and keyboard and mouse. Wait 60 seconds. Try to power on again.
And remove all the disk drives. You can just slide them 50% out of the drve bays. You should get a blinking "?" on the screen. That makes it easier and removes variable that the system disk drive is also having trouble now too.
General purpose Mac troubleshooting guide:
Creating a temporary user to isolate user-specific problems:
Identifying resource hogs and other tips:
Starting the computer in "safe mode":
To identify potential hardware problems:
General Mac maintenance:
You have a $3000 65lb tower computer and you don't know how to drive or put it into gear.