Are you running a CPU card or the on board 030? I had 2 3000's, each eventually failed the local 030. I had to remove them and install a cpu card instead to bring them back to life. Another 3000 lost the local 882 co-processor. Once removed, the 3000 came back to life. As a quick fix, try resetting any socketed chips, memory included. Don't totally remove chips, too much risk of bending a pin putting it back. Just raise a smig and mash it back down.
Are the floppy drives clicking at start up? You might have lost one of the CIA chips. If I recall there is a diode near the serial and the CIA chips that can short. It's at the right side rear edge of the mother board, you'll have to remove the floppies and power supply to get to it. Clean the contacts on the daughter card. And using an old trick I came up with in the late 80's, LIGHTLY run one of those flexible finger nail files down the card slot and then blow out any debris
Well just a few ideas to get you started, good luck.
Plaz