My mac whistles and does not boot.
Hi, I'm new here. I have an old Macintosh SE/30. I bought it second hand in 1995. Just recently, I brought out of storage and powered it on for the first time in 10 years. It worked perfectly. One day, I powered it on to try to remove some old files. I forgot to turn it off, and it was on for about 1 1/2 hours. I turned it off, and later that day, turned it back on. Instead of bonging and booting, the screen remained dark, and it made a pulsating whistle sound. I opened the mac up, and checked all of the capacitors, and, surprisingly enough, none of them had burst. I also restated the ram and rom, checked all the connections, and cleaned the analog and logic boards. There are no burnt/broken parts on either of the boards, or on the CRT, atleast, that are visible. The inside and outside are in perfect visual condition, and look as they shoud. The sound appears to be coming from the analog board, near the fan/flyback transformer. Unfortunately, I was not able to get a recording because it was to high for any of my cameras to capture it. It's a high, loud, whistling sound, and occasionally the fan would come on as well.