Macintosh LC II unsupported frequencies/resolution monitor
Hello,
I have a problem with my Macintosh LC II... A year ago, the Macintoh booted without any trouble into Mac OS 7. Then I let it off for a year but last week when I tried to turn it back on, the Power Supply made a not normal noise, so I replaced it since the computer wasn't decided to boot at all... So I installed the new Power supply, and tried to turn it back on again. But here is my problem. I Don't hear any chime from the Macintosh, but the fan is spinning and I can hear the hard drive working. Now, I plugged it in many monitors, but in all case, I can't see anything but sometimes error messages from the monitor : here are the results :
Apple 17" CRT display: black screen and yellow LED (nothing detected)
iiyama 20" Vision Master Pro 512 CRT display: black screen with yellow LED (nothing detected)
ACER 17" LCD screen : Error message (Unsupported frequencies) and green LED (signal detected)
SAMSUNG 27" LCD screen : Warning (Not optimal resolution, recommanded FullHD@80Hz) with fix blue LED (signal detected)
Does anyone know what can I do to fix this ?
Sorry for my bad English I am French...
Macintosh LC II-OTHER, Other OS, Mac OS 7