Monitors must have some way to store settings like a CMOS chip on a computer. I have one that won't keep refresh rates the same when I shut down. The display driver reports a different refresh rate then it actually uses. If I change them around again it works until the next boot. Is there a rechargable battery on the monitor that needs replacement? The Monitor is a 1999 Sylvania f77 that was stored and never used since it was new.