FX-Spider (FX2025) can change screen resolution when RTC battery discharges. Black screen edges appears as a result
Fixing:
- Open CPU metal backpanel
 - Uscrew and remove motherboard holding screws
 - Remove memory card
 - Connect PS2 keyboard to Spider CPU and VGA display if possible
 - Connect 24VDC power to Spider CPU, press and hold "Delete" button at the same time. Wait until BIOS welcome screen appears
 - Select "Advanced Chipset Features" and press Enter
 - Select "Flat Panel Configuration" and press Enter
 - Select "resolution" by pressing Enter and select correct resolution as 640x480a
 - Press F10 and Enter to save changes
 - Collect and mount Spider CPU