: Start by testing the main input fuse near the terminals with a multimeter. If blown, do not simply replace it; check the bridge rectifier and primary power transistors for shorts first.

This guide provides a "repacked" overview of the schematic to help you navigate its complex circuitry, along with troubleshooting steps to address common failure points. Circuit Overview and Stage Analysis

: Regularly check connectors for corrosion to ensure a stable voltage input to the mainboard. Where to Find Schematic Resources

: Look for "bulged" or leaking electrolytic capacitors, particularly those near heat sources on the +12V rail. These often dry out over time, leading to unstable voltage or total startup failure. 2. Display or Backlight Issues