SNES:Vertical Line Fix
One problem that affects some SNES consoles is a vertical line constantly going down the center of the screen.
Info
The vertical line is most noticeable right when the console is powered on or in games with lots of dark scenes, such as Super Metroid. It’s believed the vertical bar is caused by the power drop during DRAM refresh; Essentially, an inefficient power filter.
Fix
Better Voltage Regulator
A fairly easy and efficient way to either remove or reduce the white line is by simply replacing the stock 7805 voltage regulator with one having a higher current rating, such as the ST L78S05CV-DG
Also, replacing the 1uF surface mount capacitor on the 78S05CV-DG's output circuit with a 22uF capacitor helps.
Instead of replacing the voltage regulator, you can try adding a capacitor to it.
- Start by adding a 16v 470uF capacitor to the voltage regulator (which is attached to the heatsink), as shown below. Note the orientation of the cap and that the negative end (the side with the stripe) is connected to the center pin. If that doesn't work, you can try a 1000uF cap as well.
