I've developed a slight screen glitch (SE/30); the screen's width now slightly grows and shrinks. It's not constant, but it is a bit bothersome. Other than this, the screen is pretty bright & stable.

Before I change the power supply (unless anyone else has any thoughts?), I'd like to reflow some of the analogue board's solder joints, just to make sure it's nothing I can do quickly.

Could anyone give me a quick run-through of what's safe to touch, and what isn't - perhaps for fingers and / or a soldering iron.

Thanks.