Virus A repair question...

[Arrrgh]

Don't know what causes this but since a few minutes the "+ Value" button gets stuck as soon as i press it...or me it seems as if the "spring" of the button is damaged... so the button goes down with the click but does not come up again... grml!

Anyone knows the cause of it?

Would you recommend to open the synth and have a look inside?

Thank you guys...