SID display indistinct

So, now I think my SID is also caught (MY02), although this is a bit different with me. The pixels don’t turn out correctly, but are just partly darker, partly brighter, that also applies to the font left (SPD etc.) and the clock. But now the strange thing: if I push through the different display modes, the error is always watching, only if I have the average speed shown, everything radiates in old freshness. That can then no contact error at the L You’re gonna have to clear me up before I take this thing apart for free.