I wonder if anyone can shed some light on an issue i'm facing with my mac. I've recently had a repair carried out by a chap in the UK, to fix a charging issue. The machine charges perfectly fine now, but more recently I've experienced, on a few occasions, some really strange screen artefacts (pics attached). After spending £150~ just now on the charging issue, I'm not against paying to get this resolved, but I just want to know it'll definitely be sorted if I do. Best, Andy.