The good news is that most Steam Deck errors fall into a handful of repeatable categories, and once you know the pattern, the fix is usually quick. Network errors like 105 and 150 almost always trace back to a DNS or connectivity hiccup. Black screens and freezes are often tied to a bad update or a rogue plugin. SD card errors usually mean a duplicate folder or a corrupted file system. None of these require you to be a Linux expert or send your device in for repair.