I have this thick blurry purple lines across my pictures when scanning on a brand new v370 scanner. Any idea where it's coming from? I've cleaned the scanner glass thoroughly and the negatives are clean
The bar could be due to an optical interference pattern, where a slightly-curved glossy photo touches the glass along a line. Test this by scanning a flat or matte surface, e.g. a plain piece of white paper.
It could be the result of the scan-head getting stuck for a second and them jumping when it passes by the obstruction. The issue might go away if the obstruction is something like congealed lubricant or a speck of dust. Try repeated scans to see if the issue disappears.
If neither help, return the new scanner for a refund or another of the same model.