In article <64pg4e$p4m at net.bio.net>, "Mark C. Enright" <bafm1 at susx.ac.uk> writes:
>We are running an ABI 377 sequencer and have a periodic problem with a
>green haze running down one side of the gel plates. Plate check reveals
>a raised trace at the corresponding side. Gels do seem to be placed
>correctly in the sequencer.
Check the screws on the back of the frame, they can come loose forcing
the frame away the laser. Alternatively some of your spacers may have
deposits on them making them slightly thicker.
HTH
John
