Agilent 5067-4191 needle port leaking

I have a 5067-4191 manual injector (600 bar) for HPLC 1260 Infinity II. All of a sudden, when I turned on the binary pump, the injection port started leaking (like liquid drop by drop started going out), and vent capillaries (ports 5 and 6) did the same.  The pressure is very low once the binary pump is "on". Can I solve this problem somehow?


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