No signals after lamp detector replacement

Our LC Infinity 1220 had a lamp replacement recently and was working fine after some runs,
 but on the second day using all chromatograms were no peak at all. The detector seems to work fine, it gets idle very quick, but I tried to run several different conditions and the result is the same. The only signal that I could get is this one for acetone, but is very weird.
Someone can help me with that?

Aramis Pereira

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