Hello everyone.
I have a Rigol DS1102E wich I haven't use in a couple of months, I was working on a device and when measured the clock signal, te signal looks untriggered, so I put the probe in the compensation pin, the 1khz signal should look like stable and steady, but I looks untriggered.(See gif and pic below)


If anyone can help with this, I have no idea how the trigger section of this or any scope works, so any help explaining this is welcome, and a hint where or what section of the PCB to look .
Some other details:
-The measurements works fine.
-The knob varies the level and I put it between the signal in edge mode, but within ot not the signal there is no difference.
If any other detail is important please post it and I answer it. Thanks.