I wonder if it's the battery rather than the drill? That one's 8 years old. Might be duff battery (ie not enough juice to power drill, just enough to power LEDs)?
Doubtful. Lithium batteries aren't like the days of nicd. Lithium will either output power or not, no inbetween sort of thing.
Failed pat test usually only covers cable and plug which means cable was damaged or plug loose , miss wired , easily fixed .
If it failed. I've spoken to one or two chaps on site who fail a couple of items every now and again for the sake of making the test look worthwhile. I'm always hounded about it on sites but truth be told, I just buy a roll of self adhesive pass labels.
Lithium batteries fail, just like any other type - especially if they have been left fully discharged for a while.
I think I'd bale out of this one....
John
When a lithium battery has failed you won't get anything at all out of it, not even enough to power the LEDs.
OP - Seems to me the battery and trigger are working, there's power there to run the LEDs and the trigger turns them on. Leaves me to think it's the motor. I'd open it up and get a multimeter on the pos and neg terminals of the motor then depress the trigger and make sure there is a voltage getting to the motor terminals. If yes, it's the motor. If no, it's the controller PCB.
The motor in these drills is a sealed unit, so you can't replace parts inside it, it's a whole new motor job. Looking at the first result, a replacement will set you back £35 before any postage.
A replacement PCB is £60 before postage.
My advice would be to sell the battery and charger and bin the drill; this is why I never buy tools I can't try first (unless I have protections such as what ebay offer), they're more often than not, duffers.
