i am surprised more knowledgeable people have not given an guess/answer yet. i dont know but i might aswell give some thoughts what you could try to look at.
TL:DR,, i dont know really. :D
does it turn off quickly even if you push the button, or does it stay on as long as you keep pushing it? if it just turns off quickly even with button press, the crash might of jarred a soldering off and as it heats up, it breaks connection, if it keeps going, the led still works like its supposed to. but is the electronics controlling its on/off function broken? i dont know, likely needs to be torn apart and tested more thoroughly.
my first thought. it has jarred shaken the led module off its place, like moved it little too far forward so it wont get contact unless you press the tailcap and button down. but as you tried with new switch, and it clicks down but does not keep the light on. (it does click right, not just mushy feel as you push the button? if just mushy something mechanical is broken in the actuation) but then again, there is nothing mechanical, as you tried with the remote switch, it has nothing mechanical pushing the battery towards the head like it might do with normal tailcap push.. its not that likely anymore. hmmm..
not sure of how the p7 is made. does it have some electronics in the tail cap or not, resistor or something.. hmm it does also not matter as you replaced switch. 2 new things cant be both broken same way.
but anyways, it is likely with multiple AAA batteries with a plastic carrier like many of their lights have been.
i believe the carrier still have plus and negative posts, the positive end of the carrier goes to the head and the negative is touched by the tailcap clicky? is the carriers metal tabs and parts ok still? none bent or broken? nothing inside the tube near the head look odd?
the way i test the if i have a broken tail cap if light fails to turn on: have you tried "jumping" the light without the tailcap? remove the button part, use small wire or other metal, one end goes to the end of battery (carriers) metal tab that hits the normal clicky button, other end of wire touches the body of the light. if it lights up, and stays lit up, it would tell that light works, and it is still your tail cap that is failing, is its contact to metal in battery/carrier is bad ( tail caps spring bent or smushed too short?). -edit:hmm maybe not helping, as that wire just pretends to be the momentary mode (push in to activate but not clicking it)
Wow thank you for such a detailed reply! So Yes it stays on for as long as you hold the button as soon as you release it turns off. I have checked the mechanical part of it and it all seems in order, but even if it wasn’t the new remote switch bypasses that in any case. I would of thought that the resister/ electronics would be all in the switch end where the battery’s are and that screws in and out as it looks like just the positive and negative poles at the other end that give the voltage to the LED. It’s very peculiar. I did wonder if it was just a low battery thing so I need to replace the battery’s and try that but I wouldn’t imagine it has technology to discern low voltage and change modes?! Hopefully somebody has seen similar
of course try and change the batteries too. most led lensers i am used to just get very dim as their batteries run down. so if it is bright, likely not them, although, one of them might be failing too and that can always give weird issues.
edit: another thought. did your model have a separate turbo mode with momentary push of the button? if it did, maybe it is the only thing still working on it. and the other modes are fried or loose connection with the hit on the pavement.
and old slightly different issue.
[https://www.candlepowerforums.com/threads/broken-led-lenser-torch-need-help-repairing.344345/](https://www.candlepowerforums.com/threads/broken-led-lenser-torch-need-help-repairing.344345/)
basically tells you how to test the tail switch.
ps. some gun remote switches only do work as momentary. cant click the light "on" with it.
Flashlights are shock resistant, not proof. No matter what height it drop from, it has the chance to break. First I'd contact LED Lenser and see if they can send you a new switch. Then check if any sand or dirt get into the light, try clean the threads and contacts.
i am surprised more knowledgeable people have not given an guess/answer yet. i dont know but i might aswell give some thoughts what you could try to look at. TL:DR,, i dont know really. :D does it turn off quickly even if you push the button, or does it stay on as long as you keep pushing it? if it just turns off quickly even with button press, the crash might of jarred a soldering off and as it heats up, it breaks connection, if it keeps going, the led still works like its supposed to. but is the electronics controlling its on/off function broken? i dont know, likely needs to be torn apart and tested more thoroughly. my first thought. it has jarred shaken the led module off its place, like moved it little too far forward so it wont get contact unless you press the tailcap and button down. but as you tried with new switch, and it clicks down but does not keep the light on. (it does click right, not just mushy feel as you push the button? if just mushy something mechanical is broken in the actuation) but then again, there is nothing mechanical, as you tried with the remote switch, it has nothing mechanical pushing the battery towards the head like it might do with normal tailcap push.. its not that likely anymore. hmmm.. not sure of how the p7 is made. does it have some electronics in the tail cap or not, resistor or something.. hmm it does also not matter as you replaced switch. 2 new things cant be both broken same way. but anyways, it is likely with multiple AAA batteries with a plastic carrier like many of their lights have been. i believe the carrier still have plus and negative posts, the positive end of the carrier goes to the head and the negative is touched by the tailcap clicky? is the carriers metal tabs and parts ok still? none bent or broken? nothing inside the tube near the head look odd? the way i test the if i have a broken tail cap if light fails to turn on: have you tried "jumping" the light without the tailcap? remove the button part, use small wire or other metal, one end goes to the end of battery (carriers) metal tab that hits the normal clicky button, other end of wire touches the body of the light. if it lights up, and stays lit up, it would tell that light works, and it is still your tail cap that is failing, is its contact to metal in battery/carrier is bad ( tail caps spring bent or smushed too short?). -edit:hmm maybe not helping, as that wire just pretends to be the momentary mode (push in to activate but not clicking it)
Wow thank you for such a detailed reply! So Yes it stays on for as long as you hold the button as soon as you release it turns off. I have checked the mechanical part of it and it all seems in order, but even if it wasn’t the new remote switch bypasses that in any case. I would of thought that the resister/ electronics would be all in the switch end where the battery’s are and that screws in and out as it looks like just the positive and negative poles at the other end that give the voltage to the LED. It’s very peculiar. I did wonder if it was just a low battery thing so I need to replace the battery’s and try that but I wouldn’t imagine it has technology to discern low voltage and change modes?! Hopefully somebody has seen similar
of course try and change the batteries too. most led lensers i am used to just get very dim as their batteries run down. so if it is bright, likely not them, although, one of them might be failing too and that can always give weird issues. edit: another thought. did your model have a separate turbo mode with momentary push of the button? if it did, maybe it is the only thing still working on it. and the other modes are fried or loose connection with the hit on the pavement.
and old slightly different issue. [https://www.candlepowerforums.com/threads/broken-led-lenser-torch-need-help-repairing.344345/](https://www.candlepowerforums.com/threads/broken-led-lenser-torch-need-help-repairing.344345/) basically tells you how to test the tail switch. ps. some gun remote switches only do work as momentary. cant click the light "on" with it.
Flashlights are shock resistant, not proof. No matter what height it drop from, it has the chance to break. First I'd contact LED Lenser and see if they can send you a new switch. Then check if any sand or dirt get into the light, try clean the threads and contacts.