The other night, I suddenly have a flash (pun intended) to try to switch the reflector between my Jetbeam PA40 and my Fenix LD40. Please, no comments on the idea
Without any knowledge, I took the head of the PA40, unscrew the 2 littles screws and tried to move the unscrew the “heat sink”. After a few try, I failed to move anything, so I put back the 2 screws and assemble back the flashligh and BANG, nothing. Tried to switch a few parts between the LD40 and PA40. Seem related to the head of the PA40.
Sorry, how may I do that?
I tried pushing the battery holder against the LD40 head and it light up. I did it with my E40, and it light up too. But with the head of the PA40, nothing
By the way, I scare of the word “worst” in your post :Sp
Ok, this means it may get a bit more complicated. So can you remove the reflector so as to access the LED? You should see something vaguely resembling this.
You need to take a 18650 battery (or CR123-anything around 3-4 volts) and attach wires to the end of it. (Just tape them on) then touch those to the wires on the flashlight.
If the LED lights up then it may be a driver problem if it doesn't then all you need to do is a LED swap.
The pill/heatsink inside the head of the PA40 is firmly glued in place (as is the one inside the LD40, I tried to unscrew it in both models and broke my favorite pliers in the process :( ) so you probably need something much stronger to loosen it. I gave up eventually not wanting to break them.
Those two little screws you're referring to have nothing to do with securing the pill/heatsink inside the head but hold a plastic ring in place and secure the springs that make contact with the PCB of the battery carrier: one spiral spring in the center and two leafsprings (if that's the right word) at the circumference (don't have the light in front of me right now, I hope my memory serves me right).
My best guess is that you compromised the connection of the contact springs to the head's PCB when you put back those screws, so I would take it apart again and check if the springs make sufficient contact (I assume you have a DMM) when reassembling it.
With a DMM you can check if the springs have proper connection to the PCB board in the head (under the plastic disc that is held down by the two screws)
Back from work and looking at my PA40 right now I have to ask a probably dumb question: I hope you tried to open the head by inserting the pliers into the holes in the red heatsink and not into the holes of the two screws...?
So can you remove the reflector so as to access the LED? You should see something vaguely resembling this. 