Zebralight H501 Red issue

[Cemoi]

Hi all,
I have a H501R (red emitter) which worked fine so far.
Suddenly it stopped working : did not light up at all. It has not fallen down, no shock, no water, nothing special.
So I cleaned the contacts, and put it a fully charged NiMH : worked again sometimes, but with an erratic behaviour.
Tried a fresh primary Alkaline : again erratic behaviour. Same with a fresh primary Lithium.
What I call "erratic behaviour" is:

• Sometimes after the battery change I see the very short and bright usual flash when tightening the tailcap, and then it works normally.
• On other battery changes the LED will turn on permanently but very faint. Any action on the switch (either short or long click) does not turn out the LED, I need to unscrew the tailcap to make it go off.
• Sometimes on battery change the LED glows dim for a fraction of a second, then turns off. One click will turn it on again for a few seconds (very dim) then out.
• Sometimes it will not turn on at all, I don't even see the initial brief flash.

It doesn't seem to be correlated with the battery type (NiMH, Alkaline, Lithium), i.e. I can see different behaviours with one given battery type, or the same behaviour with different battery types.
Thanks in advance for your suggestions.

 

[AstroTurf]

My guess, bad board, and a trip to Zebralight for repair...

Hi all,
I have a H501R (red emitter) which worked fine so far.
Suddenly it stopped working : did not light up at all. It has not fallen down, no shock, no water, nothing special.
So I cleaned the contacts, and put it a fully charged NiMH : worked again sometimes, but with an erratic behaviour.
Tried a fresh primary Alkaline : again erratic behaviour. Same with a fresh primary Lithium.
What I call "erratic behaviour" is:

• Sometimes after the battery change I see the very short and bright usual flash when tightening the tailcap, and then it works normally.
• On other battery changes the LED will turn on permanently but very faint. Any action on the switch (either short or long click) does not turn out the LED, I need to unscrew the tailcap to make it go off.
• Sometimes on battery change the LED glows dim for a fraction of a second, then turns off. One click will turn it on again for a few seconds (very dim) then out.
• Sometimes it will not turn on at all, I don't even see the initial brief flash.

It doesn't seem to be correlated with the battery type (NiMH, Alkaline, Lithium), i.e. I can see different behaviours with one given battery type, or the same behaviour with different battery types.
Thanks in advance for your suggestions.

 

[Cemoi]

a trip to Zebralight for repair...

I wrote to them, and they replied (very quickly :twothumbs) that they "no longer have the parts/components needed for repairing the H501 series lights".
Therefore RIP my dear H501R :mecry:

 

[AstroTurf]

They have the H502pr on sale...

I wrote to them, and they replied (very quickly :twothumbs) that they "no longer have the parts/components needed for repairing the H501 series lights".
Therefore RIP my dear H501R :mecry:

 

[Cemoi]

The switch was the culprit.
I force-removed the switch boot (which almost destroyed it : the outer thinner edge was partly torn in the process), sprayed some contact cleaner, let it dry for a while, and now it works normally :twothumbs.

So now the question is: how to replace the switch boot, which means:

1. Find a way to remove the metal bezel,
2. Find a (preferably GITD) replacement boot.