iTP A3 Upgrade R5 stopped working suddenly

LED Flashlights – General Info 1 x AAA Flashlights
1

Hi, long time since I last posted here…

I have a rather old iTP A3 Upgrade R5 from c. 2011 that suddenly stopped working.
No light at all.

I checked the body with the head of another A3 I have and it works.
I checked the LED and the circuit visually without opening the flashlight’s head, also tried looking for shorts with a multimeter, but couldn’t see anything wrong,
I only used NiMH and lithium AAA, never li-ion or anything else more than 1.5V. Also, this flashlight didn’t see a lot of use during the years, was mostly a backup light for my wife.

Is there anything else I should try before trying to disassemble the head? It’s glued, I think, couldn’t screw it out easily anyway.

Thanks,
Haggai

2

What was the upgrade?

3

That’s just the name of the light.
I think it refers to it having three modes.

4

Loose ground on the driver maybe. Or one of the led wires popped loose.

5

Any way to test that without disassembling the head?

6

Wow this is an old light and I bought them from CPF years ago :slight_smile:

I rarely use it and I’m planning to modify it when I get back from holiday