# PureThermal 3 issue **URL:** \ **Category:** Distance\ **Created:** [February 12, 2025, 11:44pm UTC](https://community.sparkfun.com/t/purethermal-3-issue/63365 "2025-02-12T23:44:23Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![SCI](https://avatars.discourse-cdn.com/v4/letter/s/ce7236/32.png) [@SCI](https://community.sparkfun.com/u/SCI)\ **Post date:** [February 12, 2025, 11:44pm UTC](https://community.sparkfun.com/t/purethermal-3-issue/63365/1 "2025-02-12T23:44:23Z")
I purchased PureThermal 3 - FLIR Lepton Smart I/O Board with Lepton FS (Packing List #10652217). When I connect it to computer, the BOOT indicator blinks long white flashes and computer cannot find it. I tried different computers and ports. I installed “Lepton User App” but this app couldn’t connect to the device. Can you help me please? ---
**Author:** ![TS-Russell](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/ts-russell/32/6092_2.png) [@TS-Russell](https://community.sparkfun.com/u/TS-Russell)\ **Post date:** [February 13, 2025, 1:58am UTC](https://community.sparkfun.com/t/purethermal-3-issue/63365/2 "2025-02-13T01:58:15Z")
Make sure the camera module is fully seated with all 3 locking tabs engaged (1 upper, 2 lower) and check for any obvious short/extra solder on the board…it may help to disconnect a re-seat the module altogether; any luck? ---
**Author:** ![SCI](https://avatars.discourse-cdn.com/v4/letter/s/ce7236/32.png) [@SCI](https://community.sparkfun.com/u/SCI)\ **Post date:** [February 13, 2025, 2:54pm UTC](https://community.sparkfun.com/t/purethermal-3-issue/63365/3 "2025-02-13T14:54:45Z")
No luck. All 3 locking tabs are reached. I don’t see any short/extra solder on the board. ---
**Author:** ![TS-Russell](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/ts-russell/32/6092_2.png) [@TS-Russell](https://community.sparkfun.com/u/TS-Russell)\ **Post date:** [February 13, 2025, 8:59pm UTC](https://community.sparkfun.com/t/purethermal-3-issue/63365/4 "2025-02-13T20:59:19Z")
It looks like [you might need to use Linux/Mac with that device](https://groupgets.com/products/purethermal-3) & software; are you? ---
**Author:** ![SCI](https://avatars.discourse-cdn.com/v4/letter/s/ce7236/32.png) [@SCI](https://community.sparkfun.com/u/SCI)\ **Post date:** [February 13, 2025, 10:23pm UTC](https://community.sparkfun.com/t/purethermal-3-issue/63365/5 "2025-02-13T22:23:00Z")
I don’t think so. > **[PT3%20Datasheet%20Rev2%20Oct%202022.pdf](https://groupgets-files.s3.amazonaws.com/PT3/PT3%20Datasheet%20Rev2%20Oct%202022.pdf)** > > 905.47 KB “Compatible applications include: • **FLIR Lepton Application for Windows (above image on left)**. • GetThermal for Mac OS and Linux (above image on right). • **VLC, and many other video players**.” ---
**Author:** ![TS-Russell](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/ts-russell/32/6092_2.png) [@TS-Russell](https://community.sparkfun.com/u/TS-Russell)\ **Post date:** [February 13, 2025, 10:38pm UTC](https://community.sparkfun.com/t/purethermal-3-issue/63365/6 "2025-02-13T22:38:06Z")
Ah, ok…their product page is confusing! Does it appear as a device in the software? Does a COM port show up when you plug it in? ---
**Author:** ![SCI](https://avatars.discourse-cdn.com/v4/letter/s/ce7236/32.png) [@SCI](https://community.sparkfun.com/u/SCI)\ **Post date:** [February 13, 2025, 10:51pm UTC](https://community.sparkfun.com/t/purethermal-3-issue/63365/7 "2025-02-13T22:51:22Z")
No. Nothing. It looks like the computer/system doesn’t see this device at all. One would think that it doesn’t work at all if it weren’t for the white flashing light on it. ---
**Author:** ![TS-Russell](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/ts-russell/32/6092_2.png) [@TS-Russell](https://community.sparkfun.com/u/TS-Russell)\ **Post date:** [February 13, 2025, 11:10pm UTC](https://community.sparkfun.com/t/purethermal-3-issue/63365/8 "2025-02-13T23:10:59Z")
I assume you tried swapping cables too? You might verify that a full 5v is being delivered to the board If nothing new happens; it is probably DoA - Was it purchased from us? If so head over to [Returns](http://www.sparkfun.com/returns) (contact vendor if purchased elsewhere) and we’ll get ya squared away ---
**Author:** ![SCI](https://avatars.discourse-cdn.com/v4/letter/s/ce7236/32.png) [@SCI](https://community.sparkfun.com/u/SCI)\ **Post date:** [February 14, 2025, 2:30pm UTC](https://community.sparkfun.com/t/purethermal-3-issue/63365/9 "2025-02-14T14:30:51Z")
Sure. I tried 3 different cables. Yep, we bought this device from SparkFun. We’ll make a return. Thank you. ---
**Author:** ![TS-John](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/ts-john/32/6093_2.png) [@TS-John](https://community.sparkfun.com/u/TS-John)\ **Post date:** [March 6, 2025, 8:47pm UTC](https://community.sparkfun.com/t/purethermal-3-issue/63365/10 "2025-03-06T20:47:41Z")
SCI, we received your return and ran a simple test via this cable and my Windows 11 machine: > **[Reversible USB A to C Cable - 0.8m](https://www.sparkfun.com/reversible-usb-a-to-c-cable-0-8m.html)** > > These 0.8m cables have minor modifications that allow them to be plugged into their ports regardless of orientation on the USB-A & C sides! It appears that this unit is functioning properly. The cable I used is nothing special. ![FLIR example](https://canada1.discourse-cdn.com/sparkfun/original/2X/7/7de8ef60514c5b6c35b26ed2289e5226bedc6d1e.jpeg) I am pretty puzzled that you had tried so many different computers and cables with no success. If you could reply to the Email you have going with our CS rep we can move forward from there. Thanks!