# Spark Core trying to flash infinite loop **URL:** \ **Category:** Troubleshooting\ **Created:** [September 12, 2014, 11:51pm UTC](https://community.particle.io/t/spark-core-trying-to-flash-infinite-loop/6929 "2014-09-12T23:51:19Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Rockvole](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/rockvole/32/20733_2.png) [@Rockvole](https://community.particle.io/u/Rockvole)\ **Post date:** [September 12, 2014, 11:51pm UTC](https://community.particle.io/t/spark-core-trying-to-flash-infinite-loop/6929/1 "2014-09-12T23:51:19Z")
I have been using my core every day, except today it stopped letting me flash it. I seem to have got stuck in a loop trying to fix it - this is what ive tried 3 times : factory reset flashing blue (not breathing) remove core from web app add core in phone app core flashes green no cores found in app unplug usb replug in usb flashing green * * * I also tried, putting into yellow flashing mode and : ``` spark flash --usb cc3000 ``` I have a few other cores which are still working fine. ---
**Author:** ![kennethlimcp](https://avatars.discourse-cdn.com/v4/letter/k/c0e974/32.png) [@kennethlimcp](https://community.particle.io/u/kennethlimcp)\ **Post date:** [September 12, 2014, 11:55pm UTC](https://community.particle.io/t/spark-core-trying-to-flash-infinite-loop/6929/2 "2014-09-12T23:55:23Z")
Try the patch again and resend the Wifi credentials ---
**Author:** ![Rockvole](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/rockvole/32/20733_2.png) [@Rockvole](https://community.particle.io/u/Rockvole)\ **Post date:** [September 13, 2014, 12:13am UTC](https://community.particle.io/t/spark-core-trying-to-flash-infinite-loop/6929/3 "2014-09-13T00:13:41Z")
Ooops - I meant to say I get no dfu device found when its flashing yellow. I tried it again right now but same result. Im flashing other cores no problem so I think my setup is all fine. ---
**Author:** ![kennethlimcp](https://avatars.discourse-cdn.com/v4/letter/k/c0e974/32.png) [@kennethlimcp](https://community.particle.io/u/kennethlimcp)\ **Post date:** [September 13, 2014, 12:26am UTC](https://community.particle.io/t/spark-core-trying-to-flash-infinite-loop/6929/4 "2014-09-13T00:26:31Z")
Hmmm… Weird. Are you on mac? 1.) Change another USB cable 2.) try dfu-util -l to check if the device is listed 3.) Use another USB port ---
**Author:** ![Rockvole](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/rockvole/32/20733_2.png) [@Rockvole](https://community.particle.io/u/Rockvole)\ **Post date:** [September 13, 2014, 5:05pm UTC](https://community.particle.io/t/spark-core-trying-to-flash-infinite-loop/6929/5 "2014-09-13T17:05:46Z")
I am on Ubuntu 14.04 I managed to get the CC3000 flash to work. ``` sudo spark flash --usb cc3000 ``` Now flashing yellow. ``` sudo spark flash --usb deep_update_2014_06 ``` Now flashing green. Try to connect wifi via app. No cores found. ---
**Author:** ![kennethlimcp](https://avatars.discourse-cdn.com/v4/letter/k/c0e974/32.png) [@kennethlimcp](https://community.particle.io/u/kennethlimcp)\ **Post date:** [September 13, 2014, 9:42pm UTC](https://community.particle.io/t/spark-core-trying-to-flash-infinite-loop/6929/6 "2014-09-13T21:42:00Z")
That’s super weird. Usually the patch would solve it! ---
**Author:** ![Rockvole](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/rockvole/32/20733_2.png) [@Rockvole](https://community.particle.io/u/Rockvole)\ **Post date:** [September 13, 2014, 11:30pm UTC](https://community.particle.io/t/spark-core-trying-to-flash-infinite-loop/6929/7 "2014-09-13T23:30:38Z")
I guess the only way to get further is with hardcore JTAG stuff ? I did get sent a JTAG shield, but I wouldnt know where to start. I think you need some other gadget too though to connect it to the PC? ---
**Author:** ![kennethlimcp](https://avatars.discourse-cdn.com/v4/letter/k/c0e974/32.png) [@kennethlimcp](https://community.particle.io/u/kennethlimcp)\ **Post date:** [September 13, 2014, 11:45pm UTC](https://community.particle.io/t/spark-core-trying-to-flash-infinite-loop/6929/8 "2014-09-13T23:45:28Z")
You will need a STlink v2 programmer but I don’t think it will help. Try a factory reset followed by cc3000 patch then send in wifi credentials again. Check that they are correct just to be sure 😉 ---
**Author:** ![Rockvole](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/rockvole/32/20733_2.png) [@Rockvole](https://community.particle.io/u/Rockvole)\ **Post date:** [September 14, 2014, 2:13am UTC](https://community.particle.io/t/spark-core-trying-to-flash-infinite-loop/6929/9 "2014-09-14T02:13:06Z")
Tried again - no dice. Thanks for your help - dont worry Ill put that in the pile of things to deal with later 😄