# Micro Dot pHat malfunction **URL:** \ **Category:** Support\ **Created:** [December 15, 2016, 8:42pm UTC](https://forums.pimoroni.com/t/micro-dot-phat-malfunction/3582 "2016-12-15T20:42:56Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![gwenulin](https://avatars.discourse-cdn.com/v4/letter/g/e8c25b/32.png) [@gwenulin](https://forums.pimoroni.com/u/gwenulin)\ **Post date:** [December 15, 2016, 8:42pm UTC](https://forums.pimoroni.com/t/micro-dot-phat-malfunction/3582/1 "2016-12-15T20:42:56Z")
Hi All - I recently acquired my second microDot pHat, the first behaved exactly as expected. The more recent pHat behaves, when executing the python code below, as follows: ``` from microdotphat import clear, show, fill, set_pixel clear() set_pixel(0, 0, 1) show() ``` ![](https://us1.discourse-cdn.com/flex016/uploads/pimoroni/original/2X/1/14e462f2348d65b56e631e43fb2c2d14835cf9d4.JPG) ``` from microdotphat import clear, show, fill, set_pixel, write_string, scroll clear() write_string('CCCCCC', kerning=0) show() ``` ![](https://us1.discourse-cdn.com/flex016/uploads/pimoroni/original/2X/e/e28a27774528f6caf20c8979782260c4b5f82895.JPG) ``` Soldering detail: ``` ![](https://us1.discourse-cdn.com/flex016/uploads/pimoroni/original/2X/6/6bd186b3a7567f02b01fc585ca58011b30efbe2e.JPG) ![](https://us1.discourse-cdn.com/flex016/uploads/pimoroni/original/2X/b/b5bc1091fc8ca2c9b77811f92835d7ebee2022d8.JPG) I suspect an issue with the first IS31FL3730, but I am not certain - any ideas or experiences would be helpful ! ---
**Author:** ![RogueM](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/roguem/32/311_2.png) [@RogueM](https://forums.pimoroni.com/u/RogueM)\ **Post date:** [December 15, 2016, 9:58pm UTC](https://forums.pimoroni.com/t/micro-dot-phat-malfunction/3582/2 "2016-12-15T21:58:45Z")
can you post the pictures inline, it’s not high resolution enough to tell much? but yes, the leftmost pair of matrices would be controlled by the rightmost chip on the back. ---
**Author:** ![gwenulin](https://avatars.discourse-cdn.com/v4/letter/g/e8c25b/32.png) [@gwenulin](https://forums.pimoroni.com/u/gwenulin)\ **Post date:** [December 15, 2016, 10:12pm UTC](https://forums.pimoroni.com/t/micro-dot-phat-malfunction/3582/3 "2016-12-15T22:12:22Z")
I originally tried to post the photos in-line - but was informed that new members could only post One image at a time ! Regards, ``` Gwen ``` ---
**Author:** ![RogueM](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/roguem/32/311_2.png) [@RogueM](https://forums.pimoroni.com/u/RogueM)\ **Post date:** [December 16, 2016, 12:00am UTC](https://forums.pimoroni.com/t/micro-dot-phat-malfunction/3582/4 "2016-12-16T00:00:06Z")
sorry, I should have thought that was the case. I have raised your forum status and that should hopefully allow you to post pictures without restrictions. ---
**Author:** ![gwenulin](https://avatars.discourse-cdn.com/v4/letter/g/e8c25b/32.png) [@gwenulin](https://forums.pimoroni.com/u/gwenulin)\ **Post date:** [December 16, 2016, 1:36am UTC](https://forums.pimoroni.com/t/micro-dot-phat-malfunction/3582/5 "2016-12-16T01:36:33Z")
Hi RogueM, Thank you for the status upgrade ! I will now update my posting … Regards, ``` Gwen ``` ---
**Author:** ![major\_tomm](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/major_tomm/32/9044_2.png) [@major\_tomm](https://forums.pimoroni.com/u/major_tomm)\ **Post date:** [December 16, 2016, 11:26pm UTC](https://forums.pimoroni.com/t/micro-dot-phat-malfunction/3582/6 "2016-12-16T23:26:42Z")
Can’t see much wrong with your soldering, in fact it’s some of the best I’ve seen on here for a while :) ---
**Author:** ![gwenulin](https://avatars.discourse-cdn.com/v4/letter/g/e8c25b/32.png) [@gwenulin](https://forums.pimoroni.com/u/gwenulin)\ **Post date:** [December 17, 2016, 5:36pm UTC](https://forums.pimoroni.com/t/micro-dot-phat-malfunction/3582/7 "2016-12-17T17:36:05Z")
Thanks for the compliment ! Do you see anything that might explain the issue ? Regards, ``` Gwen ``` ---
**Author:** ![sandyjmacdonald](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/sandyjmacdonald/32/393_2.png) [@sandyjmacdonald](https://forums.pimoroni.com/u/sandyjmacdonald)\ **Post date:** [December 20, 2016, 10:25am UTC](https://forums.pimoroni.com/t/micro-dot-phat-malfunction/3582/8 "2016-12-20T10:25:44Z")
Hi Gwen. Your soldering looks pretty good! I’d suspect that there’s a problem with that driver chip controlling the first two displays. We’ll get you sorted out with a replacement kit if you email [support@pimoroni.com](mailto:support@pimoroni.com) with details of your order. ---
**Author:** ![gwenulin](https://avatars.discourse-cdn.com/v4/letter/g/e8c25b/32.png) [@gwenulin](https://forums.pimoroni.com/u/gwenulin)\ **Post date:** [December 20, 2016, 8:32pm UTC](https://forums.pimoroni.com/t/micro-dot-phat-malfunction/3582/9 "2016-12-20T20:32:50Z")
Hi Sandy - Thank for your soldering compliment ! Thank you for the quick help, with this issue ! I don’t know whether you replace kits bought from another firm - this kit was purchased from the PiHut. In any case, the purchase info is attached. Regards, ``` Gwen ``` ---
**Author:** ![sandyjmacdonald](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/sandyjmacdonald/32/393_2.png) [@sandyjmacdonald](https://forums.pimoroni.com/u/sandyjmacdonald)\ **Post date:** [December 22, 2016, 10:37am UTC](https://forums.pimoroni.com/t/micro-dot-phat-malfunction/3582/10 "2016-12-22T10:37:51Z")
I see your support ticket has been picked up, so hopefully that’ll sort the problem. I’ll close this thread now. :-) ---
**Author:** ![sandyjmacdonald](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/sandyjmacdonald/32/393_2.png) [@sandyjmacdonald](https://forums.pimoroni.com/u/sandyjmacdonald)\ **Post date:** [December 22, 2016, 10:38am UTC](https://forums.pimoroni.com/t/micro-dot-phat-malfunction/3582/11 "2016-12-22T10:38:02Z")
Closed on December 22, 2016, 10:38am UTC