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order id: 88829386454209
December 31st 2017

@m5stack
Yes it worked for a few days, and then it intermittently started going white; and now it is always white.

@keptan
We managed to fix it
simply holding down button A and reset button until Arduino ide attempted to connect
then releasing it and allowing it to upload without a chance for the old code to run

After inadvertently uploading a sketch that outputs to wrong pin numbers one of our M5 stacks has become un-uploadable. That is whenever it's given power the speaker emits loud continuous buzzing and the hardware won't show up as a serial port.

Is there anyway to force hardware into an uploadable state and reset.
Hardware is original M5 stack without 4mb psram

Starting as an intermittent issue and now permanently the lcd display is now only showing brightness as output, for example when running the FactoryTest.ino you can see the brightness come up and down for displaying the M5stack logo; but no actual picture output.

Here is what it looks like; as you can see just white.
This is running the FactoryTest.ino

Anyone had this problem or know any fixes?
Hardware is M5 with 4mb psRam