Firmware versions 1.8.x and 1.9 contained a bug where, on rare occasions, Pebble's MCU was not correctly reconfigured prior to entering shutdown. When this occurred it prevented button presses from waking up the Pebble. Firmware version 1.9.1 contains a fix that ensures the necessary reconfiguration is always performed before shutting down.
If you have experienced this issue, please follow the steps below to request a RMA for your unit:
1) Confirm you have tried to charge your Pebble for at least 3 hours and you have held down the Select button for 15-20 seconds to try to reboot. (http://cl.ly/image/0K2N2x3k3F0H)
2) Find "contact support" in your iOS or Android Pebble application or use the Email Us form.
3) Add a note within your email correspondence or in the subject line of your email: "Shutdown RMA" If you are a Kickstarter backer please also include your Pebble Account email address if you are not already using that email in your request. For all other customers please include the following information in your email: Name, Email, Shipping Address, and Pebble Serial number.
Our support team will contact you within 48-72 hours with instructions to process a RMA for your unit.