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Track down a number of hardware issues using the Nook HD troubleshooting page.
Identification and Background
The Nook HD is also marketed as the NOOK HD - they are the same product. The Nook HD is one of two 3rd-generation Nook color tablet e-reader devices, released in both an 8 and 16 gigabyte version. It is offered in two colors, Snow (white) and Smoke (black-grey.) The Nook HD can be distinguished from the Nook HD+ due to its smaller 7'' screen.
This device is moderately easy to repair.
Released: November 17, 2011
Major Hardware Features
CPU: ARM Cortex-A9 dual-core 4470 @ 1.3 GHz
Memory: 1 GB RAM
Storage: 8 or 16 GB with microSDXC expansion up to 64 GB
Display: LED Backlit Screen
Wifi Capable: Yes
Operating System: Android 4.0.3
Components Inside the Box
Nook HD 8GB or 16GB
Quick Start Guide
Won't Turn On
Lines through screen and/or dead pixels