HO523 Theory of Operation

this section describes how specific components operate on the ho523 on board leds there are four on board leds that indicate the following led indication green file system activity ( bsy ) flashes any time there is file system activity (on any storage device) green power ( pwr ) displays when the board is powered up and not in reset mode flashes during firmware update process blue wifi ( wifi icon ) flashes when the player is connecting to the wireless network displays when connected red status ( err ) flashes a certain number of times to indicate which error is occurring the flash codes are described below 2 unspecified error 3 network recovery script is preparing to run on a device configured for network recovery 4 no upgrade file found 5 failed to load kernel module 6 board is not capable of running the current firmware version 7 a piece of on board hardware is not working correctly 8 problem related to the storage device (either the usb drive or microsd card) 9 problem related to the registry/nand 10 the autorun script encountered a load/run error 11 wifi related error 12 unable to find a bootable image on board switch the on board switch is connected to the gpio12, which is pulled low when the service (svc) button is pressed conversely, a pull up on the button normally sets the gpio12 to be pulled high reset switch / gpio button the on board switch is connected to the reset circuit pressing down the reset button will send an initial signal to the system software, and holding the reset button low for approximately 4 seconds will cause a hard reset microsd slot the ho523 has one microsd slot, which supports transfer modes up to uhs 1 ddr50 (50mb/s) there is no inherent limit on the storage capacity of microsd cards used with the player wireless module the ho523 has an internal m 2 slot for installing a compatible wireless module the m 2 wireless module connects via cable to a single external, attachable wireless antenna