TruAudio TRU-S500DSP - Standby Relay Issue

Hi all,

I’m trying to troubleshoot an amp that can’t switch from standby mode into regular power mode. The amplifier works fine if I disable the auto standby; however, if auto standby is enabled, the relay successfully switches into standby after a predetermined period of time but can’t switch back out of it. I’m assuming it’s either a failed relay switch or diode on the amp or power supply board. Any suggestions on where to start? Appreciate the help.
 

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