ADC

I am not sure this is where I am suppose to post a question, I just joined this group and am still trying to learn the site… So I am gonna try and if I am wrong just point me in the right directiom. I have a ADCOM GFA 7500 When I turn it on there is a clicking sound and the light on the On/Off button also blinks, it does this for about 2 mins then stops and will do it every so often unitl I turn it off…. I was not sure if it could be the On/Off switch or the relay…. any help would be appreciated….. It is also connected to a dim bulb tester and when it is clicking the light on the sim bulb tester also blinks just like the On/Off button… Thank you soooo much 🤙🏻
 
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