Hello,I am a retired mechanical engineer with 56 years in this business. I will go in depth with you, and up to a 6 hour time limit.
All I ask is please select the ***RATING LINK*** at the top of your page before leaving, that is the only way I am credited through the site.
Rating does not affect your charges nor ability to refund if not satisfied. If you can agree to that, lets continue by all means.
You are most likely correct that the control panel (printed circuit board) has gone bad and needs to be replaced.
However, these days it can cost as much for some of these repairs as a new unit costs.
The unit you have is good for 8 to 10 years or so, then they start falling apart.
Tell me about how old it is, and what size of space it cools, and what it cost at the time so that I can assess that range of issues for you please