Is Channel D audio gone out of business?

@skkmber 

I dont know if you managed to fix your Lino,  but yes that cliking sound is most likely the battery.  The replacement battery is a Powersonic PS-4100 Sealed Lead Acid Battery, you wont be able to close you lid anymore and the pins are less wide so you might have to tighten them, in my case I had nothing to do with the connectors, it was a nice and tight fit. 

@charob 

Thank you so much for the response and for your helpful advice. I will go ahead and order the replacement battery and hopefully that will fix the issue. 
Thanks again!

I picked up a used VDH Grail SB after MFremer said a used Grail was a sonic bargain

Michael Fremer wrote an obituary for Rob Robinson back in January which I missed: https://trackingangle.com/features/rob-robinson-rip

In the Q & A section, there is  information regarding the status of Channel D.