Using contact cleaner in tube sockets

Were the 6922 individually numbered showing which tube socket they were to  be plugged into? Look near the base of the tubes for V1 through V8. If marked install tubes per diagram in owner manual.

Power tubes should be marked as well. (They are easy to bias if they are not though)
 
http://www.audioresearch.com/ContentsFiles/VT100II_Manual.pdf

Jim

There's no indication they were purchased from ARC and there are no markings. The 6550cs are Svetlanas and the 6922s are Electro-harmonix.
I will have to start with contacting the seller.

 Do you have an ARC dealer within a reasonable distance? If so I would ask him to have a look and see what he thinks. If he is a nice guy, he will help you figuring his good will may earn him a customer in the future. He should be able to check the bias.It could possibly be a bad driver tube. But it could also be something else like a bad cap. 

 I would take any sellers claim of tube life or new tubes with a grain of salt. When I buy a piece I always assume it will need new tubes. If the tubes are bad or not closely matched and you send it to ARC for repair. The first thing they will do is replace all the tubes. ARC tubes are expensive and can really add to the price of a repair. That is why trying to see if an ARC dealer will help is the first thing I would try. Maybe even buy replacement 6922 tubes from a reputable dealer and ask the ARC dealer to install and bias them. Even if there is a small charge it would be cheaper then sending the unit back to ARC. I buy my tubes from Jim McShane. He burns his tubes in a bit before matching them just like ARC. 

 Good luck, I hope it is something simple that can be easily fixed.

Try cleaning the tube pins. Make sure the bottom of the tube (the glass) is clean as well. Use your cleaner and a Q-tip to scrub the tube pins.