Picture problem in Crosley 9-408

[stuben]

I’ve had this set now for about three years. I replaced all the FP twist lock electrolytic capacitors as well as all the paper and wax capacitors a few years ago and the set has been working well. A few days ago I turned it on and the left side of the picture has a dark grey vertical bar that cuts off the picture. Also the rest of the picture looks washed out with poor contrast and little brightness as if it’s a weak CRT. I substituted a strong 10BP4 and got the same results. Also tried another 6BG6G with the same results. It’s all quite baffling because the set worked fine the day before. The chassis in this set is an RCA 630TS. I don’t own an oscilloscope and only have a digital multimeter. Any idea what is going on here and is there anything I can do to fix this problem?
Thanks for any suggestions!
Paul D.