[drh4683]

Bill R. has a good point. HK shorts can cause some wierdo problems especially in the tuner. Sometimes in the IF stages too.
But do check those filter caps. Since those caps you replaced failed to correct the job, one of the other(s) filter caps may very well be causing this flag waving symptom. Since bridgeing over the caps revealed nothing, it tells me one of the caps is leaking badly. Bridging over a leaky cap wont tell you anything, only when a cap is open, or changed in value will that work. (I originally suspected either open or changed value cap)

What you will need to do cut (or desolder) one lead at a time to each leg of the filter caps. Then use your VTVM (or whatever kind of meter you have) and set it to RX1 and test from ground to the cap. IF the needle goes up and or barely goes down, the cap is leaky and is defective. Reverse the leads and check again to see if you get the same results.

If no meter movement in RX1 mode, the cap is probably good. Set the meter to RX100 and check, A good cap will cause the meter to rise and fall rather quickly, and when you reverse the leads, the meter needle will peak off the scale and fall back down.

If you find a bad cap in a can, you can easily recap. in this case its best to recap all the filters since you are watching the set all the time.
If you order individual axial caps, twist all the negative leads together and then solder that to a ground lug (the lug that holds the original filter can to the chassis is good ground terminal) then just cut the wires to the original filter can and solder those wires to the corresponding values of the new cap. Thats it.

Give the test a try though and tell us what you come up with, then we will go from there. Good luck-Doug