[BrendaAnnD]

Try to check your input coils (antenna section) on the rear of the bandswitch. My 690 had open primaries on all 5 coils (of course, it had some help from an external voltage source..)

One quick way to check for potential problems there is to touch the cap of the RF amp tube. If you touch the antenna connection with your finger and get no static, then touch the cap of the RF amp with your finger and DO get static, this is a good indication of coil or bandswitch problems.