Well, I talked to the service department at Teac. The recorder has a one year warranty on the parts, which still applies to my recorder. The labor warranty (90 days) has expired. I shipped it to Teac in Montebello, CA for repair. They say I should have it back in two weeks. I'd like to have it back for the two moe shows the first weekend in February in Denver.
I also called Chris at the Sound Professionals where I bought it. He said he may be able to help expedite the repair process for me as he has a good relationship with the Teac sales rep. I'll report back on how it goes with Teac repair.
Update on my DR-680 repair:
It arrived at TEAC repair in Montebello, CA on 01-19
I called yesterday (01-24) for a status update. The gal on the phone told me the tech was looking at it.
I called today 01-25 and was told that the main board was bad. The cost (labor) to fix was $120. She said they can have it shipped out by Friday 01-28. They ship via FedEx 3 day. So, I will have it back for the Denver moe shows.
The technician didn't say why the main board was bad. So far, that works for me. I'll call Friday to make sure it did ship.
I'll just be happy to have it back.
I'll update again when the recorder is in my hands.