I am in the same boat. With help faulty capacitors were replaced. That took care of a U99 error. I had purchased a new hard drive as thought that might be the problem. It looks like it is. When turned on we get "no firmware" notices now. This is with original hard drive and new one. Firmware must have been damaged. I contacted Panasonic and was told I need to send it to customer service. The charge to repair is $255. I feel certain it is a matter of downloading firmware, so these seems high. Is firmware available?