Richfunb,
The symptoms you describe are exactly like my HR24-100 exhibited about 8 weeks ago. I was getting an error code of 14-xxx. Customer service made me run through a series of reboots to confirm that the receiver was really acting up. Once they were convinced that the receiver was, in fact, bad I had a replacement the next day. Interestingly enough, my replacement HR24-500 did the same thing about 4 weeks later. This time I had an error code 15-xxx. The customer service person did not make me do the additional tests and just sent a replacement receiver. It arrived in 2 days. I just can't believe the excellent service D* provides on replacement receivers.
Just a heads up on entering a diagnostic code when you are prompted by the automated telephone menu; you only enter the first two digits of the error code. I kept trying to enter all 5 digits and the automated phone system kept refusing to accept the code.
As for any charge, it seems to depend on your service and credit score. When you look at your statement on the DirecTV website you see that the "shipping charge" is dependent on your credit score. That same message never appears on the paper copy they send you in the mail. So, your experience may vary from some of the posts you read on this forum. Mine did.
Bob