PowerTap Pro Error AP ldr - Firmware 2.21

Since 2001, over 90,000 cyclist's have joined Cycling Forums to discuss topics from general cycling to equipment, training, racing and travel or vacation destinations (especially in europe during the tour de france). We also feature an great deals in our online store, 100's of articles, classifieds and product reviews.

I tried to update my PTPro to the most recent firmware, but it was not successful and now the unit displays AP ldr :eek: I did a search on the site but did not find any solutions. I use a Serial-USB converter - my comupter is a Dell and it doesn't have a serial port. I've had no issues downloading prior to the firmware update. I decided to try a firmware update because the PT would mysteriously reset itself during a ride.