hold on - now I'm confused!
My CF74 is set to 1800.
On-Time: 413 Minutes
the battery indicator is blue and at about 80%
"While charge is added to it, the battery indicator will not increase during charge" - but there was/is a red led on the back of the DC which flashes while charging. This led isn't flashing. The DC does not turn on, while pluggin nor while plug into the computer. the DC isn't recognized by the log book software.
I tested 3 cables which work fine with my cell phone. I also tested different chargers - all work with the cell phones. Did again charge cycles for about 9hrs - nothing.
I still believe the contacts in the USB ports are corroded.