My analog wireless computer is displaying no speed or erratic data.

CC-RS100W,CC-PA110W,CC-PA100W,CC-RD310W,CC-RD310W-U,CC-MC200W,CC-VT235W,CC-VT230W,CC-SC100B,CC-PA500B,CC-PA400B,CC-RD410DW

Speed / Cadence / Heartrate is flashing.

CC-PA400B,CC-RD410DW,CC-SC100B,CC-PA500B,CC-RD500B