D D i i s s c c o o n n n n e e c c t t t t h h e e p p o o w w e e r r o o r r e e l l e e c c t t r r i i c c a a l l s s h h o o c c k k m m a a y y o o c c c c u u r r . .

L L o o w w e e r r i i n n g g t t h h e e c c o o n n t t r r o o l l b b o o a a r r d d e e x x p p o o s s e e s s t t h h e e t t e e c c h h n n i i c c i i a a n n t t o o 2 2 4 4 0 0

V V A A C C e e l l e e c c t t r r i i c c i i t t y y i i n n s s i i d d e e t t h h e e f f r r y y e e r r . .

5 5 . . 4 4 U U S S B B P P o o r r t t R R e e p p l l a a c c e e m m e e n n t t

The USB port is typically replaced after a software update fails with the assumption

the port is bad. There are multiple failure points in the circuit that can cause the

update process to fail. Before replacing the external USB port attempt a software

update using the internal USB port located on the control board. A short jumper wire

connects the external USB port to the internal USB port, ensure it's connected and

intact. Corrupted, out of date or incorrect versions of the files on the USB drive can

also cause an update failure.

1. Perform the removal procedure from

5.2 Control Board Replacement ,

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