I have a code error c4101 in minolta 350 bizhub

Does the machine come to ready state? and if it does, does the code blow as soon as an original in placed in the df or the start button is pressed?
Make sure you have 2 ribbon cables and one connector running through back of machine from PH unit. Also make sure you have the correct ph unit installed.

Here this is straight from Konica ...
C4101 code at power up.
Description:
C4101 code at power up.
Solution:

PROBABLE CAUSES:
1. Failed PWB-A (Mechanical CB).
Replace the PWB-A board (p/n 4040 0101 03).

2. No 24V DC at PJ17A, pin 5.
Replace the 3.15A fuse located on the power supply.

3. Polygon motor in the Print Head Assembly fails to turn.
Begin by checking the connections to the Print Head Assembly. Unplug and reseat all connections. If issue continues, replace the Print Head Assembly (p/n 4040-0751-00).

C-4101 (C4101) at power up.
Description:
C-4101 at power up.
Solution:

CAUSE: Failed BCRS board.

SOLUTION: Replace the BCRS (p/n 4551 2033 01 for bizhub 350 and p/n 4551 2034 01 for bizhub 200/250).

G.L.