CC164 (C4751i)PostedJune 11, 2025ByEric Ditges You are here: KB Home 4751i/4750i/4051i/4050i - Trouble CC### CC164 (C4751i) Contents Trouble typeCC164: ROM contents error (MSC)RankCTrouble detection conditionThe wrong model of firmware is detected in the CPU board when the main power switch is turned ON.The machine type information (Machine, Type) registered to the machine differs from the actual machine type.Trouble isolation–Relevant electrical partsStorage board (STRGB)CPU board (CPUB)Base board (BASEB) Procedure Check the ROM version. Check the machine type information registered and reenter as necessary. For details the machine information, see “Entering the machine type information”. Rewrite the firmware. Replace CPUB. Replace STRGB. Replace BASEB. If the above actions do not solve the problem, contact KM. (Link to the Field Service Manual)