IR Advance C7055 E748-2042

[thadwald]

The C7055 was stuck and a reset showed a black screen with the error message:
E748-2042

The manual indicated that it is one of
Hard drive
Main Controller 1
Main controller 2

Box test refuses to run


I pulled the HDD and it checked OK using Seagate SeaTools.

I swapped MCON 1 from a junked C7065, transferring all components from the original board, as per the manual.
• DDR2-SDRAM (2 pc.)
• Flash PCB
• TPM PCB

Now box test runs and returns OK.

Machine now boots but halts with error
E355-0004

This indicates a serial number mismatch between several components. Resetting the error from level 3 menu doesn't clear the error.

Question. Is it possible to swap a used Main Controller Board 1 from a C7065 to this C7055? Is there a certain procedure for doing so?
If I install a new Main Controller Board 1, is there a certain procedure for installing it? The manual indicates only that I need to transfer DDR, Flash PCB, and TPM PCB.

Please advise

Thanks.

[20 year tech]

the main controllers 1 are different

7055 p/n FM4-0746-000

7065 p/n FM4-0745-000

[nicknt82]

The C7055 was stuck and a reset showed a black screen with the error message:
E748-2042

The manual indicated that it is one of
Hard drive
Main Controller 1
Main controller 2

Box test refuses to run


I pulled the HDD and it checked OK using Seagate SeaTools.

I swapped MCON 1 from a junked C7065, transferring all components from the original board, as per the manual.
• DDR2-SDRAM (2 pc.)
• Flash PCB
• TPM PCB

Now box test runs and returns OK.

Machine now boots but halts with error
E355-0004

This indicates a serial number mismatch between several components. Resetting the error from level 3 menu doesn't clear the error.

Question. Is it possible to swap a used Main Controller Board 1 from a C7065 to this C7055? Is there a certain procedure for doing so?
If I install a new Main Controller Board 1, is there a certain procedure for installing it? The manual indicates only that I need to transfer DDR, Flash PCB, and TPM PCB.

Please advise

Thanks.

Because of different model , so you must replace maincontroller1,2 and all of small pcb at sametime, Some small PCB not place on Maincontroller, but somewhere on machine