Cpu fan error f400

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • sanjayalk1
    Technician
    • Feb 2019
    • 10
    #1

    Cpu fan error f400

    Hi,
    I have this error
    Cpu fan error. F400
    From Toshiba eStudio 256SE

    I replaced the cpu fan but still error comes in boot and cant do anything
    But service mode are working 0+8

    Need help ...
    Tags: cpu, error, f400, fan
    • blackcat4866
      Master Of The Obvious

      Site Contributor
      10,000+ Posts
      • Jul 2007
      • 22996
      #2
      Re: Cpu fan error f400

      There isn't much to it: The system board fan, the system board & (2) connectors (CN112 & a union). That's it.

      Are you getting 24vdc at the fan connector?
      AFAIK there is not a 03 mode to test that fan motor. It runs constantly whenever the machine is on.
      Are you sure that it's the system board fan M6 that you changed?: It's here:

      M6 system fan.jpg
      =^..^=
      If you'd like a serious answer to your request:
      1) demonstrate that you've read the manual
      2) demonstrate that you made some attempt to fix it.
      3) if you're going to ask about jams include the jam code.
      4) if you're going to ask about an error code include the error code.
      5) You are the person onsite. Only you can make observations.

      blackcat: Master Of The Obvious =^..^=

        Comment

        • sanjayalk1
          Technician
          • Feb 2019
          • 10
          #3
          Re: Cpu fan error f400

          Originally posted by blackcat4866
          There isn't much to it: The system board fan, the system board & (2) connectors (CN112 & a union). That's it.

          Are you getting 24vdc at the fan connector?
          AFAIK there is not a 03 mode to test that fan motor. It runs constantly whenever the machine is on.
          Are you sure that it's the system board fan M6 that you changed?: It's here:

          [ATTACH=CONFIG]54265[/ATTACH]
          =^..^=
          Thank you for reply,

          The fan change is m6 yes

          Tomorrow i can check voltage of giving to fan power connector and let you know

          Thanks

            Comment

            • sanjayalk1
              Technician
              • Feb 2019
              • 10
              #4
              Re: Cpu fan error f400

              Hi

              I checked voltage and cn112 connector comes 9.3vdc
              Fan voltage not 24vdc it shows 12vdc

              If anyone have circuit diagram manual i can check why 12vdc not create on connector cn112

              Thanks...

                Comment

                • blackcat4866
                  Master Of The Obvious

                  Site Contributor
                  10,000+ Posts
                  • Jul 2007
                  • 22996
                  #5
                  Re: Cpu fan error f400

                  It's unlikely to be a power supply. I'd say your best chances are with the system board.

                  There's an odd chance that you've got a dead short or pinched wire in another component that's running off the same power supply lead. The next thing to do is determine which other components share the same connection to the power supply and disconnect those, to see if your supply voltage comes back up. =^..^=
                  If you'd like a serious answer to your request:
                  1) demonstrate that you've read the manual
                  2) demonstrate that you made some attempt to fix it.
                  3) if you're going to ask about jams include the jam code.
                  4) if you're going to ask about an error code include the error code.
                  5) You are the person onsite. Only you can make observations.

                  blackcat: Master Of The Obvious =^..^=

                    Comment

                    • sanjayalk1
                      Technician
                      • Feb 2019
                      • 10
                      #6
                      Re: Cpu fan error f400

                      Hi
                      I think this is not power problem, bcaz we gave 12v separately to the fan power and checked , still same error.
                      I think fan signals not sent to correct path , to control ic.

                      If anyone have circuite diagram of 256se it will help a lot to find the problem...
                      Thx.

                        Comment

                        Previous template Next
                        Working...