M5000 shows 'Serial information mismatch' in the display


My M5000 screen says Serial information mismatch. What do I need to do to get my M5000 working again?


The code string the M5000 shows is an error code string.

The reason for this error message can be a bad battery, bad connections between the battery and the RAM chip or even a very heavy electronically noise pulse might have corrupted the RAM. 

It is a good idea to check the battery soldering and the battery voltage. The voltage should not be less than approx. 2.7 VDC.

Step 2 should be handled only by a qualified electronic technician:

  1. Turn off the unit.
  2. Open the lid and check the backup battery - it should give you 3V. If it's below that, replace it - it's a CR2032 with 3 vertical soldering pins. The battery is soldered - not on a battery holder - so the replacement should be done by a qualified technician only.  
  3. Power on again, write down the code and send it to the TC Support Team, along with the serial number of the unit. We will provide a repair code that should re-initiate the serial number of the unit. While waiting for the code, do not power off the unit!

Optional licenses:  If you still have the old license codes, you'll be able to re-enter them. If you have lost the license codes, specify which licenses were active and we will re-issue the license codes.

Please get in touch using the tab above, and supply the following information:

  1. The code shown on the display
  2. The serial number of the M5000 : e.g."281478"

Do not enter anything on the M5000 before you have received the repair code from us.
After getting the repair code please follow the instructions below :

  1. Please reboot the M5000.
  2. Verify that the error code is identical to the error code string you have informed to us. -If not please contact us again.
  3. Press DO twice when it shows the "Serial information mismatch.." message
  4. Enter the repair code which you have , press DO
  5. Enter the serial no, press DO.

Please note:

  • RAM presets are lost (if you haven't made a regular back-up on card or floppy). 
  • Eventually MD-2 license(s) need to be re-installed. See here how to do it.

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