Latitude Service Tag

Hi!

I have replaced a defect mainboard with a used one and now i need to change the service tag back to original. System is dell E7440 LA-9591P. Is this possible only with kbc change?

 

Maybe trough KCB?


Update:
Found JDEG1 port KBC = MEC5075. I think first step is done...

 

Update #2
Done reading ;-)

Code:

MEC IDCODE: B1240020
Device ID: 12
Device Revision: 0
Device Status: C
Flash Status: 280000000C
Boot Block in protected mode
MEC IDCODE: B1240020
Device ID: 12
Device Revision: 0
Device Status: C
Flash Status: 280000000C
Boot Block in protected mode
Start erase in: 25.03.2018 14:58:52
End erase in: 25.03.2018 14:58:53
Erase OK

 

Update #3
It`s seems the service tag is not stored in the mec5075. Any further informations?

 

I`ve found an ECE5048. This one? But there is no pinout i can find in the schematic.

If there is a working solution i would also pay for VIP no problem!

 

SVOD2 ECE Mode

Code:

Software version 1.0.2.9 date 21.03.2018
Running Microsoft Windows 7 Professional  64 bit
Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz
Device connected in work mode
Firmware version 1.0.2.0 date 10.3.2018
MEC mode selected
MEC IDCODE: B1240020
Device ID: 12
Device Revision: 0
Device Status: C
Flash Status: 280000000C
Boot Block in protected mode
MEC IDCODE: B1240020
Device ID: 12
Device Revision: 0
Device Status: C
Flash Status: 280000000C
Boot Block in protected mode
Start erase in: 25.03.2018 14:58:52
End erase in: 25.03.2018 14:58:53
Erase OK
Start reading: 25.03.2018 14:58:58
End reading: 25.03.2018 14:59:00
CRC calculated 0
CRC stored FFFF
Read OK
MEC IDCODE: B1240020
Device ID: 12
Device Revision: 0
Device Status: C
Flash Status: 280400000C
Boot Block in protected mode
MEC IDCODE: B1240020
Device ID: 12
Device Revision: 0
Device Status: C
Flash Status: 280000000C
Boot Block in protected mode
Start erase in: 25.03.2018 14:59:20
End erase in: 25.03.2018 14:59:20
Erase OK
MEC IDCODE: B1240020
Device ID: 12
Device Revision: 0
Device Status: C
Flash Status: 290500000C
Boot Block in protected mode
Start erase in: 25.03.2018 14:59:32
End erase in: 25.03.2018 14:59:33
Erase OK
Start blank check: 25.03.2018 14:59:33
End blank check in: 25.03.2018 14:59:35
Blank Check OK
File size : 196608
Flash size :196608
Start writing: 25.03.2018 14:59:35
End writing in: 25.03.2018 14:59:38
Write OK
File size : 196608
Flash size :196608
Start verify: 25.03.2018 14:59:38
End verify in: 25.03.2018 14:59:40
Verify OK

The dump is attached ;-)

 

Success!

I was able to clear the MEC5075.

 

You can find the pinout in the schematic, JDEG1. I have attached an picture earlier.

 

SVOD2 JTAG EXTENDER...

 

1) EXTEDNER
The extender is only a combination of cheap china fpc to dupont adapter and self created 3d model printed in [email protected]. Nothing special. You need solder skills to put the dupont pins on the adater and also the fpc connector. In this case 10pin with 0.5mm pitch. You need also 10pin 0.5mm fpc ribbon cable. last part is to solder an fpc connector to the mainboard. Much easier way then to struggle around with single wires in 0.5mm pitches! You could also use the original keyboard connector from the svod2 package, but especially for this board my solution is much nicer to handle.


2) MEC5075
I have not figured out how this has happend 100% because the mec5075 is 256Kb and not 192Kb like my dump. This will be fixed in the SVOD2 Software hopefully during the next days. So i cannot explain how it was working for now. I will try it again with a fixed software version. But it seems to be a combination of erasing the mec and bring the bios to factory defaults ;-)

 

MEC5075/5085 Default Files:

Offset 0-1000 & 3FFFC-48000 could contain write errors during flashing, but the system should work! Don`t forget to make a backup for disaster recovery....