# IRB6400 M94A(/2.4-150 S)

**URL:** <https://tech-community.robotics.abb.com/t/irb6400-m94a-2-4-150-s/11861>\
**Category:** Robot Controller\
**Created:** [April 7, 2025, 5:44am UTC](https://tech-community.robotics.abb.com/t/irb6400-m94a-2-4-150-s/11861 "2025-04-07T05:44:43Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![vaishnav009](https://avatars.discourse-cdn.com/v4/letter/v/13edae/32.png) [@vaishnav009](https://tech-community.robotics.abb.com/u/vaishnav009)\
**Post date:** [April 7, 2025, 5:44am UTC](https://tech-community.robotics.abb.com/t/irb6400-m94a-2-4-150-s/11861/1 "2025-04-07T05:44:43Z")

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Hi

I am Vaishnav Kuriyakattil and i am currently working on IRB6400 Robot, as it is an old one i cannot connect it to my pc ,so the only way i think is through teach pendant, so when i turned it on, it was showing guard stop state, and axis not commutated, and it was showing to replace the robot computer or serial measurement board, So i checked both the batteries and the 7.2v battery attached to SMB was dead and when i was checking the voltage of 3.2v battery, i accidentally took the positive wire from it, so now in the teach pendant it is showing to insert the boot disk(1). This controller has USB slot, not the floppy disk slot.  
so i don’t have the boot disks with me, so if anyone have the disks, could you please sent me , it is really important.

my mail id is [vaishnav@mondrelog.com](mailto:vaishnav@mondrelog.com)