# After untethering XRP, pushing the left reset button doesn't run last downloaded code
**URL:** https://xrp.discourse.group/t/after-untethering-xrp-pushing-the-left-reset-button-doesnt-run-last-downloaded-code/309
**Category:** Support
**Created:** [April 3, 2024, 4:12pm UTC](https://xrp.discourse.group/t/after-untethering-xrp-pushing-the-left-reset-button-doesnt-run-last-downloaded-code/309 "2024-04-03T16:12:55Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@mackawoman](https://xrp.discourse.group/u/mackawoman)
#### Post date: [April 3, 2024, 4:12pm UTC](https://xrp.discourse.group/t/after-untethering-xrp-pushing-the-left-reset-button-doesnt-run-last-downloaded-code/309/1 "2024-04-03T16:12:55Z")
I’ve been trying some simple code on the XRP to understand how it works – run drive train motors at a constant speed, I thought once I downloaded some code, I could untether the robot, push the small black reset button on the left-hand side of the development board, and see the code run. I just get a periodic clicking sound as if a motor is turning on and off. When tethered and I click the RUN button in the code editor, the code runs fine, as expected. However, when I detach the usb cord from the robot and hit reset, the robot motors don’t spin. Is there something I’m missing or don’t understand how to run a program when the robot isn’t tethered?
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### Author:  [@Fgrossman](https://xrp.discourse.group/u/Fgrossman)
#### Post date: [April 3, 2024, 5:03pm UTC](https://xrp.discourse.group/t/after-untethering-xrp-pushing-the-left-reset-button-doesnt-run-last-downloaded-code/309/2 "2024-04-03T17:03:39Z")
The first thing I would check would be the batteries. When you are plugged in to the USB cable the power is coming through there. When unplugged it is just the batteries.
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### Author:  [@mackawoman](https://xrp.discourse.group/u/mackawoman)
#### Post date: [April 3, 2024, 5:36pm UTC](https://xrp.discourse.group/t/after-untethering-xrp-pushing-the-left-reset-button-doesnt-run-last-downloaded-code/309/3 "2024-04-03T17:36:11Z")
Thank you for making me try the obvious. I was a bit surprised that solved the problem. I had started with brand new AA batteries yesterday and used the robot for several hours yesterday playing with the web server code. When I tested the those batteries with the multi meter, they all registered 1.1v. I popped in 4 new AAs (multi meter read 1.6 for each) and the problem resolved. I definitely will need rechargeable AAs!