<![CDATA[T-Beam Supreme only powers on with USB]]>Hello,

I've recently recieved a T-Beam Supreme (M) that will not power up when on batter power.

I've used the pins to check voltage, and I have

  • 4.19v on VBAT to GND
  • 0v VBUS to GND
  • 0v VSYS to GND

My electronics knowledge is quite limited, are there further troubleshooting steps I can take to identify the issue?

Thank you in advance for any suggestions and assistance

]]>https://www.community.lilygo.cc/topic/726/t-beam-supreme-only-powers-on-with-usbRSS for NodeSun, 07 Jun 2026 22:24:56 GMTSun, 15 Oct 2023 20:52:02 GMT60<![CDATA[Reply to T-Beam Supreme only powers on with USB on Sun, 07 Apr 2024 21:17:05 GMT]]>Did you find a solution to this?

]]>https://www.community.lilygo.cc/post/1646https://www.community.lilygo.cc/post/1646Sun, 07 Apr 2024 21:17:05 GMT<![CDATA[Reply to T-Beam Supreme only powers on with USB on Wed, 15 Nov 2023 03:53:10 GMT]]>Hi，
Can you measure the voltage at this point? Please connect the battery and measure the voltage at this point in the picture to see how much V it is.

15672276-f49b-44e3-af5d-d6fadfd767a9-image.png

]]>https://www.community.lilygo.cc/post/1407https://www.community.lilygo.cc/post/1407Wed, 15 Nov 2023 03:53:10 GMT<![CDATA[Reply to T-Beam Supreme only powers on with USB on Tue, 17 Oct 2023 01:23:04 GMT]]>@teastain2 Thank you Terry for taking some time to investigate!

Unfortunately the schematics are a bit above my head. Are there some pins or components on the board that you're recommending I test?

I should note that the device does not seem to recognize and charge the battery when it is installed. I am suspecting a hardware issue at this point, but would like to confirm.

]]>https://www.community.lilygo.cc/post/1278https://www.community.lilygo.cc/post/1278Tue, 17 Oct 2023 01:23:04 GMT<![CDATA[Reply to T-Beam Supreme only powers on with USB on Tue, 17 Oct 2023 00:42:50 GMT]]>@chaosaffe This just posted by another user:
https://community.lilygo.cc/topic/716/t-a7608-gsm-modem-does-not-work-in-battery-mode

]]>https://www.community.lilygo.cc/post/1277https://www.community.lilygo.cc/post/1277Tue, 17 Oct 2023 00:42:50 GMT<![CDATA[Reply to T-Beam Supreme only powers on with USB on Mon, 16 Oct 2023 03:56:54 GMT]]>@chaosaffe So, as I thought. hmm...Some LilyGO products need a special power on GPIO to be set, in order to get Battery Power. It stumps most people, including me, until someone figures it out!
Since you run the shipped-firmware, it can't be that.
It is very hard to even find a schematic for these, I'v been trying since yesterday.
I'll keep digging.
Please check here again for any updates.
I don't think '0v VSYS to GND' is correct and maybe the answer, IF either of us can find a schematic!
-Terry

P.S. OK, this might be it:
https://github.com/Xinyuan-LilyGO/LilyGo-LoRa-Series/blob/master/schematic/LilyGo_TBeam_S3_Core_V3.0.pdf
Here are some salient points.
The Power ON key to the APX power supply chip

Screenshot 2023-10-15 at 11.49.53 PM001.jpg

Screenshot 2023-10-15 at 11.51.10 PM002.jpg

And its hardware switch:

Screenshot 2023-10-15 at 11.51.34 PM003.jpg

]]>https://www.community.lilygo.cc/post/1275https://www.community.lilygo.cc/post/1275Mon, 16 Oct 2023 03:56:54 GMT<![CDATA[Reply to T-Beam Supreme only powers on with USB on Mon, 16 Oct 2023 01:57:15 GMT]]>@teastain2

I have not edited the firmware, the device is running v2.2.11 of the Meshtastic firmware.

]]>https://www.community.lilygo.cc/post/1274https://www.community.lilygo.cc/post/1274Mon, 16 Oct 2023 01:57:15 GMT<![CDATA[Reply to T-Beam Supreme only powers on with USB on Sun, 15 Oct 2023 21:11:56 GMT]]>@chaosaffe said in T-Beam Supreme only powers on with USB:

T-Beam Supreme (M)

Do you edit the firmware in Arduino IDE ?

]]>https://www.community.lilygo.cc/post/1273https://www.community.lilygo.cc/post/1273Sun, 15 Oct 2023 21:11:56 GMT