I’m sorry to hear about this issue with your new RS4D, and thank you for posting the helicorder and the logs from the Shake itself.
From them, it appears that, at the start, the Pi board was not able to see the blue Shake board above it:
2023 139 01:32:43: Unable to read Firmware version number off of Serial Port /dev/serial0 after trying for 15 seconds, cannot continue!
2023 139 01:32:43: Is the Pi computer connected to the Raspberry Shake Board? Please confirm and try again.
Furthermore, these lines in the logs, tell us that there is something going on between the boards and the sensors:
2023 139 01:29:58>> $ÁË1??IY ÙÆ?XEBe??QÒ?U???U?ÁÿÉÆwTBe??S:
2023 139 01:29:58>> Y??Ñò?E? ?+%ÁÊ1TVI0ÉÇÊS?Re??Se?E? ?7W?ÑÊ!?EIY ÙÆ?B?Be?øT[??ÉÇ7UBe??Y?
2023 139 01:29:58>> Y??Ö??E? ??a?ÑÊ!?fHY ÙÆG?Be??Sâ?U??fe?ÁË1VYI0ÉÇ7ÎUI0ÉÇªS?Re??QT?E? ?6%ÑÊ1?HI ÉÆª@?Be??Q??E? ?áEY ÙÆªDUBe??e??U??w$ÑÊ!??DY ÙÆG?EBe??Se??Ok?M?D[2Q??Ê?AÀU
2023 139 01:29:58>> 'AA0KE
As you have already tried replacing the power supply and re-burning the microSD card, I would recommend checking if all the connections between the sensor, the blue Shake board, and the Pi board are still solid and free from dirt or any other element that could compromise transmission. If needed, you can find assembly guides here in our manual: Assembly Guide — Instructions on Setting Up Your Raspberry Shake
When doing this, please make sure you are using proper ESD (ElectroStatic Discharge) protection (such as gloves, etc.), as electronics do not like static electricity too much.
Could I please ask you to also post some pictures of the RS4D from different angles, so that we can take a look at it? Thank you.
If this check comes out as positive, then we can think about what other options we have, but let’s see what the new analisys brings.
Thank you for your collaboration!