Question about how to fix a electrical issue on a obscure game controller

[reubenj]

https://www.reddit.com/r/SteamController/comments/s5v7l6/overheating_current_overdraw_on_steam_controller/

An issue where the steam controller is overheating in the left grip. noticed over the last couple weeks that my controller has been draining batteries really fast but it was still working besides that. When plugged in a usb to the computer though (sans batteries) the SC LED starts rapidly flashing and input is unresponsive.

According to the TPS61029 pdf (https://www.ti.com/lit/ds/symlink/tps61020.pdf ) the IC accepts variable input, so if the regulator on the right [ TLV70230 ] ( https://www.ti.com/product/TLV702 ) is failing, it may be feeding the TPS61029 too much voltage.

Because it's a multi-layer pcb I can't tell which part comes first, the regulator or the boost converter, but if you can use a continuity test on the positive pin from the battery compartment you should be able to find out where that voltage hits first.
According to the datasheet on the 3V regulator in the controller, it has an enable pin that when pulled high, turns on the regulator and I believe, the controller.

https://www.ti.com/lit/ds/symlink/tlv702.pdf?ts=1642445860055

Enable pin. Driving EN over 0.9 V turns on the regulator. Driving EN below 0.4 V puts the regulator into shutdown mode and reduces operating current to 1 μA, nominal. For TLV702P, output voltage is discharged through an internal 120-Ω resistor when device is shut down

So, if this part is failing it could be turning the device back on.

If it's the regulator (TLV70230), then you can see what the output is, if it's higher than 3V, you know it's failed and it's a relatively easy fix. If not, it's more complicated I think.

[reubenj]

Sorry that's a bit of a smash together of all the replies.

Steam controller over heats on the left side, and auto turns on. They don't make them anymore so trying to keep what I have alive.