I have a Onyx Studio that doesn't power on. No components look visually damaged. I noticed that BT_3.3V was only at ~3.0v, after some measuring around, I found that L600 had ~3.3v coming in but only ~3.0v going out. I bypassed it for testing with a small jumper, now BT_3.3V measures at ~3.275v, but the speaker still doesn't work. Battery is fully charged at almost exactly 4.2v. I tried removing C306 but it didn't seem to change anything. Any other ideas where to look?

Plugging the USB port into my laptop and running `lsusb` doesn't show the speaker, not sure if this info helps.

Anyone have the schematic/boardview for this one? Lenovo Yoga 7 16IAH7, board HYG71 NM-E201 Rev 1.0...

Re: Schematic Dell Inspiron 7386

I finally found a download, it's attached here for future users....

Re: Schematic Dell Inspiron 7386



Any chance you also have the boardview?...