So I had a customer drop in a Switch that needed a charge port.
I replace the charge port, check under the scope and all pins are clean and soldered on.
I go to charge it, it’s pulling 0.40amps - OK, battery is clearly depleted.
Leave it on charge for three hours, and still charging at 0.40amps… hmm that’s odd.
Try to power it on, nothing. So I try a known-good battery, still nothing.
No boot logo or animation, no charge indicator… hmm.
We’re getting 3.8v to the battery, so it’s definitely charging… this is a weird one I’m thinking.
So I send the customer a text, “Hey, the repair is done but we are waiting for it to charge up so we can test everything then complete the job”
The customer replies, saying that “Oh, I forgot to mention but the Switch has auto-RCM enabled so you won’t get anything on boot without injecting a payload”
Oh, this explains a lot. Sure enough, plug it into a PC and it is detected. Boot into Hekate and we have a working Switch. Yay! I wasn’t going insane.
After all that stress it was as simple as an auto-RCM causing no boot logo or charge indicator. This got me thinking about repairs @TronicsFix had done, where there is just no power even if it successfully appears to be charging. Especially with eBay purchases of faulty units - check if the unit simply has auto-RCM enabled and try to boot into Hekate!
I thought I would share this with you all, as a laugh, but something to keep in mind.