Hi all,
I’ve scoured these forums and silently lurked for a bit before posting to make sure that I tried to cover my bases before asking.
I am also open to the opinion of others that state that my switch is likely fried, that is ok too.
I have an unpatched switch. The switch has also had autorcm installed so that I could boot a payload for homebrew. I got lazy a while ago and didn’t want to use the injector anymore so I tried to install a rcmx86, which I think was supposed to automatically inject the payload for me. Well, I failed at installing it. So bad, in fact that my switch no longer powers on. I was silly enough to a) not use a microsocpe b) turn it on with a bridge on the m92t36 and capacitors near it and c) repeatedly try to turn it on.
It was then shelved for a while and I got inspiration to try to get it working again, no matter how unlikely it may be…
I got some more equipment and checked the following and did the following things:
- Current check for switch with battery or without battery, just bare board. 5V/0A with power supply
- Check for shorts on capacitors by the m92t36, there were none. HOWEVER, because I shorted the m92t36 previously, I replaced it.
- Check for shorts on caps by bq chip, there are none
- check that one fuse by usb c port and with power (oops), it has 5 volts on both ends if not using nintendo charger with bare board.
- Check 2r2/inductor coil for badness, “appears shorted” by resistance and has high resistance when checked against ground of usb c, I believe that is normal and an indication this is good
- Reflow usb c port
- Check usb c port pins, I forget which ones (3…9?? or was it 3,6) had 5V on them when power applied.
- Visually inspect for damage to components, could not find any, except for the damage I have done… See below
- Check voltage on pin 6/others of mt chip. It seems that I got either something along the lines of 1.5-3.somethingV which is really strange to me.
- Reflowed/removed re soldered the m9t chip to ensure it was actually connected… .eh.
- Casually check some resistance for caps on back of CPU. Can get again, but IIRC they weren’t too low/too out of range from expected values… but could measure again.
In my quest to replace m9t, I have knocked off some capacitors like lots of others but am wondering if they are really needed? I’ve heard some things such as they aren’t needed technically, or they are.
cannot upload pics at the moment but it is the cap to the left of the m92t36 on the top, the two big ones but the one on top and then the second big one on the right.
I believe it is 4.7uf 10v 0402 and the 1uf of 2.2uf 6.3v 0402 caps.
Are there other things to check? Oh, and believe me I was in denial trying to get it to boot/show signs of RCM… no…
I think at this point I am just looking to see if I missed something major, like an important power rail thing. Seems odd that we get only 5V, no current.