long short short. emmc init failure and boots to ofw. in other times, it boots to atmosphere with one yellow led...how can i fix this oled?
Hi everyone, my switch boots to a bright purple screen, I desoldered all the wires and still the same. I accidentally desoldered this capacitor here (where the cursor is) (not my pic, taken from the PDF guide, I'm using a 2040Zero):
Could that be the issue? How can I troubleshoot it?
Edit: if you need pics of the console, I can provide them.
Yes the switch is the oled model, can I replace the CMD resistor in case it's defective? I'm gonna take some pics in a biton wich switch ? oled?
purple screen comes mostly after a mod from a defective Cmd Resistor.
check ur cmd resistor also upload some pics from ur install
also heard it could come from corrupt emmc.
u can run the switch with one missing capacitor but i would recommend replaying it , there are some on the rp2040 zero u can use i think thats also explained in the guide wich one u can use from there.
yeah sure u can replace it , its 4,7k ohm resistor.Yes the switch is the oled model, can I replace the CMD resistor in case it's defective? I'm gonna take some pics in a bit
Okay there are the pics:yeah sure u can replace it , its 4,7k ohm resistor.
nice but get some good quality ones please :-)
well u can use a smaller on but u need to be able to make a connection between both vias.Okay there are the pics:
View attachment 387054
This my poor attempt at re-soldering a resistor that I grabbed from the 2040Zero, but that thing is so small I don't know if that did something honestly.
Below is my CMD + exposed CLK point:
View attachment 387055
From what I can see, I probably fried the CMD resistor. Can i use a 0805 one? I have a lot of them around.
Edit: I was dumb and tried the mod with a larger tip than I should've used, I have some good ones here that are very small so hopefully these will help.
I tried to do a mosfet install but it wasn't good, I'm very sorry for the switch too. So 4.7k for the CMD and what about the one on the CPU?well u can use a smaller on but u need to be able to make a connection between both vias.
why did u rip if that ground pad? poor switch .
u can use any size of resistor u just need to get then to fit and make proper connection
u need to be a bit more carefull with the pads around ur solder use a finer tip and flux .
i think on the apu is a 0.1uf cap they are available on the rp2040zero the guid should point out where they are sittingI tried to do a mosfet install but it wasn't good, I'm very sorry for the switch too. So 4.7k for the CMD and what about the one on the CPU?
I don't have a 4.7k resistor, any alternatives?i think on the apu is a 0.1uf cap they are available on the rp2040zero the guid should point out where they are sitting
nope , if u have switch donor board v1/v2 laying aroung there are a few there otherwise u will have to order someI don't have a 4.7k resistor, any alternatives?
I don't have a 4.7k resistor, any alternatives?
Hi !!!
Somone can tell me about this error please "=*** eMMC init failure" ?
Never did get picofly to work on my switch, either with an actual 2040 or the hwfly like flxpcb they make. Bought a HWfly and it just worked. Now that I have the switch booting though, I've noticed that the volume down doesn't work? Pressing volume up makes the volume go all the way down. On probing the pins on a work switch, I have somewhere in the neighborhood of 1.8 Mohm to gnd, pressing the switches pulls the corresponding pin on the connector to gnd. On the faulty switch, volume up shows the expected behavior, while volume downs resistance is around 400k? Noteably, I double checked without the HWFLY installed, and the volume/power ribbon disconnected, also powered on and confirmed the behavior without the ribbon by manually pulling the pins to ground. This aligns with the fact that volume down appears to be stuck in firmware. something somewhere, is shorting to where it shouldn't. Anyone have any ideas?
Make sure nothing is stuck in the connector for the ribbon cable. Like some flux managed to sneak itself in there.Did my first OLED with the permanent dat0! Reballing with the magnetic stencil was so much easier and the balls turned out really good. First attempt I made a rookie mistake and had too much solder mask on the wire which caused the chip to not sit down properly. Once I scrapped away the excessive it sat down nice and even.
Was so happy to see the No SD Card screen afterwards.
Put it all back together only to find the right joy con is not being detected. Checked the flex cable and it appears fine. Left joy con is working fine. Anyone have this issue before?
It's late so I'll take the board out tomorrow and have a look to see if I took out any components by accident or something.
Dang, so close... lol.