Hacking Hardware Modchip switch static on screen

[NauticalWater274]

I was running into a fuel gauge chip issue with my switch, so I replaced the chip. After replacing it I tried to test everything, but the switch wouldn't boot. The mod chip would blink purple and/or white (hard to tell tbh) a bit, then turn green and power off. Nothing would show up on the screen. I had to hold power + vol up to power it off and try to boot again. I took it apart, checked everything, and booted it without putting in the sd card. Then I got the No SD card screen, so I tried putting the sd card back in, powering it back on, and then the screen had a bunch of static.

Sometimes the static will have sort of purple or red hue. I tried checking the ribbon cable for the modchip that is under the CPU shield, but I accidentally removed some capacitors(?) when fighting with the shield. The pads look fine. I circled them red in the image, ignore the other things pointed out, its the only good picture I could find of them online.

I doubt that would be stopping the switch from booting since it already wasn't booting. I would like to replace them, but I don't know what part they are. I do have an old donor board I bought for some other things, but they appear to be missing already. If someone knows the part number, that would be great so I could buy some, or maybe there's another part of the board I could grab them from.

I'm more focused on figuring out the booting issue first though, missing these parts didn't change the behavior when trying to boot. I'm confused on why the switch could show the no sd card screen, but when I put the sd card in, its static. I tried another SD card but that didn't change anything. Any help appreciated!!

 

[thesjaakspoiler]

I think they are 0.1uF 10V 0201 capacitors.

Just my uneducated guess : Hekate shows the no-sd-card error in another mode than it is using to display the Hekate menu.
When you insert the SD card, it grabs the code form the SD card and initializes the screen in a high-res mode.

I don't know which type of Switch you have but you could try removing/disabling the mod chip, put it in the dock and see if you can boot into maintenance mode (keeping vol + and - pressed while powering on).
Unfortunately, Hekate doesn't work in docked mode so it's a bit hard to determine whether there is some issue with the lcd connector/cable or maybe some other issue.
You didn't overheat the board in the DRAM area?

 

[jkyoho]

show your cpu and ram area, static screen like this is mostly CPU or RAM related

 

[NauticalWater274]

I think they are 0.1uF 10V 0201 capacitors.

Just my uneducated guess : Hekate shows the no-sd-card error in another mode than it is using to display the Hekate menu.
When you insert the SD card, it grabs the code form the SD card and initializes the screen in a high-res mode.

I don't know which type of Switch you have but you could try removing/disabling the mod chip, put it in the dock and see if you can boot into maintenance mode (keeping vol + and - pressed while powering on).
Unfortunately, Hekate doesn't work in docked mode so it's a bit hard to determine whether there is some issue with the lcd connector/cable or maybe some other issue.
You didn't overheat the board in the DRAM area?

I tried reinserting the lcd connector and cables, but that didn't do anything. Maybe I overheated the DRAM when using the hot air on the fuel gauge ic. I did feel like it took a while to get it the chip off. The chip is on the underside though, so it would have been more difficult to heat it up.

show your cpu and ram area, static screen like this is mostly CPU or RAM related

I tried resoldering the mod chip to make sure it wasn't any cold solder joints. I also powered on the switch and put my fingers on the ram to see if the chips got hot, they didn't.

I saw somewhere to try booting ums-loader (lulle2007200/ums-loader) as the `payload.bin` since it only uses the RAM integrated to the APU, not the RAM chips. This payload did work, no artifacts, and I was able to navigate in the minimal menu. So seems like its my RAM chips :/
They look fine, and feel fine to the touch, so its interesting that one of them is dead. I'm going to have to find someone to replace them for me, I don't think I'm skilled enough to replace them, I don't have the stuff for reballing, and barely managed to replace that fuel gauge ic lol.