I got this off a less than honest seller on Ebay. It was claimed no parts were harvested however I found the resistors for the power button missing and a big nasty blob of solder where they should be. Broken rails and a messy SD unit had been swapped into this machine… It was a mess.
First thing I noticed was the LCD malfunctioning and the touch panel would not function. It works perfect in docked mode. Some obvious work had been done in the area with the power and fan connections on MB. I replaced the resistors (missing) for the power button and reflowed the port so now volume +/- also work. The connector on the MB to the cartridge slot looks… iffy. I think someone tried to replace it but all the components surrounding are at least on the board. It is exploitable and I can send payloads. I sent it biskey reading that if the graphic glitches disappear with it, likely software/battery reset issue. Same unusual glitching/tearing/blinking. Definitely thinking hardware at this point.
I put the MB in another Switch and got exactly the same symptoms. I tried to put in a cartridge and get an immediate error code as if its shorting and switch asks for power off.
I dont see the back light blinking in and out under the MB when on. The ribbon connector for LCD on MB looks clean and no parts seem to be missing.
“I’d check the 8316 IC is being told to turn on the outputs and if yes if the outputs are at the correct voltage, that being +5V and -5V”
I did this and outputs are high and correct voltage. I know I need to dig deeper and measure power and resistance, but these symptoms have to point to an area I should focus on?
I think Im going to take the MB cartridge port off (get another) to least see if that alleviates some of the weirdness. I mean its useless as it ATM.
Thank you for reading and any ideas are helpful.