Maybe the culprit in not your wire, could be your dat0 adapter...Hi, yesterday my Switch OLED wont turn on. The HWfly LED pulses purple, and then solid red. So i've desoldered the emmc point on the chip, and soldered again. Now the console starts without problem. But this is my second time that this happens. The console wont start like this, always when i leave the console charging too long (like 24h+). Any ideas?
I don't like too much the one that comes with the oled v4, the single anchor point one, I prefer the double anchored one. Also check for rests of uncleaned flux that can give to you false contacts in the MMC dat0 point.
Hope it helps