PS3 CECH-2001A (DYN-001) UART issues

[Dukem02]

I can't auth into this thing no matter what I do. Ive swapped RxD and TxD multiple times, resoldered them, checked continuity to syscon itself (pins 78 and 79), and soldered the ground directly to the copper. I tried using the script via CMD and NostaDiag. I double checked my adapter works and auth'd into a CECHL and CECHG with 0 issues. The system itself works fine, but I just CANT auth into syscon for some reason. Am I stupid? Anyone else have this issue before?

 

[khubik]

Hi. You want to make sure that you're getting the +5V_EVER from your power supply (it gets supplied to the board over the small 4-pin cable and should be present on pin 1 and pin 4), see https://www.psdevwiki.com/ps3/Template:PS3_PSU_Control_connector_4_pins
This voltage lane gets stepped down further into +3.3V_EVER by one of the voltage regulators beneath the connector.
If you do get +5V_EVER coming out of your PSU, you might want to make sure you're getting +3.3V_EVER on pins 35 and 36 of the Syscon next.
If you don't, look for shorts or failed components on these power lines.