Do you have any original dvd drive or dongle to test out? Check if the PlayStation 2 motherboard copper colored ribbon cable isn’t disconnected, the ps2 controller port ribbon cable isn’t disconnected. Also check if the ps2 main board is being powered up, check the optical audio port and the red light should still be lit up. Check what sound is coming out of the rca audio jacks. the sound probably won’t sound through the speakers, you may need to plug in some headphones.
Beep codes:
6 dings and no errors- valid dongle and media file(s) found.
3 dings followed by a repeated “wah” sound - no dongle and media file(s) have been detected.
6 dings followed by the repeated “wah” sounds or doesn’t boot- dongle has been detected but no media file is present.