Hello I'm a beginner but have read a lot about it,

My VU+ DUO2 only shows a white LED, so I want to flash the bootloader again. But for my chip k9k8go8uod I Need a BCM7424 but I can't find anywhere. I would also like to know which Jtag port I can use, the P703, P401 or P301? I bought the Cypress CY7C68013A EZ-USB FX2LP on eBay and it should arrive in a few days.

Can anyone help me? I'm grateful for any advice.