Rebug Error

i trying another port USB doesn't work also. i'm really so much sad and give up

i have problem my REBUG_4.75.3_D-REX and i can't go firmware when i turn my ps3 the ps3 directly go to recovery mode but when i connect my controller the light never stop same msg Connect the controller using a USB cable, and then press the PS button . when i press PS button the controller turn off ? i changed USB also Controller 4 times.

Before you flash your console go back to recovery mode ad try picking number 4 - Rebuild your data if that dont work go back into recovery mode and pick restore ps3 and see if that helps. Usually restore ps3 will help

i can't used any number .. i can't choose any number of recovery mode just first msg i can see it .

please i need help bro

Try pressing the PS button on the controller without attaching the usb cable while in recovery mode.
Charge your ps3 controller to full battery, then try this method, if its works then go to System update on ps3, and reinstall the same cex/dex version of your CFW.