no more xell, flashed jtag with rgh nand.

As title says I updated my mates xbox he said it was rgh, so patched his nand using jrunner. Flashed the nand on his xbox in xell, Rebooted and now no boot in normal mod eand no xell on eject. I have ck3 and nand x What qsb's can I use to get xell back on the machine. Can I use the r-jtag ones ?

Thanks for taking the time to read this.