challou

HELLO MY PROBLEM IS MY AVICF700BT CANT ENTER AT TEST-MODE ????? SERVES MODE WORK BUT WHEN I TRY TO CHEK UBOOT TEST ITS SAY BAD UBOOT CAN ANYONE HELP ME PLZ I HAVE TRY TO UBDATE TO MANY VERSION AND ITS STILL AT 100% AND NOTHING HAPPENED SO PLZ CAN YOU HELP OR ANYONE HAVE A U BOOT FOR AVIC F700BT

PLZ HELP BED UBOOT TEST AY KAN WRITE DE WINIMG , AY KAN FORMATBDRM ,AY KAN UPDATE UBOOT ? SORRY FOR MY ENGELS .