C65 Direct Boot Failed

[mbcommunication]

Tried Direct Boot On 2 C65 Today And Both Failed Would Not Connect Also Tested On 1 CF75 And That Unlocked With No Problems, Working Unlock Performed With USB to Serial Adaptor And C55 COM Cable But When Same Cable Was Used For C65 I Press Power On When Asked And Then Software Does Not Get Any Further Than Bypassing Boot And Phone Screen Stays Blank, Also Tried C55 With Furious Box As COM Port With C55 Cable RJ45 Software Wont Pass Bypassing Boot But This Time Service Mode Is Shown On The Screen. Any Ideas.

BR
Matty B