the unit is going to the boneyard... options other than self repair are not viable at this time. thanks for the replies
OK folks, I have an Inspiron 3455 with no boot video system arrived with this issue being the NTTSA (no time to screw around) guy, wiped the system reinstalled fresh W10.... oh well back to the same system boots with no error beeps with HDMI cable attached I get second monitor all well and good, straight into windows the media panel on the side, only power works, display mode no, volume up down no swapped out the 0K54K5, same thing updated BIOS cleared CMOS with jumper removal... also cleared the PWD with jumper (just in case) have pulled power, held power button down for 20-30 seconds... nada running wired mouse and keyboard this is really a nice system, being the Scotsman I am, would rather rub copper off a penny than toss this I am sure that someone has the exact answer to this issue   thanks, Bill  
Inspiron 3455 no video