xbox fault

[Hull_chipper]

I chipped a v1.3 with a Smartbox LPC mod this evening (I have chipped several xbox's with several different chips & this is not the first time I have used this chip in a 1.3 machine).

I got the typical red/green flashing light, so checked my points over & over & ended up removing the chip.

Now, with the chip removed the xbox flashes red/orange on boot-up & displays a black screen.

I have of course made every attempt to clean the board of solder & check for shorts.

Can anybody spread any more light on where my problem lies?

Thanx in advance