Good job. I installed the +5 volts mod from Console5 too, no delay BIOS, and the AV mod from Ebay (http://www.ebay.com/itm/ColecoVision-A-V-Composite-Video-Mod-Kit-NTSC-PAL-DIY-/181061180246?var=&hash=item2a28165b56:m:m_9WzGb9DsMt7YHk-d5g4GQ)... and mess up one of my Coleco's sadly (after the ram install which was the last step). 100% my fault.
I think that I either killed my VDP, or one of the RAM modules is bad.
I'll eventually get a pro to look at it.