Infinity install prob, advice needed please

[mrbluesman]

Matrix Infinity installed in v5 PS2 and I don't see the version number under the Playstation 2 logo on boot. The console works fine, exactly as it did before the install, so I stripped it down again to recheck my soldering, all seems ok but I decided to shorten the ground and 3.3v wires, (shame cos' I thought they looked pretty tidy), re-assemble and boot.........same prob This is my 2nd install, the first was my own v9 and I also did the Romeo mod and it works perfectly, reading just about anything I chuck in the cd tray. I do have pics of the install. Can you point me in the right direction please, ta