OK, i have an original Playstation 1 (the gray box one). It is a SCPH-550X. I bought an absolute stealth mod chip from here: http://www.psxtune.com/produktee.html
I got the chip ok and installed it (thanks to u guys!) but when i put everything back together, i press the power button, and nothing happens! The power light wont even come on! I rechecked the soldering points, and had my buddy resolder a couple of them, so im sure that none are bridging NOW, but still nothing happens. Please help!