hi my pc wont boot fans all come on but no signal to monitor cleaned out all dust from psu and rest of pc tested the psu with the paper clip method found this on the net worked fine tried the monitor on my laptop that works fine tried booting without added graphics card no change its only a cheap pc a emachines e4216 with a intel 925 dual core processor, 2gb ram added myself 500mb when brought new, 200gb seagate hard drive replaced 6 month ago but was second hand and a geforce 8500gt graphics card pc was working ok before this problem it used to unexpectedly shutdown within the first 5 min everytime but on the second start it worked fine and somtimes would get stuck when booting up and no matter how you wait it wouldn't boot up had to switch off power supply and restart but once warmed up was fast on internet and played games like gears of war 3 and call of duty black ops with no problems only on the odd time games would freeze/crash please can someone help hoping to do a home repair cant afford new pc at the minute out off work