|If there are bent pins, they most likely weren't bent until you pulled the CPU, which I don't know why you did in the 1st place? But since you did, I assume you cleaned off all traces of the old thermal material from both the CPU & heatsink, then re-applied fresh paste using the vertical line method?|
Also, you didn't list your complete specs - motherboard, CPU, RAM, graphics, HDD, power supply. Are there any beep codes coming from the tower?
Do as suggested - disconnect ALL unnecessary hardware to see if you can
pinpoint the problem. Start by unplugging the power cord, then remove all PCI & PCIe cards, connect the monitor to the onboard graphics port. Unplug all external devices except the keyboard & monitor (use a wired keyboard, PS/2 if possible). Unplug all drives (HDDs & Optical). Remove all RAM except for one stick. While still unplugged, use the clear CMOS jumper to reset the BIOS. Then plug in the power cord & see if the system will boot. If it does, immediately enter the BIOS & correct the date/time & any other settings affected by the reset. Then begin reassembling, adding one hardware item at a time.
message edited by riider